The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Kening Sun - One of the best experts on this subject based on the ideXlab platform.
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ion selective prussian blue modified Celgard separator for high performance lithium sulfur battery
Chemsuschem, 2018Co-Authors: Lishuang Fan, Yue Qiu, Maoxu Wang, Junhan Cheng, Bin Guan, Zhikun Guo, Naiqing Zhang, Kening SunAbstract:Application of Li-S batteries has been restricted because of their major problem, that is, shuttling of soluble polysulfides between electrodes, which results in serious capacity fading. For the development of high-performance Li-S batteries, we first time utilize a simple growth method to introduce a Prussian blue (PB)-modified Celgard separator as an ion-selective membrane. The unique structure of PB could effectively suppress the shuttle of polysulfides but scarcely affect the transfer ability of lithium ions, which is beneficial to achieve high sulfur conversion efficiency and capacity retention. The Li-S battery with PB-modified Celgard separator has an average capacity decay of only 0.03 % per cycle at 1 C after 1000 cycles.
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Ion‐Selective Prussian‐Blue‐Modified Celgard Separator for High‐Performance Lithium–Sulfur Battery
ChemSusChem, 2018Co-Authors: Lishuang Fan, Yue Qiu, Maoxu Wang, Junhan Cheng, Bin Guan, Zhikun Guo, Naiqing Zhang, Kening SunAbstract:Application of Li-S batteries has been restricted because of their major problem, that is, shuttling of soluble polysulfides between electrodes, which results in serious capacity fading. For the development of high-performance Li-S batteries, we first time utilize a simple growth method to introduce a Prussian blue (PB)-modified Celgard separator as an ion-selective membrane. The unique structure of PB could effectively suppress the shuttle of polysulfides but scarcely affect the transfer ability of lithium ions, which is beneficial to achieve high sulfur conversion efficiency and capacity retention. The Li-S battery with PB-modified Celgard separator has an average capacity decay of only 0.03 % per cycle at 1 C after 1000 cycles.
Arumugam Manthiram - One of the best experts on this subject based on the ideXlab platform.
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Lithium-Sulfur Batteries with a Vertical Co9S8 Hollow Nanowall Arrays-Modified Celgard Separator
ECS Meeting Abstracts, 2019Co-Authors: Arumugam ManthiramAbstract:Advanced energy-storage technologies are urgently needed to satisfy the energy demands of the society. Sulfur is an appealing candidate for high energy-density batteries, owing to its high theoretical capacity (1,675 mA h g-1), natural abundance, and low cost.1-3 However, the rapid capacity degradation, low Coulombic efficiency, and short cycle life originating from polysulfide dissolution and migration remain challenging for the practical application of lithium-sulfur (Li-S) batteries.4, 5Our previous reports have demonstrated that configuring interlayers between the separator and the sulfur cathode is an effective and convenient strategy to alleviate the shuttle effect.6 However, most of those interlayers are fabricated by vacuum-filtration method, which makes those polar materials easily stack together and thus form a very thick interlayer. Therefore, on the one hand, the transport of lithium ions will be limited by the thick polar interlayers, which is not desirable for fast insertion/de-insertion of Li ions and high rate capacity. On the other hand, the stacked thick interlayers, as an inactive material, will decrease the overall cell energy density. To address such issues, we present here a novel Co9S8 nanowall array with vertical hollow naoarchitecture as an efficient barrier for lithium polysulfides (LiPS) in Li-S batteries.7 We present well-aligned, hollow Co9S8 arrays in-situ grown on a Celgard (Co9S8-Celgard) separator as an efficient polysulfide barrier for high-performance Li-S cells without any significant increase in the weight and volume (Fig. 1a). This novel concept/strategy of designing a multifunctional separator via in-situ grown polar and conductive materials (Co9S8 hollow arrays) on a commercial separator dramatically suppresses the shuttle effect of LiPSs and significantly improves the electrochemical performance of Li-S cells. Due to its well-designed structure, in-situ growth/transformation, and the