Porous membrane with improved dendrite resistance for high-performance lithium metal-based battery

被引:80
作者
Hussain, Arshad [1 ,2 ]
Li, Dan [1 ,2 ]
Luo, Yang [1 ,2 ]
Zhang, Hongzhang [1 ]
Zhang, Huamin [1 ]
Li, Xianfeng [1 ]
机构
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian Natl Lab Clean Energy DNL, 457 Zhongshan Rd, Dalian 116023, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium-ion battery; Polybenzimidazole; Porous membrane; Tuneable morphology; BIFUNCTIONAL SEPARATOR; ELECTROLYTE-SOLUTIONS; ANODE; STABILITY; LIFE; SAFE;
D O I
10.1016/j.memsci.2020.118108
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Lithium metal is one of the most promising anode materials for next-generation power batteries because of its high energy density and low reduction potential. Unfortunately, uncontrolled Li dendrite growth during cycling leads to an unstable interface, a limited cycling life, and a low Coulombic efficiency, further results in severe capacity decay and safety issues. To address these problems, an effective approach is proposed to realize uniform Li nucleation. Herein, we demonstrate a thermally stable polybenzimidazole (PBI) polymer for making porous membranes with a tuneable morphology via a versatile non-solvent treatment method for Lithium-ion battery's (LIBs) application. The final morphology of PBI membranes is controlled by selecting the appropriate non-solvent and an optimized performance could also be obtained. Notably, our functional porous PBI membrane with abundant polar amine functional groups could enable dendrite-free Li deposition, showing stable and low overpotential cycling durability for 400 h at a current density of 1 mA cm(-2). With such a membrane, the LiFePO4/Li cell shows superior cycle stability and rate performance, which are higher than those of commercial PE separators. Remarkably, this work offers a simple and facile method to prepare advance porous membranes for lithium-ion batteries with improved dendrite resistance.
引用
收藏
页数:10
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