Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite Electrolyte
The flexible Li‐ion conducting solid polymer electrolyte (SPE) endows a stable long‐term cycling to Li‐metal anode to significantly improve the energy density of solid‐state lithium batteries; however, the practical application of the SPE is limited by its low ionic conductivity and small critical c...
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| Format: | Article |
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Wiley-VCH
2024-12-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202400312 |
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| author | Lu Gao Yuqi Luo Chao Liu Huayang Tian Weimin Kang Weidong Zhou Quanxiang Li |
| author_facet | Lu Gao Yuqi Luo Chao Liu Huayang Tian Weimin Kang Weidong Zhou Quanxiang Li |
| author_sort | Lu Gao |
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| description | The flexible Li‐ion conducting solid polymer electrolyte (SPE) endows a stable long‐term cycling to Li‐metal anode to significantly improve the energy density of solid‐state lithium batteries; however, the practical application of the SPE is limited by its low ionic conductivity and small critical current density for dendrite nucleation. Herein, Li+‐doped porous ZnO (LZO) nanosheets are introduced into the poly(ethylene oxide) (PEO)‐based SPE, releasing more mobile Li ions for faster Li‐ion transport due to the enhanced interaction between abundant oxygen vacancies and anions of Li‐salt. As a result, the optimized LZO/PEO composite polymer electrolyte exhibits a high Li‐ion conductivity of 3.3 × 10−4 S cm−1 at 50 °C, 4 times higher than the pure PEO electrolyte. The solid‐state LiFePO4/Li cell shows extraordinarily long‐term stable cycling, up to 1500 cycles with a high average Coulombic efficiency of 99.8%. In addition, the cycling stability of the high‐voltage LiNi0.8Mn0.1Co0.1O2 (NMC811)/Li cell was also obviously improved compared to the nondoped pure PEO electrolyte, indicating the positive contribution of the LZO on interfacial stability. |
| format | Article |
| id | doaj-art-2a4579437c384848b41fdaaf12c7b309 |
| institution | OA Journals |
| issn | 2688-4062 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley-VCH |
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| series | Small Structures |
| spelling | doaj-art-2a4579437c384848b41fdaaf12c7b3092025-08-20T02:19:33ZengWiley-VCHSmall Structures2688-40622024-12-01512n/an/a10.1002/sstr.202400312Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite ElectrolyteLu Gao0Yuqi Luo1Chao Liu2Huayang Tian3Weimin Kang4Weidong Zhou5Quanxiang Li6State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering Tiangong University Tianjin 300387 P. R. ChinaState Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering Tiangong University Tianjin 300387 P. R. ChinaInstitute for Frontier Materials Deakin University, Waurn Ponds Campus Locked Bag 20000 Geelong Victoria 3220 AustraliaDepartment State Key Laboratory of Organic‐Inorganic Composites Department of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 ChinaState Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering Tiangong University Tianjin 300387 P. R. ChinaDepartment State Key Laboratory of Organic‐Inorganic Composites Department of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 ChinaInstitute for Frontier Materials Deakin University, Waurn Ponds Campus Locked Bag 20000 Geelong Victoria 3220 AustraliaThe flexible Li‐ion conducting solid polymer electrolyte (SPE) endows a stable long‐term cycling to Li‐metal anode to significantly improve the energy density of solid‐state lithium batteries; however, the practical application of the SPE is limited by its low ionic conductivity and small critical current density for dendrite nucleation. Herein, Li+‐doped porous ZnO (LZO) nanosheets are introduced into the poly(ethylene oxide) (PEO)‐based SPE, releasing more mobile Li ions for faster Li‐ion transport due to the enhanced interaction between abundant oxygen vacancies and anions of Li‐salt. As a result, the optimized LZO/PEO composite polymer electrolyte exhibits a high Li‐ion conductivity of 3.3 × 10−4 S cm−1 at 50 °C, 4 times higher than the pure PEO electrolyte. The solid‐state LiFePO4/Li cell shows extraordinarily long‐term stable cycling, up to 1500 cycles with a high average Coulombic efficiency of 99.8%. In addition, the cycling stability of the high‐voltage LiNi0.8Mn0.1Co0.1O2 (NMC811)/Li cell was also obviously improved compared to the nondoped pure PEO electrolyte, indicating the positive contribution of the LZO on interfacial stability.https://doi.org/10.1002/sstr.202400312composite polymer electrolytescritical current densityoxygen vacanciesporous nanosheetssolid‐state batteries |
| spellingShingle | Lu Gao Yuqi Luo Chao Liu Huayang Tian Weimin Kang Weidong Zhou Quanxiang Li Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite Electrolyte Small Structures composite polymer electrolytes critical current density oxygen vacancies porous nanosheets solid‐state batteries |
| title | Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite Electrolyte |
| title_full | Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite Electrolyte |
| title_fullStr | Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite Electrolyte |
| title_full_unstemmed | Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite Electrolyte |
| title_short | Porous Lithium‐Doped ZnO Nanosheets with Abundant Oxygen Vacancies for Accelerating Li+ Transport in Solid‐State Composite Electrolyte |
| title_sort | porous lithium doped zno nanosheets with abundant oxygen vacancies for accelerating li transport in solid state composite electrolyte |
| topic | composite polymer electrolytes critical current density oxygen vacancies porous nanosheets solid‐state batteries |
| url | https://doi.org/10.1002/sstr.202400312 |
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