材料科学
电解质
锂(药物)
电化学
过电位
电化学窗口
X射线光电子能谱
电池(电)
傅里叶变换红外光谱
储能
化学工程
电极
离子电导率
物理化学
内分泌学
功率(物理)
工程类
化学
物理
医学
量子力学
作者
Ziyue Wen,Zhikun Zhao,Li Li,Zhaoyang Sun,Nan Chen,Yuejiao Li,Feng Wu,Renjie Chen
标识
DOI:10.1002/adfm.202109184
摘要
Abstract Solid‐state batteries are considered a new avenue for storing high‐energy and safe electrochemical energy in both traditional and niche applications. However, the inferior tolerance under high voltage as well as poor interfacial contact has become the bottleneck for its application in high‐energy‐density Li metal batteries (LMBs). Herein, a bisalt polyether electrolyte (BSPE) is designed via in situ polymerization process for quasi‐solid LMBs. In particular, the BSPE exhibited a wide electrochemical stability window (4.4 V versus Li + /Li), and in situ Fourier transform infrared spectrocopy combined with X‐ray photoelectron spectroscopy technology revealed the oxidation mechanism of BSPE at high voltage. Benefiting from this design, the Li|Li symmetric cells with BSPE are stable over 1200 h with low overpotential. Additionally, Li|LiFePO 4 (LFP), Li|Li 4 Ti 5 O 12 (LTO), and Li|LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) LMBs delivered excellent cycling performance at ambient temperature. Therefore, it is believed that the BSPE can be a promising gel polymer electrolyte candidate for high‐energy‐density LMBs.
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