Research Information System
Journal of Power Sources, vol.667, 2026 (SCI-Expanded, Scopus)
The improvement of sustainable and high-performance anodes is essential for the future of sodium-ion energy storage systems (SIESS). Transition metal chalcogenides (TMCs) as anode have become a focal point of research because to their substantial capability facilitated by conversion or alloying reactions. Herein, metallic cobalt nanoparticles supported on the chickpea stem derived carbon (Co@CSC) underwent controlled oxidation, sulfurization, and selenization to form cobalt chalcogenides/carbon (Co3O4@CSC, Co9S8@CSC, and Co3Se4@CSC) composites. Electrochemical evaluation of these composites for sodium-ion batteries (SIBs) reveals reversible capacity of 586 mAh g−1 at a current density of 0.1 A g−1, along with remarkable rate performance of 370 mAh g−1 at 2.0 A g−1and long-term stability after 1000 cycles for Co9S8@CSC. In contrast, the Co3Se4@CSC shows dominant pseudocapacitive contributions, enhancing both reversibility and long-term stability. Practical applicability is confirmed in full cells employing Na3V2(PO4)3 cathodes: the Co3Se4@CSC//Na3V2(PO4)3 configuration delivered capacity of 146 mAh g−1 at a current density of 0.1 A g−1. According to hybrid capacitor tests, Co3Se4@CSC surpass Co9S8@CSC by providing greater reversible capacity (∼85 mAh g−1) and steadier voltage profiles. Robust coupling between the cobalt chalcogenides and the conductive porous carbon promote efficient charge transport, preserved structural integrity during cycling, and enhanced redox kinetics.