Ultrafine MoS2 Nanosheets Vertically Patterned on Graphene for High-Efficient Li-Ion and Na-Ion Storage

Chunguang Wei; Zhidong Hou; Huanhuan Sun; Jian-Gan Wang

doi:10.3389/fchem.2021.802788

Ultrafine MoS₂ Nanosheets Vertically Patterned on Graphene for High-Efficient Li-Ion and Na-Ion Storage

Front Chem. 2021 Dec 3:9:802788. doi: 10.3389/fchem.2021.802788. eCollection 2021.

Authors

Chunguang Wei¹, Zhidong Hou², Huanhuan Sun², Jian-Gan Wang²

Affiliations

¹ Shenzhen Cubic-Science Co., Ltd., Shenzhen, China.
² Center for Nano Energy Materials, State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China.

Abstract

Hierarchically two-dimensional (2D) heteroarchitecture with ultrafine MoS₂ nanosheets vertically patterned on graphene is developed by using a facile solvothermal method. It is revealed that the strong interfacial interaction between acidic Mo precursors and graphene oxides allows for uniform and tight alignment of edge-oriented MoS₂ nanosheets on planar graphene. The unique sheet-on-sheet architecture is of grand advantage in synergistically utilizing the highly conductive graphene and the electroactive MoS₂, thus rendering boosted reaction kinetics and robust structural integrity for energy storage. Consequently, the heterostructured MoS₂@graphene exhibits impressive Li/Na-ion storage properties, including high-capacity delivery and superior rate/cycling capability. The present study will provide a positive impetus on rational design of 2D metal sulfide/graphene composites as advanced electrode materials for high-efficient alkali-metal ion storage.

Keywords: Li-ion batteries; MoS2; Na-ion batteries; graphene; heterostructure.