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Updated: Sep 24, 2025

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K0.36(H2O) WS2: a new layered compound for reversible hydrated potassium ion intercalation in aqueous electrolyte
Yuanlv Mao1,2, Miao Xie1,2, Wei Zhao1
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences Shanghai 200050 P. R. China zhaowei220@mail.sic.ac.cn huangfq@mail.sic.ac.cn.
Abstract:
This work reports the synthesis of a new quasi two-dimensional layered compound, K0.36(H2O) WS2, for aqueous potassium ion storage. Its crystal structure determined by single crystal X-ray diffraction is composed of WS2 layers and disordered hydrated K+ stacking along the c direction alternately. Due to the large interlayer spacing and high conductivity, K0.36(H2O) WS2 is demonstrated to be a stable host for reversible intercalation and de-intercalation of hydrated K+ in K2SO4 aqueous solution.
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