polarity and high conductivity of Co9S8, the Li-S cell with the Co9S8-Celgard separator not only effectively blocks the LiPSs even with pure sulfur cathodes with a high sulfur loading (5.6 mg cm-2), but also delivers excellent specific capacity, outstanding rate capability, and remarkable cycling stability for an impressive number of 1,000 cycles (Fig. 1b - d). In essence, the novel design and in-situ growth of MOF-derived multifunctional Co9S8 layers are crucial to suppress the severe polysulfide diffusion and alleviate the shuttle effect of LiPSs. We believe that this approach would promote greatly the development of modified separators, particularly the design and synthesis of multifunctional separators. Fig. 1 (a) Schematic illustration of the synthesis process of Co9S8-Celgard. (b) Rate performances at various cycling rates with the Celgard, MOF-Celgard, and Co9S8-Celgard separators. (c) Cycling performances of Li-S cells with high sulfur-loading cathodes with Co9S8-Celgard separators. (d) Long-term cycling performances of the Li-S cells with the Co9S8-Celgard separators at 1C rate for 1,000 cycles. REFERENCES1 J. He, Y. Chen, W. Lv, K. Wen, C. Xu, W. Zhang, Y. Li, W. Qin, W. He, ACS Nano 2016, 10, 10981. 2 J. He, L. Luo, Y. Chen, A. Manthiram, Adv. Mater. 2017, 29, 1702707. 3 F. Wu, J. T. Lee, N. Nitta, H. Kim, O. Borodin, G. Yushin, Adv. Mater. 2015, 27, 101. 4 G. Zhou, S. Pei, L. Li, D. Wang, S. Wang, K. Huang, L. Yin, F. Li, H. Cheng, Adv. Mater. 2014, 26, 625. 5 J. He, Y. Chen, P. Li, F. Fu, Z. Wang, W. Zhang, J. Mater. Chem. A 2015, 3, 18605. 6 Y. Su, A. Manthiram, Nat. Commun. 2012, 3, 1166. 7 J. He, Y. Chen, A. Manthiram, Energ. Environ. Sci. 2018, 11, 2560. Figure 1
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Vertical Co9S8 hollow nanowall arrays grown on a Celgard separator as a multifunctional polysulfide barrier for high-performance Li–S batteries
Energy & Environmental Science, 2018Co-Authors: Yuanfu Chen, Arumugam ManthiramAbstract:Lithium–sulfur (Li–S) batteries have been regarded as one of the most promising next-generation energy-storage devices, due to their low cost and high theoretical energy density (2600 W h kg−1). However, the severe dissolution of lithium polysulfides (LiPSs) and the fatal shuttle effect of the sulfur cathode seriously hinder the practical applications of Li–S batteries. To address such issues, we present here, for the first time, a novel metal organic framework (MOF)-derived Co9S8 nanowall array with vertical hollow nanoarchitecture and high electrical conductivity, which is grown in situ on a Celgard separator (Co9S8–Celgard) via a feasible and scalable liquid-reaction approach, as an efficient barrier for LiPSs in Li–S batteries. Benefiting from the direct in situ growth of vertical Co9S8 hollow nanowall arrays as a multifunctional polar barrier, the Co9S8–Celgard separator possesses large surface area, excellent mechanical stability, and particularly strong LiPS-trapping ability via chemical and physical interactions. With these advantages, even with a pure sulfur cathode with a high sulfur loading of 5.6 mg cm−2, the Li–S cells with the Co9S8–Celgard separator exhibit outstanding electrochemical performance: the initial specific capacity is as high as 1385 mA h g−1 with a retention of 1190 mA h g−1 after 200 cycles. The cells deliver a high capacity of 530 mA h g−1 at a 1C rate (1675 mA g−1) even after an impressive number of 1000 cycles with an average capacity fade of only 0.039% per cycle, which is promising for long-term cycling application at high charge/discharge current densities, and pouch-type Li–S cells with the Co9S8–Celgard separator display excellent cycling performance. When the optimized cathode with the sulfur loading in well-designed yolk–shelled carbon@Fe3O4 (YSC@Fe3O4) nanoboxes is employed, the cell with Co9S8–Celgard delivers a high initial capacity of 986 mA h g−1 at a 1C rate with a capacity retention as high as 83.2% even after a remarkable number of 1500 cycles. This work presents a strategy to grow on the separator a multifunctional polar interlayer with unique nanoarchitecture and high conductivity to chemically and physically trap the LiPSs, thus significantly enhancing the performance of Li–S batteries.
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A polyethylene glycol-supported microporous carbon coating as a polysulfide trap for utilizing pure sulfur cathodes in lithium-sulfur batteries.
