期刊
ADVANCED ENERGY MATERIALS
卷 9, 期 13, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201803854
关键词
composite polymer electrolytes; dendrite-free; lithium metal batteries; viscoelastic and nonflammable interfaces
类别
资金
- National Key RAMP
- D Program of China [2016YFA0202500]
- National Natural Science Foundation of China [51772093, 51803054]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA 21070300]
Herein, a composite polymer electrolyte with a viscoelastic and nonflammable interface is designed to handle the contact issue and preclude Li dendrite formation. The composite polymer electrolyte (cellulose acetate/polyethylene glycol/Li1.4Al0.4Ti1.6P3O12) exhibits a wide electrochemical window of 5 V (vs Li+/Li), a high Li+ transference number of 0.61, and an excellent ionic conductivity of above 10(-4) S cm(-1) at 60 degrees C. In particular, the intimate contact, low interfacial impedance, and fast ion-transport process between the electrodes and solid electrolytes can be simultaneously achieved by the viscoelastic and nonflammable layer. Benefiting from this novel design, solid lithium metal batteries with either LiFePO4 or LiCoO2 as cathode exhibit superior cyclability and rate capability, such as a discharge capacity of 157 mA h g(-1) after 100 cycles at C/2 and 97 mA h g(-1) at 5C for LiFePO4 cathode. Moreover, the smooth and uniform Li surface after long-term cycling confirms the successful suppression of dendrite formation. The viscoelastic and nonflammable interface modification of solid electrolytes provides a promising and general strategy to handle the interfacial issues and improves the operative safety of solid lithium metal batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据