The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Xiaokun Zhang - One of the best experts on this subject based on the ideXlab platform.
-
ultrathin flexible solid polymer composite Electrolyte enabled with aligned nanoporous host for lithium batteries
Nature Nanotechnology, 2019Co-Authors: Xian Kong, Hao Chen, J. Chen, Wei Chen, Xiaokun Zhang, Linqi Zong, Jiangyan Wang, Longqing ChenAbstract:The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid Electrolyte-based cells, ultrathin and lightweight solid Electrolytes with high ionic conductivity are desired. However, solid Electrolytes with comparable thicknesses to commercial polymer Electrolyte separators (~10 μm) used in liquid Electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. Here, we report on a polymer–polymer solid-state Electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer Electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10−4 S cm−1 at 30 °C) of the infused polymer Electrolyte. All-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid Electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.
-
vertically aligned and continuous nanoscale ceramic polymer interfaces in composite solid polymer Electrolytes for enhanced ionic conductivity
Nano Letters, 2018Co-Authors: Xiaokun Zhang, Yongji Gong, Hongxia Wang, Yong XiangAbstract:Among all solid Electrolytes, composite solid polymer Electrolytes, comprised of polymer matrix and ceramic fillers, garner great interest due to the enhancement of ionic conductivity and mechanical properties derived from ceramic–polymer interactions. Here, we report a composite Electrolyte with densely packed, vertically aligned, and continuous nanoscale ceramic–polymer interfaces, using surface-modified anodized aluminum oxide as the ceramic scaffold and poly(ethylene oxide) as the polymer matrix. The fast Li+ transport along the ceramic–polymer interfaces was proven experimentally for the first time, and an interfacial ionic conductivity higher than 10–3 S/cm at 0 °C was predicted. The presented composite solid Electrolyte achieved an ionic conductivity as high as 5.82 × 10–4 S/cm at the electrode level. The vertically aligned interfacial structure in the composite Electrolytes enables the viable application of the composite solid Electrolyte with superior ionic conductivity and high hardness, allowin...
J. Chen - One of the best experts on this subject based on the ideXlab platform.
-
Ultrathin, flexible, solid polymer composite Electrolyte enabled with aligned nanoporous host for lithium batteries
Nature Nanotechnology, 2019Co-Authors: Jiayu Wan, Allen Pei, Xian Kong, Feifei Shi, Hao Chen, Zhe Liu, Jin Xie, Kai Liu, Wei Chen, J. ChenAbstract:The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid Electrolyte-based cells, ultrathin and lightweight solid Electrolytes with high ionic conductivity are desired. However, solid Electrolytes with comparable thicknesses to commercial polymer Electrolyte separators (~10 μm) used in liquid Electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. Here, we report on a polymer–polymer solid-state Electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer Electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10−4 S cm−1 at 30 °C) of the infused polymer Electrolyte. All-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid Electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.A nanoporous polyimide film filled with a solid polymer Electrolyte has high ionic conductivity and high mechanical strength. An all-solid-state battery made with an approximately 10-μm-thick film shows good cyclability at 60 °C and no dendrite formation.
-
ultrathin flexible solid polymer composite Electrolyte enabled with aligned nanoporous host for lithium batteries
Nature Nanotechnology, 2019Co-Authors: Xian Kong, Hao Chen, J. Chen, Wei Chen, Xiaokun Zhang, Linqi Zong, Jiangyan Wang, Longqing ChenAbstract:The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid Electrolyte-based cells, ultrathin and lightweight solid Electrolytes with high ionic conductivity are desired. However, solid Electrolytes with comparable thicknesses to commercial polymer Electrolyte separators (~10 μm) used in liquid Electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. Here, we report on a polymer–polymer solid-state Electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer Electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10−4 S cm−1 at 30 °C) of the infused polymer Electrolyte. All-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid Electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.
Martin Dontigny - One of the best experts on this subject based on the ideXlab platform.
