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High-performance free-standing anode material WS2@HCP010N for potassium ion battery

Year: 2025
Type: article
Abstract: Potassium ion batteries (PIBs) are anticipated to serve as an alternative to lithium ion batteries (LIBs) because the abundant raw material reserves and the more negative standard electrode potential of K + /K, which is (−2.93 V). However, there are numerous problems of potassium ion batteries, such as the unstable structure of anode materials and cyclic performance. Among various types of anode materials for potassium batteries, carbon-based materials are cost-effective and possess a special porous structure and stable electrode properties. Nevertheless, the capacity of carbon-based materials is not satisfactory. In this article, a new free-standing WS 2 @HCP010N electrode is designed through the solvent-thermal method. The WS 2 @HCP010N free-standing anode offers a first-cycle specific capacity of 350.4 mA h g −1 at a current density of 0.1 A g −1 and the specific capacity of 106.3 mA h g −1 at a current density of 0.2 A g −1 after 682 cycles with a coulomb efficiency of 99.66 %. Cyclic voltammetry curves reveal the intercalation/deintercalation reaction of WS 2 during cycling, and the fast charge transfer kinetics of WS 2 @HCP010N is demonstrated by diffusion coefficient and electrochemical impedance tests. The self-supporting WS 2 @HCP010N electrode provides a new idea and strategy for the new generation of potassium ion batteries. • We synthesized a WS 2 @HCP010N for the first time. • The WS 2 @HCP010N material has a unique structure and self-support. • The WS 2 @HCP010N anode materials exhibit excellent electrochemical properties in potassium ion batteries.
DOI: 10.1016/j.est.2025.116476
Language: English
Open Access status: hybrid
Estimated APC paid: $3,560
OpenAlex ID: W4409239390
FWCI: 1.586
Cites: 56
Cited by: 7
Related to: 10