| Autor: |
ZHANG Kun, LIU Na, TIAN Jun, LIANG Xiaoqiang, CHEN Guanghai, GAO Hongbo, HU Daozhong, TONG Lei, TIAN Cuijun, WANG Haochen |
| Jazyk: |
čínština |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Cailiao gongcheng, Vol 52, Iss 6, Pp 69-77 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1001-4381 |
| DOI: |
10.11868/j.issn.1001-4381.2023.000768 |
| Popis: |
The diblock copolymer electrolyte PEGMEMAm-GMAn-Br （PGA-Br）， a copolymer of poly（ethylene glycol methyl ether methacrylate） （PEGMEMA）， and glycidyl methacrylate （GMA） were synthesised by designing the molecular structure of the polymer and using thermally-initiated free-radical polymerisation. The electrochemical performance were investigated. The results show that the ionic conductivity of polymer electrolyte is improved by PGA block or grafting on polymer electrolyte， and the ionic conductivity at room temperature reaches 1.05×10-4 S·cm-1. At the same time， PGA-Br block copolymer electrolytes exhibit a low glass transition temperature （-65 ℃）， a high thermal decomposition temperature， an electrochemical stability window of up to 5.1 V， and flame-retardant property. The Li|Li symmetrical solid-state battery assembled with PGA-Br copolymer electrolyte exhibits an enhanced electrode/electrolyte solid-solid interface， which can achieve uniform deposition of lithium metal and effectively inhibit the lithium dendrites growth. The LiNi0.8Co0.1Mn0.1O2 （NCM811） |PGA-Br|Li solid-state battery based on PGA-Br block copolymer electrolyte can achieve a high first cycle discharge specific capacity of 160.1 mAh/g at 0.1 C， and the capacity retention rate is as high as 91.5% after 100 cycles， and with a stable Coulombic efficiency of over 98.5%. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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