Advanced materials (Deerfield Beach Fla.), 2014Co-Authors: Sheng Heng Chung, Arumugam ManthiramAbstract:A composite separator with a thin-film polysulfide trap is developed for lithium-sulfur batteries. A polyethylene glycol-supported microporous carbon coating (MPC/PEG coating) on a Celgard separator suppresses polysulfide diffusion through its physical and chemical polysulfide-trapping capabilities. The MPC/PEG-coated separator thus facilitates the use of pure sulfur cathodes that generally suffer from poor cyclability and low electrochemical utilization.
Lishuang Fan - One of the best experts on this subject based on the ideXlab platform.
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ion selective prussian blue modified Celgard separator for high performance lithium sulfur battery
Chemsuschem, 2018Co-Authors: Lishuang Fan, Yue Qiu, Maoxu Wang, Junhan Cheng, Bin Guan, Zhikun Guo, Naiqing Zhang, Kening SunAbstract:Application of Li-S batteries has been restricted because of their major problem, that is, shuttling of soluble polysulfides between electrodes, which results in serious capacity fading. For the development of high-performance Li-S batteries, we first time utilize a simple growth method to introduce a Prussian blue (PB)-modified Celgard separator as an ion-selective membrane. The unique structure of PB could effectively suppress the shuttle of polysulfides but scarcely affect the transfer ability of lithium ions, which is beneficial to achieve high sulfur conversion efficiency and capacity retention. The Li-S battery with PB-modified Celgard separator has an average capacity decay of only 0.03 % per cycle at 1 C after 1000 cycles.
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Ion‐Selective Prussian‐Blue‐Modified Celgard Separator for High‐Performance Lithium–Sulfur Battery
ChemSusChem, 2018Co-Authors: Lishuang Fan, Yue Qiu, Maoxu Wang, Junhan Cheng, Bin Guan, Zhikun Guo, Naiqing Zhang, Kening SunAbstract:Application of Li-S batteries has been restricted because of their major problem, that is, shuttling of soluble polysulfides between electrodes, which results in serious capacity fading. For the development of high-performance Li-S batteries, we first time utilize a simple growth method to introduce a Prussian blue (PB)-modified Celgard separator as an ion-selective membrane. The unique structure of PB could effectively suppress the shuttle of polysulfides but scarcely affect the transfer ability of lithium ions, which is beneficial to achieve high sulfur conversion efficiency and capacity retention. The Li-S battery with PB-modified Celgard separator has an average capacity decay of only 0.03 % per cycle at 1 C after 1000 cycles.
Xinsheng Peng - One of the best experts on this subject based on the ideXlab platform.
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Blocking Polysulfides and Facilitating Lithium-Ion Transport: Polystyrene Sulfonate@HKUST-1 Membrane for Lithium-Sulfur Batteries.
ACS applied materials & interfaces, 2018Co-Authors: Yi Guo, Minghao Sun, Hong-qing Liang, Wen Ying, Xianqing Zeng, Yulong Ying, Shudong Zhou, Chengdu Liang, Zhan Lin, Xinsheng PengAbstract:Minimizing the shuttle effect of polysulfides (PS) is crucial for practical applications of lithium-sulfur (Li-S) batteries. However, the trade-off between effective suppression of the shuttle effect and fast redox reaction kinetics is inevitable for separator-based Li-S batteries. Herein, via a self-confined solid-conversion process, we develop a polystyrene sulfonate (PSS)-threaded well-intergrown HKUST-1 (Cu3(BTC)2) (BTC: 1,3,5-benzenetricarboxylic acid)-coated Celgard separator (PSS@HKUST-1/Celgard, PHC) for high-performance Li-S batteries. The PHC membrane favors the interception and accommodation of long-chain PS. Notably, enormous sulfonate groups of the three-dimensional PSS networks in PSS@HKUST-1 membrane significantly facilitate lithium-ion transport, which guarantee fast redox kinetics. The PHC separator demonstrates efficient inhibition of PS (i.e., 4 orders of magnitude lower in PS permeation rate) with fast Li+ transportation (i.e., 71% higher in ionic conductivity) than the Celgard separator. When applying the PHC membrane in Li-S batteries with conventional sulfur/super P carbon cathode, highly reversible capacity with an average fading rate of 0.05% per cycle is maintained for 500 cycles at 0.5 C, excellent rate performance up to 5 C, and high areal capacity over 7 mA h cm-2 are also achieved. This work paves a new way for addressing the trade-off between suppressing the PS shuttle effect and fast kinetic reaction for separator-based Li-S batteries.
