MoC/C nanowires as high-rate and long cyclic life anode for lithium ion batteries

作者:Deng, MD (Deng, Mengdie)^[1 ]; Qi, J (Qi, Jun)^[2 ]; Li, X (Li, Xiang)^[2 ]; Xiao, YL (Xiao, Yongle)^[1 ]; Yang, LC (Yang, Lichun)^[2 ]; Yu, X (Yu, Xiang)^[1 ]; Wang, H (Wang, Hui)^[2 ]; Yuan, B (Yuan, Bin)^[2 ]; Gao, QS (Gao, Qingsheng)^[1 ]

Transition metal carbides as promising anode materials for lithium ion batteries (LIBs) have attracted wide attention due to their high conductivity and high capacity. In this work, we have developed MoC/C nanowires as anode materials with high capacity and excellent cyclic stability. These nanowires are featured by a mesoporous structure resulting from stacking of carbon coated MoC nanocrystals. This structure provides shortened paths for Li+ diffusion and freeways for electron transfer, moreover, it effectively relieves the volume change of MoC nanocrystallites during the discharge/ charge cycles. Therefore, the MoC/C nanowires exhibit excellent cyclic stability even at high current densities. At 0.2 A g(-1), they perform reversible capacity of 650.3 mAh g(-1) after 350 cycles, with capacity retention of 93.4%. Even at a high current density of 2 A g(-1), they maintain 455.4 mAh g(-1) after 2000 cycles, with average capacity loss rate of only 0.004% per cycle. The high capacity and outstanding stability indicate the potential of the MoC/C nanowires as anode materials for high performance LIBs. (C) 2018 Elsevier Ltd. All rights reserved.

作者关键词:Lithium ion batteries; Anode materials; Transition metal carbides; Nanowires; Carbon hybridization

KeyWords Plus:HYDROGEN EVOLUTION REACTION; EFFICIENT ELECTROCATALYSTS; CARBIDE NANOPARTICLES; GRAPHITIC CARBON; HIGH-CAPACITY; STORAGE; PERFORMANCE; SPHERES; GRAPHENE; HETERONANOWIRES

通讯作者地址:Gao, QS (通讯作者)

Jinan Univ, Dept Chem, Guangzhou 510632, Guangdong, Peoples R China.   增强组织信息的名称     Jinan University

South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

地址:

	[ 1 ] Jinan Univ, Dept Chem, Guangzhou 510632, Guangdong, Peoples R China   增强组织信息的名称     Jinan University
	[ 2 ] South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology

电子邮件地址:mslcyang@scut.edu.cn; tqsgao@jnu.edu.cn

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