Sn-MoS2 -C@C Microspheres as a Sodium-Ion Battery Anode Material with High Capacity and Long Cycle Life

Fenghua Zheng; Qichang Pan; Chenghao Yang; Xunhui Xiong; Xing Ou; Renzong Hu; Yu Chen; Meilin Liu

doi:10.1002/chem.201605005

Sn-MoS₂ -C@C Microspheres as a Sodium-Ion Battery Anode Material with High Capacity and Long Cycle Life

Chemistry. 2017 Apr 11;23(21):5051-5058. doi: 10.1002/chem.201605005. Epub 2017 Mar 27.

Authors

Fenghua Zheng¹, Qichang Pan¹, Chenghao Yang¹, Xunhui Xiong¹, Xing Ou¹, Renzong Hu², Yu Chen², Meilin Liu^{1

2}

Affiliations

¹ Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, P.R. China.
² School of Materials Science & Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA.

PMID: 28198574
DOI: 10.1002/chem.201605005

Abstract

Sodium ion batteries (SIBs) have been regarded as a prime candidate for large-scale energy storage, and developing high performance anode materials is one of the main challenges for advanced SIBs. Novel structured Sn-MoS₂ -C@C microspheres, in which Sn nanoparticles are evenly embedded in MoS₂ nanosheets and a thin carbon film is homogenously engineered over the microspheres, have been fabricated by the hydrothermal method. The Sn-MoS₂ -C@C microspheres demonstrate an excellent Na-storage performance as an anode of SIBs and deliver a high reversible charge capacity (580.3 mAh g^-1 at 0.05 Ag^-1 ) and rate capacity (580.3, 373, 326, 285.2, and 181.9 mAh g^-1 at 0.05, 0.5, 1, 2, and 5 Ag^-1 , respectively). A high charge specific capacity of 245 mAh g^-1 can still be achieved after 2750 cycles at 2 Ag^-1 , indicating an outstanding cycling performance. The high capacity and long-term stability make Sn-MoS₂ -C@C composite a very promising anode material for SIBs.

Keywords: MoS2; Sn; anode materials; conducting materials; sodium ion batteries.