Abstract
Aqueous zinc ion batteries(AZIBs)are now gaining widespread attention because of their cost-effectiveness,intrinsic safety,and high theoretical capacity.Nevertheless,it is still crucial to exploit high-performance electrode materials.Herein,the freestanding 1T MoS2@Mxene hybrid films(MMHF)were synthesized and directly served as the cathode of AZIBs.The freestanding MMHF exhibited the hierar-chical layer structure with excellent conductivity and strong interfacial interaction,which promoted the exposure of more active sites and the transfer of electrons/ions.Consequently,the MMHF displayed a high specific capacity of 270 mAh g-1(at 0.1 A g-1)and good rate performance.Impressively,even af-ter 2500 cycles under 10 A g-1,the freestanding MMHF cathode contributed a superior specific capacity of 108 mAh g-1 with an outstanding capacity retention rate of 94.7％.Meanwhile,the energy storage mechanism of the MMHF electrode was also elucidated through ex-situ characterizations.Furthermore,the density functional theory(DFT)computations revealed the strong interfacial interactions between 1T MoS2 and MXene,high conductivity,and low Zn2+diffusion barrier.This work provides a new viewpoint for designing freestanding transition metal disulfides(TMDs)-MXene hybrid film electrodes for AZIBs.
基金项目
Natural Science Foundation of Hebei Province(B2022202059)
Open Foundation of State Key Laboratory of Chemical Engineering(SKL-ChE-22B05)
China Postdoctoral Science Foundation(2023M740969)
National Natural Science Foundation of China(U20A20153)
NETL
NSTL
万方数据