Опубликована: Янв. 1, 2023

Two-dimensional (2D) titanium carbide MXene (Ti3C3Tx) is highly favored within the domain of energy storage due to their ultra-high specific surface area, good ion diffusion performance, favorable conductivity and high stability. However, separate films are easy re-accumulate, which hinders transport ions charges, thus seriously reducing electrochemical properties. Herein, a viable hydrothermal method adopted achieve self-assembly N S co-doped three-dimensional porous carbon (3DPC) with conductive networks for supercapacitors (SCs) sodium-ion batteries (SIBs) applications. In this heterogeneous structure, 3DPC not only provides transfer path but also supports MXene, alleviating agglomeration increasing cyclic Meanwhile, S-doped has higher conductivity, can provide capacity, active fast electron characteristics, thereby improving performance. For SCs, N,S-MXene/3DPC electrode displays 412.7 F g-1 at 1 A g-1. When all-solid-state asymmetric SCs (ASCs) manufactured carbon, N,S-MXene/3DPC//AC ASCs present 210.5 retain 97.5% initial cycle through 5000 rotations. The density reaches its maximum 94.7 Wh kg-1 900 W kg-1. charges 0.2 g-1, anode SIBs demonstrates reversible capability 465.5 mAh It sustains remarkable 72.9% preservation capacity over 1000 rotations 2.0 Na3V2(PO4)3@C (NVP@C) selected as cathode, NVP@C//N,S-MXene/3DPC full SIB cells show an excellent stability remain 156.6/164.5 discharge/charge 0.5 200 circulations, corresponding retention 71.7%.

Язык: Английский