A composite of ultra-fine few-layer MoS structures embedded on N,P-co-doped bio-carbon for high-performance sodium-ion batteries

• Published in: New journal of chemistry 2020-02, Vol.44 (5), p.246-252
• Main Authors: Luo, Fenqiang, Xia, Xinshu, Zeng, Lingxing, Chen, Xiaochuan, Feng, Xiaoshan, Wang, Jianbiao, Xu, Lihong, Qian, Qingrong, Wei, Mingdeng, Chen, Qinghua
• Format: Article
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/c9nj05921k

A sustainable and easy method for the fabrication of a composite of ultra-fine few-layer MoS 2 structures embedded on N,P-co-doped bio-carbon (MoS 2 -N/P-C) was developed by using natural chlorella as an adsorbent and reactor. This MoS 2 -N/P-C composite was easily synthesized by carrying out a biosorption of chlorella and a subsequent calcination process. This bio-carbon made from chlorella acted as a nanoreactor to prevent the MoS 2 nanoparticles from agglomerating with each other during the calcination process. Besides, the N,P-codoped bio-carbon contributed to the relatively high conductivity and surface wettability of this composite and accommodated the large radius of Na + . When used as an anode for sodium ion batteries, it showed significant superiority with a high rate and long-duration cycling performance, evidenced by a measured capacity of 175 mA h g −1 after 2000 cycles at 5 A g −1 . Highly dispersed ultra-fine few-layer MoS 2 embedded on N/P co-doped bio-carbon composite (MoS 2 -N/P-C) was synthesized and it delivers excellent high-rate long term cycling performance (175 mA h g −1 after 2000 cycles at 5 A g −1 ).