A novel Mo_(8.7)Nb_(6.1)O_x@NCs egg-nest composite structure as superior anode material for lithium-ion storage  

作　　者：Shu-Ling Cheng Xiu-Ping Yin Samrat Sarkar Zhen-Wei Wang Qiu-An Huang Jiu-Jun Zhang Yu-Feng Zhao 

机构地区：[1]School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai,201418,China [2]Institute for Sustainable Energy and College of Sciences,Shanghai University,Shanghai,200444,China

出　　处：《Rare Metals》2022年第8期2645-2654,共10页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.22179077 and 51774251);Shanghai Science and Technology Commission’s "2020 Science and Technology Innovation Action Plan" (No. 20511104003);Natural Science Foundation in Shanghai (No. 21ZR1424200);Hebei Natural Science Foundation for Distinguished Young Scholars (No.B2017203313);the Scientific Research Foundation for the Returned Overseas Chinese Scholars (No. CG2014003002)

摘　　要：Anode materials of lithium-ion batteries(LIBs)endowed with high-rate performance and fast charging capability are crucial for future energy storage systems.Here,Mo_(8.7)Nb_(6.1)O_(x)@NCs(nitrogen-doped carbon nanotubes,NCs)egg-nest structure synthesized by an in-situ solvothermal method is reported.The Mo_(8.7)Nb_(6.1)O_(x)@NCs egg-nest exhibits high embedding potential,high pseudocapacitance contribution rate(87.5%),and low charge transfer resistance.The electrochemical results show that Mo_(8.7)Nb_(6.1)O_(x)@NCs demonstrates excellent rate performance(reversible capacity of 196.8 mAh·Ag^(-1)at 10 A·Ag^(-1),and full charging only takes 1.1 min)and excellent cycle stability(reversible capacity of 513 mAh·Ag^(-1)at 0.5 A·Ag^(-1)combined with a capacity loss of only 5.4%after 100 cycles),outperforming the state-of-the-art literature.The full cell is assembled with Mo_(8.7)Nb_(6.1)O_(x)@NCs as the anode and LiFeP04 as the cathode,which can provide a remarkably high energy density of 731.9 Wh·kg^(-1),indicating its excellent prospect for practical applications.

关 键 词：Niobium molybdenum oxide Fast charging Anode material High-rate Lithium-ion batteries 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]