Construction of MoS2/C Hierarchical Tubular Heterostructures for High-Performance Sodium Ion Batteries

Qichang Pan; Qiaobao Zhang; Fenghua Zheng; Yanzhen Liu; Youpeng Li; Xing Ou; Xunhui Xiong; Chenghao Yang; Meilin Liu

doi:10.1021/acsnano.8b07172

Construction of MoS₂/C Hierarchical Tubular Heterostructures for High-Performance Sodium Ion Batteries

ACS Nano. 2018 Dec 26;12(12):12578-12586. doi: 10.1021/acsnano.8b07172. Epub 2018 Nov 27.

Authors

Qichang Pan¹, Qiaobao Zhang², Fenghua Zheng¹, Yanzhen Liu¹, Youpeng Li¹, Xing Ou¹, Xunhui Xiong¹, Chenghao Yang¹, Meilin Liu^{1

3}

Affiliations

¹ Guangzhou Key Laboratory of Surface Chemistry of Energy Materials, New Energy Research Institute, School of Environment and Energy , South China University of Technology , Guangzhou 510006 , China.
² Department of Materials Science and Engineering, College of Materials , Xiamen University , Xiamen , Fujian 361005 , China.
³ School of Materials Science & Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332-0245 , United States.

PMID: 30452222
DOI: 10.1021/acsnano.8b07172

Abstract

Molybdenum disulfide (MoS₂) has been considered to be a promising anode material for sodium ion batteries (SIBs), because of its high capacity and graphene-like layered structure. However, irreversible conversion reaction during the sodiation/desodiation process is a major problem that must be overcome before its practical applications. In this work, MoS₂/amorphous carbon (C) microtubes (MTs) composed of heterostructured MoS₂/C nanosheets have been developed via a simple template method. The existence of MoS₂/C heterointerface plays a key role in achieving high and stable performance by stabilizing the reaction products Mo and sulfide phases, providing fast electronic and Na⁺ ions diffusion mobility, and alleviating the volume change. MoS₂/C MTs exhibit a high reversible specific capacity of 563.5 mA h g^-1 at 0.2 A g^-1, good rate performance (520.5, 489.4, 452.9, 425.1, and 401.3 mA h g^-1 at 0.5, 1.0, 2.0, 5.0, and 10.0 A g^-1, respectively), and excellent cycling stability (484.9 mA h g^-1 at 2.0 A g^-1 after 1500 cycles).

Keywords: MoS2; conversion reaction; in situ TEM; in situ XRD; sodium ion batteries.