The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform
Kisuk Kang - One of the best experts on this subject based on the ideXlab platform.
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
AMER CHEMICAL SOC, 2018Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Dong-hwa Seo, Bk Kim, Js Kim, Hy Kim, Hi Yoo, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na 1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg-1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e- per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/ V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system. © 2013 American Chemical Society.20720
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
2016Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system
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A new high-energy cathode for a Na-ion battery with ultrahigh stability.
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low a...
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A new high-energy cathode for a Na-ion battery with ultrahigh stability
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ~600 Wh kg(-1), the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e(-) per formula unit) and the high potential (~3.8 V vs Na(+)/Na) of the tailored Vanadium Redox Couple (V(3.8+)/V(5+)). Furthermore, an outstanding cycle life (~95% capacity retention for 100 cycles and ~84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system.
Young-uk Park - One of the best experts on this subject based on the ideXlab platform.
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
AMER CHEMICAL SOC, 2018Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Dong-hwa Seo, Bk Kim, Js Kim, Hy Kim, Hi Yoo, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na 1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg-1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e- per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/ V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system. © 2013 American Chemical Society.20720
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
2016Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system
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A new high-energy cathode for a Na-ion battery with ultrahigh stability.
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low a...
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A new high-energy cathode for a Na-ion battery with ultrahigh stability
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ~600 Wh kg(-1), the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e(-) per formula unit) and the high potential (~3.8 V vs Na(+)/Na) of the tailored Vanadium Redox Couple (V(3.8+)/V(5+)). Furthermore, an outstanding cycle life (~95% capacity retention for 100 cycles and ~84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system.
Yongchai Kwon - One of the best experts on this subject based on the ideXlab platform.
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Mesoporous tungsten oxynitride as electrocatalyst for promoting Redox reactions of Vanadium Redox Couple and performance of Vanadium Redox flow battery
Applied Surface Science, 2018Co-Authors: Wonmi Lee, Sol Youk, Hun Yong Shin, Jinwoo Lee, Yongjin Chung, Yongchai KwonAbstract:Abstract For enhancing the performance of Vanadium Redox flow battery (VRFB), a sluggish reaction rate issue of V 2+ /V 3+ Redox Couple evaluated as the rate determining reaction should be addressed. For doing that, mesoporous tungsten oxide (m-WO 3 ) and oxyniride (m-WON) structures are proposed as the novel catalysts, while m-WON is gained by NH 3 heat treatment of m-WO 3 . Their specific surface area, crystal structure, surface morphology and component analysis are measured using BET, XRD, TEM and XPS, while their catalytic activity for V 2+ /V 3+ Redox reaction is electrochemically examined. As a result, the m-WON shows higher peak current, smaller peak potential difference, higher electron transfer rate constant and lower charge transfer resistance than other catalysts, like the m-WO 3 , WO 3 nanoparticle and mesoporous carbon, proving that it is superior catalyst. Regarding the charge-discharge curve tests, the VRFB single cell employing the m-WON demonstrates high voltage and energy efficiencies, high specific capacity and low capacity loss rate. The excellent results of m-WON are due to the reasons like (i) reduced energy band gap, (ii) reaction familiar surface functional groups and (ii) greater electronegativity.
Hyung Soon Kwon - One of the best experts on this subject based on the ideXlab platform.
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
AMER CHEMICAL SOC, 2018Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Dong-hwa Seo, Bk Kim, Js Kim, Hy Kim, Hi Yoo, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na 1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg-1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e- per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/ V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system. © 2013 American Chemical Society.20720
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
2016Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system
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A new high-energy cathode for a Na-ion battery with ultrahigh stability.
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low a...
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A new high-energy cathode for a Na-ion battery with ultrahigh stability
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ~600 Wh kg(-1), the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e(-) per formula unit) and the high potential (~3.8 V vs Na(+)/Na) of the tailored Vanadium Redox Couple (V(3.8+)/V(5+)). Furthermore, an outstanding cycle life (~95% capacity retention for 100 cycles and ~84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system.
Inkyung Kim - One of the best experts on this subject based on the ideXlab platform.
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
AMER CHEMICAL SOC, 2018Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Dong-hwa Seo, Bk Kim, Js Kim, Hy Kim, Hi Yoo, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na 1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg-1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e- per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/ V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system. © 2013 American Chemical Society.20720
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A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh Stability
2016Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system
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A new high-energy cathode for a Na-ion battery with ultrahigh stability.
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ∼600 Wh kg–1, the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e– per formula unit) and the high potential (∼3.8 V vs Na+/Na) of the tailored Vanadium Redox Couple (V3.8+/V5+). Furthermore, an outstanding cycle life (∼95% capacity retention for 100 cycles and ∼84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low a...
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A new high-energy cathode for a Na-ion battery with ultrahigh stability
Journal of the American Chemical Society, 2013Co-Authors: Young-uk Park, Hyung Soon Kwon, Inkyung Kim, Han-ill Yoo, Haegyeom Kim, Dong-hwa Seo, Jongsoon Kim, Byoungkook Kim, Kisuk KangAbstract:Large-scale electric energy storage is a key enabler for the use of renewable energy. Recently, the room-temperature Na-ion battery has been rehighlighted as an alternative low-cost technology for this application. However, significant challenges such as energy density and long-term stability must be addressed. Herein, we introduce a novel cathode material, Na1.5VPO4.8F0.7, for Na-ion batteries. This new material provides an energy density of ~600 Wh kg(-1), the highest value among cathodes, originating from both the multielectron Redox reaction (1.2 e(-) per formula unit) and the high potential (~3.8 V vs Na(+)/Na) of the tailored Vanadium Redox Couple (V(3.8+)/V(5+)). Furthermore, an outstanding cycle life (~95% capacity retention for 100 cycles and ~84% for extended 500 cycles) could be achieved, which we attribute to the small volume change (2.9%) upon cycling, the smallest volume change among known Na intercalation cathodes. The open crystal framework with two-dimensional Na diffusional pathways leads to low activation barriers for Na diffusion, enabling excellent rate capability. We believe that this new material can bring the low-cost room-temperature Na-ion battery a step closer to a sustainable large-scale energy storage system.
