Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteries
Abstract Solid‐state Li metal battery has attracted increasing interests for its potentially high energy density and excellent safety assurance, which is a promising candidate for next generation battery system. However, the low ionic conductivity and Li+ transport number of solid‐state polymer elec...
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Wiley
2024-11-01
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| Online Access: | https://doi.org/10.1002/inf2.12613 |
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| author | Ziyang Liang Chang Liu Xiang Bai Jiahui Zhang Xinyue Chang Lixiang Guan Tiantian Lu Huayun Du Yinghui Wei Qian Wang Tao Wei Wen Liu Henghui Zhou |
| author_facet | Ziyang Liang Chang Liu Xiang Bai Jiahui Zhang Xinyue Chang Lixiang Guan Tiantian Lu Huayun Du Yinghui Wei Qian Wang Tao Wei Wen Liu Henghui Zhou |
| author_sort | Ziyang Liang |
| collection | DOAJ |
| description | Abstract Solid‐state Li metal battery has attracted increasing interests for its potentially high energy density and excellent safety assurance, which is a promising candidate for next generation battery system. However, the low ionic conductivity and Li+ transport number of solid‐state polymer electrolytes limit their practical application. Herein, a composite polymer electrolyte with self‐inserted structure is proposed using the layered double hydroxides (LDHs) as dopant to achieve a fast Li+ transport channel in poly(vinylidene‐co‐trifluoroethylene) [P(VDF‐TrFE)] based polymer electrolyte. In such a composite electrolyte, P(VDF‐TrFE) polymer has an all‐trans conformation, in which all fluorine atoms locate on one side of the polymer chain, providing fast Li+ transport highways. Meanwhile, the LDH can immobilize the anions of Li salts based on the electrostatic interactions, promoting the dissociation of Li salts, thereby enhancing the ionic conductivity (6.4 × 10−4 S cm−1) and Li+ transference number (0.76). The anion immobilization effect can realize uniform electric field distribution at the anode surface and suppress the dendritic Li growth. Moreover, the hydrogen bonding interaction between LDH and polymer chains also endows the composite electrolyte with strong mechanical properties. Thus, at room temperature, the Li || Li symmetric cells can be stably cycled over 1000 h at a current density of 0.2 mA cm−2, and the full cells with LiFePO4 cathode deliver a high capacity retention (>95%) after 200 cycles. This work offers a promising route to construct solid‐state polymer electrolytes with fast Li+ transport. |
| format | Article |
| id | doaj-art-98b09f73d071434c83b0fb787aa3fcf3 |
| institution | Kabale University |
| issn | 2567-3165 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | InfoMat |
| spelling | doaj-art-98b09f73d071434c83b0fb787aa3fcf32024-11-22T03:27:23ZengWileyInfoMat2567-31652024-11-01611n/an/a10.1002/inf2.12613Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteriesZiyang Liang0Chang Liu1Xiang Bai2Jiahui Zhang3Xinyue Chang4Lixiang Guan5Tiantian Lu6Huayun Du7Yinghui Wei8Qian Wang9Tao Wei10Wen Liu11Henghui Zhou12College of Materials Science and Engineering Taiyuan University of Technology Taiyuan Shanxi the People's Republic of ChinaCollege of Materials Science and Engineering Taiyuan University of Technology Taiyuan Shanxi the People's Republic of ChinaShanxi Energy Internet Research Institute Taiyuan Shanxi the People's Republic of ChinaShanxi Energy Internet Research Institute Taiyuan Shanxi the People's Republic of ChinaShanxi Energy Internet Research Institute Taiyuan Shanxi the People's Republic of ChinaCollege of Materials Science and Engineering Taiyuan University of Technology Taiyuan Shanxi the People's Republic of ChinaCollege of Materials Science and Engineering Taiyuan University of Technology Taiyuan Shanxi the People's Republic of ChinaCollege of Materials Science and Engineering Taiyuan University of Technology Taiyuan Shanxi the People's Republic of ChinaCollege of Materials Science and Engineering Taiyuan University of Technology Taiyuan Shanxi the People's Republic of ChinaCollege of Materials Science and Engineering Taiyuan University of Technology Taiyuan Shanxi the People's Republic of ChinaSchool of Energy and Power Jiangsu University of Science and Technology Zhenjiang the People's Republic of ChinaState Key Lab of Chemical Resource Engineering College of Science and College of Energy Beijing University of Chemical Technology Beijing the People's Republic of ChinaCollege of Chemistry and Molecular Engineering Peking University Beijing the People's Republic of ChinaAbstract Solid‐state Li metal battery has attracted increasing interests for its potentially high energy density and excellent safety assurance, which is a promising candidate for next generation battery system. However, the low ionic conductivity and Li+ transport number of solid‐state polymer electrolytes limit their practical application. Herein, a composite polymer electrolyte with self‐inserted structure is proposed using the layered double hydroxides (LDHs) as dopant to achieve a fast Li+ transport channel in poly(vinylidene‐co‐trifluoroethylene) [P(VDF‐TrFE)] based polymer electrolyte. In such a composite electrolyte, P(VDF‐TrFE) polymer has an all‐trans conformation, in which all fluorine atoms locate on one side of the polymer chain, providing fast Li+ transport highways. Meanwhile, the LDH can immobilize the anions of Li salts based on the electrostatic interactions, promoting the dissociation of Li salts, thereby enhancing the ionic conductivity (6.4 × 10−4 S cm−1) and Li+ transference number (0.76). The anion immobilization effect can realize uniform electric field distribution at the anode surface and suppress the dendritic Li growth. Moreover, the hydrogen bonding interaction between LDH and polymer chains also endows the composite electrolyte with strong mechanical properties. Thus, at room temperature, the Li || Li symmetric cells can be stably cycled over 1000 h at a current density of 0.2 mA cm−2, and the full cells with LiFePO4 cathode deliver a high capacity retention (>95%) after 200 cycles. This work offers a promising route to construct solid‐state polymer electrolytes with fast Li+ transport.https://doi.org/10.1002/inf2.12613LDHLi metal batteriesLi+ transport channelP(VDF‐TrFE)solid‐state polymer electrolytes |
| spellingShingle | Ziyang Liang Chang Liu Xiang Bai Jiahui Zhang Xinyue Chang Lixiang Guan Tiantian Lu Huayun Du Yinghui Wei Qian Wang Tao Wei Wen Liu Henghui Zhou Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteries InfoMat LDH Li metal batteries Li+ transport channel P(VDF‐TrFE) solid‐state polymer electrolytes |
| title | Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteries |
| title_full | Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteries |
| title_fullStr | Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteries |
| title_full_unstemmed | Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteries |
| title_short | Composite electrolyte with self‐inserted structure and all‐trans F conformation provides fast Li+ transport for solid‐state Li metal batteries |
| title_sort | composite electrolyte with self inserted structure and all trans f conformation provides fast li transport for solid state li metal batteries |
| topic | LDH Li metal batteries Li+ transport channel P(VDF‐TrFE) solid‐state polymer electrolytes |
| url | https://doi.org/10.1002/inf2.12613 |
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