-
rechargeable solid state lithium metal batteries with vertically aligned ceramic nanoparticle polymer composite Electrolyte
Nano Energy, 2019Co-Authors: Xue Wang, Haowei Zhai, Boyu Qie, Qian Cheng, James Borovilas, Changmin Shi, Tianwei Jin, Xiangbiao Liao, Martin DontignyAbstract:Abstract Composite solid Electrolytes are attractive as they combine the high ionic conductivity of ceramic nanoparticles and the excellent mechanical properties of polymer Electrolytes. Vertically aligned ceramic nanoparticles in the polymer matrix represent an ideal structure for maximizing ionic conductivity of composite Electrolytes. The ice-templating method was used to build rechargeable solid-state lithium metal batteries with a vertically aligned ceramic/polymer composite Electrolyte composed of high ionic conductivity Li1.5Al0.5Ge1.5(PO4)3 (LAGP) and polyethylene oxide (PEO) polymer. The vertical LAGP walls provide continuous channels for fast ionic transport, while the PEO matrix renders the composite Electrolyte flexible. This solid-state composite Electrolyte has a conductivity of 1.67 × 10−4 S cm−1 at room temperature and 1.11 × 10−3 S cm−1 at 60 °C. LiFePO4 (LFP)/vertically aligned LAGP- PEO/Li full cells were also developed with a high capacity retention of 93.3% after 300 cycles. This study demonstrates the successful application of vertically aligned ceramic/polymer composite Electrolytes for solid-state batteries with high performance.
-
improved Electrolytes for li ion batteries mixtures of ionic liquid and organic Electrolyte with enhanced safety and electrochemical performance
Journal of Power Sources, 2010Co-Authors: Abdelbast Guerfi, Martin Dontigny, Patrick Charest, Michel Petitclerc, Marin Lagace, Ashok K Vijh, Karim ZaghibAbstract:Abstract Physical and electrochemical characteristics of Li-ion battery systems based on LiFePO4 cathodes and graphite anodes with mixture Electrolytes were investigated. The mixed Electrolytes are based on an ionic liquid (IL), and organic solvents used in commercial batteries. We investigated a range of compositions to determine an optimum conductivity and non-flammability of the mixed Electrolyte. This led us to examine mixtures of ILs with the organic Electrolyte usually employed in commercial Li-ion batteries, i.e., ethylene carbonate (EC) and diethylene carbonate (DEC). The IL Electrolyte consisted of (trifluoromethyl sulfonylimide) (TFSI) as anion and 1-ethyl-3-methyleimidazolium (EMI) as the cation. The physical and electrochemical properties of some of these mixtures showed an improvement characteristics compared to the constituents alone. The safety was improved with Electrolyte mixtures; when IL content in the mixture is ≥40%, no flammability is observed. A stable SEI layer was obtained on the MCMB graphite anode in these mixed Electrolytes, which is not obtained with IL containing the TFSI-anion. The high-rate capability of LiFePO4 is similar in the organic Electrolyte and the mixture with a composition of 1:1. The interface resistance of the LiFePO4 cathode is stabilized when the IL is added to the Electrolyte. A reversible capacity of 155 mAh g−1 at C/12 is obtained with cells having at least some organic Electrolyte compared to only 124 mAh g−1 with pure IL. With increasing discharge rate, the capacity is maintained close to that in the organic solvent up to 2 C rate. At higher rates, the results with mixture Electrolytes start to deviate from the pure organic Electrolyte cell. The evaluation of the Li-ion cells; LiFePO4//Li4Ti5O12 with organic and, 40% mixture Electrolytes showed good 1st CE at 98.7 and 93.0%, respectively. The power performance of both cell configurations is comparable up to 2 C rate. This study indicates that safety and electrochemical performance of the Li-ion battery can be improved by using mixed IL and organic solvents.
Xian Kong - One of the best experts on this subject based on the ideXlab platform.