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Blocking Polysulfides and Facilitating Lithium-Ion Transport: Polystyrene Sulfonate@HKUST‑1 Membrane for Lithium–Sulfur Batteries
2018Co-Authors: Yi Guo, Minghao Sun, Hong-qing Liang, Wen Ying, Xianqing Zeng, Yulong Ying, Shudong Zhou, Chengdu Liang, Zhan Lin, Xinsheng PengAbstract:Minimizing the shuttle effect of polysulfides (PS) is crucial for practical applications of lithium–sulfur (Li–S) batteries. However, the trade-off between effective suppression of the shuttle effect and fast redox reaction kinetics is inevitable for separator-based Li–S batteries. Herein, via a self-confined solid-conversion process, we develop a polystyrene sulfonate (PSS)-threaded well-intergrown HKUST-1 (Cu3(BTC)2) (BTC: 1,3,5-benzenetricarboxylic acid)-coated Celgard separator (PSS@HKUST-1/Celgard, PHC) for high-performance Li–S batteries. The PHC membrane favors the interception and accommodation of long-chain PS. Notably, enormous sulfonate groups of the three-dimensional PSS networks in PSS@HKUST-1 membrane significantly facilitate lithium-ion transport, which guarantee fast redox kinetics. The PHC separator demonstrates efficient inhibition of PS (i.e., 4 orders of magnitude lower in PS permeation rate) with fast Li+ transportation (i.e., 71% higher in ionic conductivity) than the Celgard separator. When applying the PHC membrane in Li–S batteries with conventional sulfur/super P carbon cathode, highly reversible capacity with an average fading rate of 0.05% per cycle is maintained for 500 cycles at 0.5 C, excellent rate performance up to 5 C, and high areal capacity over 7 mA h cm–2 are also achieved. This work paves a new way for addressing the trade-off between suppressing the PS shuttle effect and fast kinetic reaction for separator-based Li–S batteries
Yuanfu Chen - One of the best experts on this subject based on the ideXlab platform.
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Vertical Co9S8 hollow nanowall arrays grown on a Celgard separator as a multifunctional polysulfide barrier for high-performance Li–S batteries
Energy & Environmental Science, 2018Co-Authors: Yuanfu Chen, Arumugam ManthiramAbstract:Lithium–sulfur (Li–S) batteries have been regarded as one of the most promising next-generation energy-storage devices, due to their low cost and high theoretical energy density (2600 W h kg−1). However, the severe dissolution of lithium polysulfides (LiPSs) and the fatal shuttle effect of the sulfur cathode seriously hinder the practical applications of Li–S batteries. To address such issues, we present here, for the first time, a novel metal organic framework (MOF)-derived Co9S8 nanowall array with vertical hollow nanoarchitecture and high electrical conductivity, which is grown in situ on a Celgard separator (Co9S8–Celgard) via a feasible and scalable liquid-reaction approach, as an efficient barrier for LiPSs in Li–S batteries. Benefiting from the direct in situ growth of vertical Co9S8 hollow nanowall arrays as a multifunctional polar barrier, the Co9S8–Celgard separator possesses large surface area, excellent mechanical stability, and particularly strong LiPS-trapping ability via chemical and physical interactions. With these advantages, even with a pure sulfur cathode with a high sulfur loading of 5.6 mg cm−2, the Li–S cells with the Co9S8–Celgard separator exhibit outstanding electrochemical performance: the initial specific capacity is as high as 1385 mA h g−1 with a retention of 1190 mA h g−1 after 200 cycles. The cells deliver a high capacity of 530 mA h g−1 at a 1C rate (1675 mA g−1) even after an impressive number of 1000 cycles with an average capacity fade of only 0.039% per cycle, which is promising for long-term cycling application at high charge/discharge current densities, and pouch-type Li–S cells with the Co9S8–Celgard separator display excellent cycling performance. When the optimized cathode with the sulfur loading in well-designed yolk–shelled carbon@Fe3O4 (YSC@Fe3O4) nanoboxes is employed, the cell with Co9S8–Celgard delivers a high initial capacity of 986 mA h g−1 at a 1C rate with a capacity retention as high as 83.2% even after a remarkable number of 1500 cycles. This work presents a strategy to grow on the separator a multifunctional polar interlayer with unique nanoarchitecture and high conductivity to chemically and physically trap the LiPSs, thus significantly enhancing the performance of Li–S batteries.