Self-Assembled Few-Layered MoS2 on SnO2 Anode for Enhancing Lithium-Ion Storage

Thang Phan Nguyen; Il Tae Kim

doi:10.3390/nano10122558

Self-Assembled Few-Layered MoS₂ on SnO₂ Anode for Enhancing Lithium-Ion Storage

Nanomaterials (Basel). 2020 Dec 20;10(12):2558. doi: 10.3390/nano10122558.

Authors

Thang Phan Nguyen¹, Il Tae Kim¹

Affiliation

¹ Department of Chemical and Biological Engineering, Gachon University, Seongnam-si, Gyeonggi-do 13120, Korea.

Abstract

SnO₂ nanoparticles (NPs) have been used as reversible high-capacity anode materials in lithium-ion batteries, with reversible capacities reaching 740 mAh·g^-1. However, large SnO₂ NPs do not perform well in charge-discharge cycling. In this work, we report the incorporation of MoS₂ nanosheet (NS) layers with SnO₂ NPs. SnO₂ NPs of ~5 nm in diameter synthesized by a facile hydrothermal precipitation method. Meanwhile, MoS₂ NSs of a few hundreds of nanometers to a few micrometers in lateral size were produced by top-down chemical exfoliation. The self-assembly of the MoS₂ NS layer on the gas-liquid interface was first demonstrated to achieve up to 80% coverage of the SnO₂ NP anode surface. The electrochemical properties of the pure SnO₂ NPs and MoS₂-covered SnO₂ NP anodes were investigated. The results showed that the SnO₂ electrode with a single-layer MoS₂ NS film exhibited better electrochemical performance than the pure SnO₂ anode in lithium storage applications.

Keywords: MoS2; SnO2; lithium-ion battery; nanosheets; self-assembly.

Abstract

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