Polysulfide-mediating properties of nickel phosphide carbon composite nanofibers as free-standing interlayers for lithium-sulfur batteries
Belgibayeva A. Turarova G. Dangaliyeva A. Sultanov F. Nurpeissova A. Mukanova A. Bakenov Z.
15 November 2024Royal Society of Chemistry
RSC Advances
2024#14Issue 4936593 - 36601 pp.
Issues such as the polysulfide shuttle effect and sulfur loss challenge the development of high-energy-density lithium-sulfur batteries. To address these limitations, a tailored approach is introduced using nickel phosphide carbon composite nanofibers (NixP/C) with controlled surface oxidation layers. These nanofibers feature a hierarchical structure that leverages the benefits of nickel phosphide nanoparticles and a carbonaceous matrix to enable efficient sulfur encapsulation and suppress polysulfide diffusion. Comprehensive characterization and electrochemical testing reveal that NixP/C, when employed as interlayers in a cell with a bio-waste-derived carbon-based sulfur cathode, significantly enhance electrochemical performance by increasing charge-discharge capacities and reducing charge-transfer resistance. Post-mortem analyses further show effective polysulfide trapping and conversion on the cathode side, preventing their shuttle to the anode, which results in a remarkable cycle stability of up to 200 cycles at 2C with a high discharge capacity of about 800 mA h g−1. These findings confirm the potential of NixP/C to improve lithium-sulfur battery technologies and demonstrate their applicability in diverse lithium-sulfur cell configurations.
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National Laboratory Astana, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Institute of Batteries LLC, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
National Laboratory Astana
Department of Chemical and Materials Engineering
Institute of Batteries LLC
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