High lithiophilic nitrogen-doped carbon nanotube arrays prepared by in-situ catalyze for lithium metal anode  

作　　者：Chenyang Zhao Xiaoju Yin Zhikun Guo Dan Zhao Guiye Yang Aosai Chen Lishuang Fan Yu Zhang Naiqing Zhang 

机构地区：[1]State Key Laboratory of Urban Water Resource and Environment,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China [2]Academy of Fundamental and Interdisciplinary Sciences,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Chinese Chemical Letters》2021年第7期2254-2258,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21646012);the State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(No.2019DX13);China Postdoctoral Science Foundation(Nos.2016M600253,2017T100246);the Post-doctoralFoundation of Heilongjiang Province(No.LBH-Z16060);the Fundamental Research Funds for the Central Universities(No.HIT.NSRIF.201836)。

摘　　要：Lithium metal has a very outstanding theoretical capacity(3860 mAh/g)and is one of the most superior anode materials for high energy density batteries.However,the uncontrollable dendrite growth and the fo rmation of"dead lithium"are the important hidden dangers of short cycle life and low safety.However,the uncontrollable dendrite growth and the fo rmation of dead lithium leads to short cycle life and hidden dange r,which hinder its practical application.Controlling the nucleation and growth process of lithium is an effective strategy to inhibit lithium dendrite.Herein,a simple in situ self-catalytic method is used to construct nitrogen doped carbon nanotube arrays on stainless steel mesh(N-CNT@SS)as a lithium composite anode.The N-doped CNTs provide a great number of N-functional groups,which enhance the lithiophilic of anode and provide a large number of uniform nucleation sites,hence it has excellent structural stability for cycles.The arrays provide neat lithium-ion transport channels to uniform lithiumion flux and inhibits dendrite generation,revealed by the COMSOL multi-physics concentration field simulation.The N-CNT@SS composite anode sustain stable at 98.9%over 300 cycles at 1 mA/cm2.NCNT@SS as the anode is coupled LiFePO_(4)(LFP)as the cathode construct a full battery,demonstrating excellent cycling stability with a capacity of 152.33 mAh/g and capacity retaining ratio of 95.4%after 100 cycles at 0.5 C.

关 键 词：Lithium metal batteries Nitrogen doped carbon nanotubes Stainless steel mesh COMSOL multi-physics concentration field Simulation Lithiophilic anode 

分 类 号：TM912[电气工程—电力电子与电力传动] O643.36[理学—物理化学]