电解质
材料科学
阳极
电化学
化学工程
聚合物
金属
极化(电化学)
电池(电)
聚合
金属锂
电极
表面改性
锂(药物)
复合材料
化学
冶金
物理化学
工程类
医学
功率(物理)
物理
量子力学
内分泌学
作者
Yulong Liu,Qingyang Mei,Yutong Zhai,Yulong Liu
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2024-05-28
卷期号:35 (33): 335401-335401
标识
DOI:10.1088/1361-6528/ad49ad
摘要
Abstract Li metal batteries with polymer electrolyte are of great interest for next-generation batteries for high safety and high energy density. However, uneven deposition on the lithium metal surface can greatly affect battery life. Therefore, surface modification on the Li metal become necessary to achieve good performance. Herein, an artificial solid electrolyte interface (SEI) modified lithium metal anode is prepared using cation-polymerization process, as triggered by PF 5 generated from CsPF 6 . As a result, the polarization voltage of Li||Li symmetric battery assembled with artificial SEI-modified Li metal anode was stable with a small over-potential of 25 mV after 3000 h at current density of 1.5 mA cm −2 . Electrochemical performance of Li||NCM 622 (LiNi 0.6 Co 0.2 Mn 0.2 O 2 ) full cell with soft-matter polymer electrolyte is significantly improved than bare Li-metal, the capacity retention is 75% after 120 cycles with N/P = 3:1 at a cut-off voltage of 4.3 V. Our work has shed lights on the commercialization of Li metal battery with polymer electrolyte.
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