期刊
NANO ENERGY
卷 72, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2020.104655
关键词
Lithium metal batteries; Surface passivation; Poly (ethylene oxide); High-voltage cathode; Energy density
类别
资金
- China Scholarship Council [201706010086]
- National Natural Science Foundation of China [51774016]
- Scientific Data and Computing Center, a component of the Computational Science Initiative, at Brookhaven National Laboratory [DE-SC0012704]
- Battery500 Consortium [DE-SC0012704]
- DOE Office of Science [DE-SC0012704]
Poly (ethylene oxide) (PEO) polymer electrolytes are promising candidates for next-generation rechargeable lithium batteries. However, the poor interfacial stability between 4 V cathodes and PEO electrolytes impedes their applications in 4 V lithium batteries with high energy density. Here, we demonstrate a facile and effective strategy to enhance the interfacial stability by the synergy of Li1.5Al0.5Ge1.5(PO4)(3) (LAGP) coating on the cathode surface, and salt combination in the electrolyte, even with a cut-off voltage of 4.25-4.4 V vs. Li+/Li. Nano-LAGP coated Li vertical bar PEO vertical bar LiCoO2 cell delivers stable cycling with a capacity retention of 81.9%/400 cycles and 84.7%/200 cycles at 60 degrees C when charged to 4.25 and 4.3 V in pure polyether electrolyte, respectively. Steady cycling is also demonstrated at room temperature and with LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode. This work offers a viable and scalable approach to improve the stability between PEO electrolytes and 4 V cathodes and open up new possibilities for practical application of 4 V 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