Abstract Based on the density functional theory calculations, we have investigated the feasibility of two-dimensional β-GeS monolayer as high-performance anodes for alkali metal ion batteries. The results show that the electrical conductivity of β-GeS monolayer can be enhanced after adsorbing the alkali metal atoms owing to the semiconductor-to-metal transition. The low diffusion barriers of alkali metal atoms on the β-GeS surface indicate a rapid charge/discharge rate without metal clustering. Moreover, the low average open-circuit voltage (0.211 V) and a high theoretical capacity (1024 mAh·g-1) for Na suggest that the β-GeS monolayer is a promising anode material for Na-ion batteries with high performance.
Fund: Project supported by the the National Natural Science Foundation of China (Grant Nos. 52062035 and 51861023) and the Major Discipline Academic and Technical Leaders Training Program of Jiangxi Province, China (Grant No. 20213BCJ22056).
Meiqian Wan(万美茜), Zhongyong Zhang(张忠勇), Shangquan Zhao(赵尚泉)†, and Naigen Zhou(周耐根)‡ First-principles study on β-GeS monolayer as high performance electrode material for alkali metal ion batteries 2022 Chin. Phys. B 31 096301
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