结晶度
电解质
材料科学
化学工程
离子电导率
锂(药物)
电化学
纳米棒
快离子导体
化学
纳米技术
电极
物理化学
工程类
内分泌学
医学
复合材料
作者
Zhihao Guo,Yuqi Wu,Xinhai Li,Xianwen Wu,Qiyang Hu,Zhixing Wang,Huajun Guo,Wenjie Peng,Guochun Yan,Jiexi Wang
出处
期刊:Ionics
[Springer Nature]
日期:2021-11-05
卷期号:28 (2): 779-788
被引量:2
标识
DOI:10.1007/s11581-021-04291-8
摘要
Employing the solid polymer electrolyte (SPE) instead of traditional liquid electrolyte is an effective way to develop high safety and high-energy density solid-state lithium batteries. Herein, for the first time, the Ni3B2O3 (NBO) nanorods are incorporated into polyethylene oxide (PEO)-based SPE. Particularly, the optimized NBO-embedded SPE shows a high ionic conductivity of 8.5 × 10−5 S cm−1 at 30 °C, lowering the operating temperature of PEO-based SPE substantially. The corresponding LiFePO4/Li battery demonstrates a high discharge capacity of 154 mAh g−1 after 80 cycles at 0.2 C under 30 °C, with favorable capacity retention of 97.5%. The remarkable properties are attributed to the high ionic conductivity of modified SPE at ambient temperature, which is resulted from the decreased crystallinity and melting transition point, increased movement of PEO chain, and promotion of lithium salt dissociation, as well as the formation of the lithium ion migrating pathway on the interface between PEO and NBO nanorods.
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