NiCo2S4 Nanocrystals on Nitrogen-Doped Carbon Nanotubes as High-Performance Anode for Lithium-Ion Batteries

Nanoscale Research Letters

Zhumabay Bakenov¹  Gulnur Kalimuldina²  Yanli Song³  Haisheng Han³  Yongguang Zhang³ 

[1] Department of Chemical and Materials Engineering, National Laboratory Astana, Nazarbayev University, 010000, Nur-Sultan, Kazakhstan;Department of Mechanical and Aerospace Engineering, Nazarbayev University, 010000, Nur-Sultan, Kazakhstan;School of Materials Science and Engineering, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, 300130, Tianjin, China;

关键词: Anode;    NiCoS;    Nitrogen-doped carbon nanotube;    Lithium-ion batteries;    Binary metal sulfides;   

DOI  :  10.1186/s11671-021-03562-7

来源: Springer

【 摘 要 】

In recent years, the development of lithium-ion batteries (LIBs) with high energy density has become one of the important research directions to fulfill the needs of electric vehicles and smart grid technologies. Nowadays, traditional LIBs have reached their limits in terms of capacity, cycle life, and stability, necessitating their further improvement and development of alternative materials with remarkably enhanced properties. A nitrogen-containing carbon nanotube (N-CNT) host for bimetallic sulfide (NiCo2S4) is proposed in this study as an anode with attractive electrochemical performance for LIBs. The prepared NiCo2S4/N-CNT nanocomposite exhibited improved cycling stability, rate performance, and an excellent reversible capacity of 623.0 mAh g–1 after 100 cycles at 0.1 A g–1 and maintained a high capacity and cycling stability at 0.5 A g–1. The excellent electrochemical performance of the composite can be attributed to the unique porous structure, which can effectively enhance the diffusivity of Li ions while mitigating the volume expansion during the charge–discharge processes.

【 授权许可】

CC BY