Construction of truncated-octahedral LiMn2O4 for battery-like electrochemical lithium recovery from brine  

作　　者：Guolang Zhou Linlin Chen Xiaowei Li Guiling Luo Zhendong Yu Jingzhou Yin Lei Fan Yanhong Chao Lei Jiang Wenshuai Zhu 

机构地区：[1]School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang,212013,Jiangsu,China [2]School of Pharmacy,Jiangsu University,Zhenjiang,212013,Jiangsu,China [3]School of Chemistry and Chemical Engineering,Huaiyin Normal University,Huai'an,223001,Jiangsu,China [4]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou,225002,Jiangsu,China [5]Jiangsu Topfine New Materials Science&Technology Co.,Ltd.,Zhenjiang,212013,Jiangsu,China

出　　处：《Green Energy & Environment》2023年第4期1081-1090,共10页绿色能源与环境（英文版）

基　　金：supported by the National Natural Science Foundation of China (21878133,21908082,22178154);the Natural Science Foundation of Jiangsu Province(BK20190854);the China Postdoctoral Science Foundation(2020M671364,2021M701472);the Science&Technology Foundation of Zhenjiang (GY2020027)。

摘　　要：The extraction of lithium from salt lakes or seawater has attracted worldwide attention because of the explosive growth of global demand for lithium products. The LiMn_(2)O_(4)-based electrochemical lithium recovery system is one of the strongest candidates for commercial application due to its high inserted capacity and low energy consumption. However, the surface orientation of LiMn_(2)O_(4)that facilitates Li diffusion happens to be prone to manganese dissolution making it a great challenge to obtain high lithium inserted capacity and long life simultaneously. Herein, we address this problem by designing a truncated octahedral LiMn_(2)O_(4)(Tr-oh LMO) in which the dominant(111) facets minimize Mn dissolution while a small portion of(100) facets facilitate the Li diffusion. Thus, this Tr-oh LMO-based electrochemical lithium recovery system shows excellent Li recovery performance with high inserted capacity(20.25 mg g^(-1)per cycle) in simulated brine. In addition, the dissolution rate of manganese per 30 cycles is only 0.44% and the capacity maintained 85% of the initial after 30 cycles. These promising findings accelerate the practical application of LiMn_(2)O_(4)in electrochemical lithium recovery.

关 键 词：LiMn_(2)O_(4) Crystal facets Electrochemistry Lithium recovery BRINE 

分 类 号：TS396.5[轻工技术与工程]