材料科学
电解质
阳极
电化学
钠
聚合物
电池(电)
储能
化学工程
复合材料
快离子导体
韧性
功率密度
氧化物
冶金
电极
功率(物理)
物理
量子力学
化学
物理化学
工程类
作者
Jing Suo,Yaya Jia,Xinxin Zhu,Shan Liu,Xianjian Tang,Feng Liang,Ling Wang,Jun Lü
标识
DOI:10.1002/adma.202409587
摘要
Abstract Solid sodium metal batteries (SSMBs) offer an alternative promising power source for electrochemical energy storage due to their high energy density and high safety. However, the inherent sodium dendrite growth and poor mechanical properties of electrolytes seriously limit their application. Herein, a network structure composed of polyethylene oxide‐based composite polymer electrolyte (CPE) is designed with liquid metal nanoparticles (LM) for SSMBs, in which LM can move in the solid electrolyte with the electric field driven. This effect can facilitate the inactivated sodium return to the metal sodium anode, and alloy with dendrites at the same time, which is beneficial for inhibiting the growth of dendrites. The symmetric cell with the CPE containing LM achieves good cyclic stability of more than 1800 and 800 h at 0.1 and 0.2 mA cm −2 , respectively. The energy density of the pouch battery can reach 230 Wh kg −1 . In sum, LM presents great potential to be employed as a performance reinforcement filler for CPEs, which paves the way for achieving high‐performance SSMBs.
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