Ammonium-driven modulation of 1T-MoS 2 structure and composite with graphene: A pathway to high-performance lithium-ion battery anodes

• Published in: Journal of colloid and interface science 2025-02, Vol.680 (Pt A), p.151
• Main Authors: Zhao, Lianyu, Wang, Yishan, Wen, Guangwu, Zhang, Xueqian, Huang, Xiaoxiao
• Format: Article
• Language: English
• ISSN: 1095-7103

The lack of stable anode materials with high capacity and fast redox kinetics has hindered the application of lithium-ion batteries (LIBs) for energy storage. Metal-phase molybdenum disulfide (1T-MoS ) is recognized as a promising energy storage material because of its combination of excellent physical and electrochemical properties. In this paper, we report the insertion of ammonium ions (NH ) into the MoS interlayer and effective complexation with graphene oxide (GO). The MoS layer spacing was effectively enlarged from 0.67 nm to 1.1 nm by NH insertion, and this method not only maintains the stability of the 1T phase and reduces the energy barriers for Li insertion and de-embedding, but also improves the diffusion kinetics of Li . The Li diffusion coefficients of the prepared 1T-MoS2/G composites were confirmed to be enhanced by three orders of magnitude by constant current intermittent titration technique tests. Compared with the conventional preparation method, the mechanism of action of NH insertion provides a new regulation strategy. In addition, electrochemical studies showed that the specific capacity of the prepared 1T-MoS2/G electrode was 1533 mAh/g for 180 cycles at 0.1 A/g and 1679 mAh/g for 800 cycles at 0.5 A/g. Thus, the strategy of introducing NH intercalation to improve the cycling stability of MoS raises the prospect of practical application of layered metal sulfide anodes.