Kalimuldina, GulnurNurpeissova, ArailymAdylkhanova, AssylIssatayev, NurbolatAdair, DesmondBakenov, Zhumabay2021-08-162021-08-162021-03-26Kalimuldina, G., Nurpeissova, A., Adylkhanova, A., Issatayev, N., Adair, D., & Bakenov, Z. (2021). 3D Hierarchical Nanocrystalline CuS Cathode for Lithium Batteries. Materials, 14(7), 1615. https://doi.org/10.3390/ma14071615http://nur.nu.edu.kz/handle/123456789/5688Conductive and flexible CuS films with unique hierarchical nanocrystalline branches directly grown on three-dimensional (3D) porous Cu foam were fabricated using an easy and facile solution processing method without a binder and conductive agent for the first time. The synthesis procedure is quick and does not require complex routes. The structure and morphology of the as-deposited CuS/Cu films were characterized by X-ray diffraction and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy and transmission electron spectroscopy, respectively. Pure crystalline hexagonal structured CuS without impurities were obtained for the most saturated S solution. Electrochemical testing of CuS/Cu foam electrodes showed a reasonable capacity of 450 mAh·g−1 at 0.1 C and excellent cyclability, which might be attributed to the unique 3D structure of the current collector and hierarchical nanocrystalline branches that provide fast diffusion and a large surface area.enAttribution-NonCommercial-ShareAlike 3.0 United StatesType of access: Open Accesscopper sulfidelithium-ion batteryCu foamcathodebinder-freeArticle