High-Performance Sulfurized Polyacrylonitrile Cathode by Using MXene as a Conductive and Catalytic Binder for Room-Temperature Na/S Batteries

• DOI: 10.1021/acsami.3c17874
• Publication Date: 2024-02-15T21:46:00Z
• Authors: Tao Sun; Shuo Wang; Mengyao Xu; Ning Qiao; Qizhen Zhu; Bin Xu
• Keywords: Polyacrylonitrile

Sulfurized polyacrylonitrile (PAN@S) is a promising cathode material for room-temperature Na/S batteries but suffers from low conductivity and insufficient electrochemical activity, resulting in unsatisfactory actual capacity rate performance. Herein, Ti3C2Tx MXene nanosheets are used as conductive catalytic binder to establish the PAN@S electrode, wherein constructs highly framework fast charge transport provides high effect improve active utilization accelerate redox kinetics significantly. Therefore, electrode bonded by shows an electronic of 5.05 S cm–1, 4 orders magnitude higher than conventional electrodes insulative polymer binders, much decreased activation energy barrier resistance. Consequently, displays superior performance terms (697.3 mAh g–1 at 200 mA g–1), unparalleled capability (189.0 20 A excellent high-rate cycling (a decay ∼0.04% per cycle during 1000 cycles 5 g–1). This work high-performance potential binders boosting materials.