3D CoMoSe4 Nanosheet Arrays Converted Directly from Hydrothermally Processed CoMoO4 Nanosheet Arrays by Plasma-Assisted Selenization Process Toward Excellent Anode Material in Sodium-Ion Battery

• Main Authors: Shan Zhang, Yuanfei Ai, Shu-Chi Wu, Hsiang-Ju Liao, Teng-Yu Su, Jyun-Hong Chen, Chuan-Hsun Wang, Ling Lee, Yu-Ze Chen, Binbin Xu, Shin-Yi Tang, Ding Chou Wu, Shao-Shin Lee, Jun Yin, Jing Li, Junyong Kang, Yu-Lun Chueh
• Format: Article
• Language: English
• Published: SpringerOpen 2019-06-01
• Series: Nanoscale Research Letters
• Subjects: CoMoSe4 nanosheet arrays; CoMoO4 nanosheet arrays; Plasma-assisted selenization; Sodium-ion battery
• Online Access: http://link.springer.com/article/10.1186/s11671-019-3035-6
• ISSN: 1931-7573; 1556-276X

Abstract In this work, three-dimensional (3D) CoMoSe4 nanosheet arrays on network fibers of a carbon cloth denoted as CoMoSe4@C converted directly from CoMoO4 nanosheet arrays prepared by a hydrothermal process followed by the plasma-assisted selenization at a low temperature of 450 °C as an anode for sodium-ion battery (SIB) were demonstrated for the first time. With the plasma-assisted treatment on the selenization process, oxygen (O) atoms can be replaced by selenium (Se) atoms without the degradation on morphology at a low selenization temperature of 450 °C. Owing to the high specific surface area from the well-defined 3D structure, high electron conductivity, and bi-metal electrochemical activity, the superior performance with a large sodium-ion storage of 475 mA h g−1 under 0.5–3 V potential range at 0.1 A g−1 was accomplished by using this CoMoSe4@C as the electrode. Additionally, the capacity retention was well maintained over 80 % from the second cycle, exhibiting a satisfied capacity of 301 mA h g−1 even after 50 cycles. The work delivered a new approach to prepare a binary transition metallic selenide and definitely enriches the possibilities for promising anode materials in SIBs with high performances.