Organic cation-supported layered vanadate cathode for high-performance aqueous zinc-ion batteries  

作　　者：Changding Wang Yingfang Li Sida Zhang Tian-Yi Sang|Yu Lei Ruiqi Liu Fu Wan Yuejiao Chen Weigen Chen|Yujie Zheng Shuhui Sun 

机构地区：[1]State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,National Innovation Center for Industry-Education Integration of Energy Storage Technology,Chongqing University,Chongqing,China [2]Institute National de la Recherche Scientifique(INRS),CentreÉnergie Matériaux Télécommunications,Varennes,Québec,Canada [3]MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems,CQU-NUS Renewable Energy Materials&Devices Joint [4]Laboratory,School of Energy&Power Engineering,Chongqing University,Chongqing,China 4State Key Laboratory of Powder Metallurgy,Central South University,Changsha,China

出　　处：《Carbon Energy》2025年第2期1-12,共12页碳能源(英文)

基　　金：Science Fund for Outstanding Young Scholars of Hunan Province,Grant/Award Number:2023JJ20064;National Natural Science Foundation of China,Grant/Award Number:12004057;Graduate Research and Innovation Foundation of Chongqing,Grant/Award Number:CYB23026;Natural Science Foundation of Chongqing Municipality,Grant/Award Number:CSTB2022NSCQ-MSX1183。

摘　　要：Layered vanadates are ideal energy storage materials due to their multielectron redox reactions and excellent cation storage capacity.However,their practical application still faces challenges,such as slow reaction kinetics and poor structural stability.In this study,we synthesized[Me_(2)NH_(2)]V_(3)O_(7)(MNVO),a layered vanadate with expended layer spacing and enhanced pH resistance,using a one-step simple hydrothermal gram-scale method.Experimental analyses and density functional theory(DFT)calculations revealed supportive ionic and hydrogen bonding interactions between the thin-layered[Me_(2)NH_(2)]+cation and[V_(3)O_(7)]-anion layers,clarifying the energy storage mechanism of the H^(+)/Zn^(2+)co-insertion.The synergistic effect of these bonds and oxygen vacancies increased the electronic conductivity and significantly reduced the diffusion energy barrier of the insertion ions,thereby improving the rate capability of the material.In an acidic electrolyte,aqueous zinc-ion batteries employing MNVO as the cathode exhibited a high specific capacity of 433 mAh g^(-1)at 0.1 A g^(-1).The prepared electrodes exhibited a maximum specific capacity of 237 mAh g^(-1)at 5 A g^(-1)and maintained a capacity retention of 83.5%after 10,000 cycles.This work introduces a novel approach for advancing layered cathodes,paving the way for their practical application in energy storage devices.

关 键 词：[V_(3)O_(7)]-layers layered vanadates organic cations pH resistance zinc-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]