期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 12, 页码 6832-6839出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00560a
关键词
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资金
- China Postdoctoral Science Foundation [2017M620771]
- National Nature Science Foundation of China [51872157]
- Shenzhen Technical Plan Project [JCYJ20170817161753629, KQJSCX20160226191136, JCYJ20170412170911187]
- Guangdong Technical Plan Project [2015TX01N011]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01N111]
Polymer electrolytes have attracted great attention due to their promising abilities, however, only on further improving their safety and electrochemical performance can they be used as next generation electrolytes. Here, a novel composite polymer electrolyte (CPE) with nano-SiO2 acting as a cross-linking agent to form a 3D cross-linked network was synthesized to improve the electrochemical stability and mechanical ability. The novel CPE exhibited some excellent properties such as high ionic conductivity (4.65 x 10(-3) S cm(-1) at room temperature) with a broad electrochemical stability window (approximate to 5.4 V vs. Li/Li+), high ionic transfer number (0.45), high mechanical robustness and flexibility (Young's module approximate to 8.9 MPa, breaking strain 181%), and excellent interface stability. The lithium metal battery LiFePO4/CPE/Li was assembled and delivered a specific capacity of 160 mA h g(-1) with a capacity retention of above 90% after 500 cycles at 1C. Furthermore, to cooperate with high voltage cathode materials LiNi0.8Co0.1Mn0.1O2 and LiNi0.5Mn1.5O4, the novel CPE still delivered superior cycling performance compared to traditional electrolytes.
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