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Natural Soft/Rigid Superlattices as Anodes for High-Performance Lithium-Ion Batteries
Authors
Wei Bai
Jingyu Gao
+9 more
Zaiping Guo
Kun Li
Pengju Li
Shengyong Qin
Gongrui Wang
Chong Xiao
Yi Xie
Genqiang Zhang
Tengfei Zhou
Publication date
1 January 2020
Publisher
'Sociological Research Online'
Abstract
© 2020 Wiley-VCH GmbH Volume expansion and poor conductivity are two major obstacles that hinder the pursuit of the lithium-ion batteries with long cycling life and high power density. Herein, we highlight a misfit compound PbNbS3 with a soft/rigid superlattice structure, confirmed by scanning tunneling microscopy and electrochemical characterization, as a promising anode material for high performance lithium-ion batteries with optimized capacity, stability, and conductivity. The soft PbS sublayers primarily react with lithium, endowing capacity and preventing decomposition of the superlattice structure, while the rigid NbS2 sublayers support the skeleton and enhance the migration of electrons and lithium ions, as a result leading to a specific capacity of 710 mAh g−1 at 100 mA g−1, which is 1.6 times of NbS2 and 3.9 times of PbS. Our finding reveals the competitive strategy of soft/rigid structure in lithium-ion batteries and broadens the horizons of single-phase anode material design
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Last time updated on 19/11/2020