-
Ultrathin, flexible, solid polymer composite Electrolyte enabled with aligned nanoporous host for lithium batteries
Nature Nanotechnology, 2019Co-Authors: Jiayu Wan, Allen Pei, Xian Kong, Feifei Shi, Hao Chen, Zhe Liu, Jin Xie, Kai Liu, Wei Chen, J. ChenAbstract:The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid Electrolyte-based cells, ultrathin and lightweight solid Electrolytes with high ionic conductivity are desired. However, solid Electrolytes with comparable thicknesses to commercial polymer Electrolyte separators (~10 μm) used in liquid Electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. Here, we report on a polymer–polymer solid-state Electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer Electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10−4 S cm−1 at 30 °C) of the infused polymer Electrolyte. All-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid Electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.A nanoporous polyimide film filled with a solid polymer Electrolyte has high ionic conductivity and high mechanical strength. An all-solid-state battery made with an approximately 10-μm-thick film shows good cyclability at 60 °C and no dendrite formation.
-
ultrathin flexible solid polymer composite Electrolyte enabled with aligned nanoporous host for lithium batteries
Nature Nanotechnology, 2019Co-Authors: Xian Kong, Hao Chen, J. Chen, Wei Chen, Xiaokun Zhang, Linqi Zong, Jiangyan Wang, Longqing ChenAbstract:The urgent need for safer batteries is leading research to all-solid-state lithium-based cells. To achieve energy density comparable to liquid Electrolyte-based cells, ultrathin and lightweight solid Electrolytes with high ionic conductivity are desired. However, solid Electrolytes with comparable thicknesses to commercial polymer Electrolyte separators (~10 μm) used in liquid Electrolytes remain challenging to make because of the increased risk of short-circuiting the battery. Here, we report on a polymer–polymer solid-state Electrolyte design, demonstrated with an 8.6-μm-thick nanoporous polyimide (PI) film filled with polyethylene oxide/lithium bis(trifluoromethanesulfonyl)imide (PEO/LiTFSI) that can be used as a safe solid polymer Electrolyte. The PI film is nonflammable and mechanically strong, preventing batteries from short-circuiting even after more than 1,000 h of cycling, and the vertical channels enhance the ionic conductivity (2.3 × 10−4 S cm−1 at 30 °C) of the infused polymer Electrolyte. All-solid-state lithium-ion batteries fabricated with PI/PEO/LiTFSI solid Electrolyte show good cycling performance (200 cycles at C/2 rate) at 60 °C and withstand abuse tests such as bending, cutting and nail penetration.
Xue Wang - One of the best experts on this subject based on the ideXlab platform.
-
rechargeable solid state lithium metal batteries with vertically aligned ceramic nanoparticle polymer composite Electrolyte
Nano Energy, 2019Co-Authors: Xue Wang, Haowei Zhai, Boyu Qie, Qian Cheng, James Borovilas, Changmin Shi, Tianwei Jin, Xiangbiao Liao, Martin DontignyAbstract:Abstract Composite solid Electrolytes are attractive as they combine the high ionic conductivity of ceramic nanoparticles and the excellent mechanical properties of polymer Electrolytes. Vertically aligned ceramic nanoparticles in the polymer matrix represent an ideal structure for maximizing ionic conductivity of composite Electrolytes. The ice-templating method was used to build rechargeable solid-state lithium metal batteries with a vertically aligned ceramic/polymer composite Electrolyte composed of high ionic conductivity Li1.5Al0.5Ge1.5(PO4)3 (LAGP) and polyethylene oxide (PEO) polymer. The vertical LAGP walls provide continuous channels for fast ionic transport, while the PEO matrix renders the composite Electrolyte flexible. This solid-state composite Electrolyte has a conductivity of 1.67 × 10−4 S cm−1 at room temperature and 1.11 × 10−3 S cm−1 at 60 °C. LiFePO4 (LFP)/vertically aligned LAGP- PEO/Li full cells were also developed with a high capacity retention of 93.3% after 300 cycles. This study demonstrates the successful application of vertically aligned ceramic/polymer composite Electrolytes for solid-state batteries with high performance.
