Nguyen Thang Phan, Kim Il Tae
Department of Chemical and Biological Engineering, Gachon University, Seongnam-si, Gyeonggi-do 13120, Korea.
Nanomaterials (Basel). 2020 Dec 20;10(12):2558. doi: 10.3390/nano10122558.
SnO nanoparticles (NPs) have been used as reversible high-capacity anode materials in lithium-ion batteries, with reversible capacities reaching 740 mAh·g. However, large SnO NPs do not perform well in charge-discharge cycling. In this work, we report the incorporation of MoS nanosheet (NS) layers with SnO NPs. SnO NPs of ~5 nm in diameter synthesized by a facile hydrothermal precipitation method. Meanwhile, MoS 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 MoS NS layer on the gas-liquid interface was first demonstrated to achieve up to 80% coverage of the SnO NP anode surface. The electrochemical properties of the pure SnO NPs and MoS-covered SnO NP anodes were investigated. The results showed that the SnO electrode with a single-layer MoS NS film exhibited better electrochemical performance than the pure SnO anode in lithium storage applications.
SnO纳米颗粒（NPs）已被用作锂离子电池中可逆的高容量负极材料，其可逆容量可达740 mAh·g。然而，大尺寸的SnO NPs在充放电循环中表现不佳。在这项工作中，我们报道了将MoS纳米片（NS）层与SnO NPs相结合。通过简便的水热沉淀法合成了直径约为5 nm的SnO NPs。同时，通过自上而下的化学剥离法制备了横向尺寸为几百纳米到几微米的MoS NSs。首次证明了MoS NS层在气液界面上的自组装能够实现对SnO NP负极表面高达80%的覆盖。研究了纯SnO NPs和MoS覆盖的SnO NP负极的电化学性能。结果表明，在锂存储应用中，具有单层MoS NS薄膜的SnO电极比纯SnO负极表现出更好的电化学性能。
