首页|Revealing the role of calcium ion intercalation of hydrated vanadium oxides for aqueous zinc-ion batteries

Revealing the role of calcium ion intercalation of hydrated vanadium oxides for aqueous zinc-ion batteries

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Exploring suitable high-capacity V2O5-based cathode materials is essential for the rapid advancement of aqueous zinc ion batteries(ZIBs).However,the typical problem of slow Zn2+diffusion kinetics has severely limited the feasibility of such materials.In this work,unique hydrated vanadates(CaVO,BaVO)were obtained by intercalation of Ca2+or Ba2+into hydrated vanadium pentoxide.In the CaVO//Zn and BaVO//Zn batteries systems,the former delivered up to a 489.8 mAh g-1 discharge specific capac-ity at 0.1 A g-1.Moreover,the remarkable energy density of 370.07 Wh kg-1 and favorable cycling sta-bility yard outperform BaVO,pure V2O5,and many reported cathodes of similar ionic intercalation compounds.In addition,pseudocapacitance analysis,galvanostatic intermittent titration(GITT)tests,and Trasatti analysis revealed the high capacitance contribution and Zn2+diffusion coefficient of CaVO,while an in-depth investigation based on EIS elucidated the reasons for the better electrochemical perfor-mance of CaVO.Notably,ex-situ XRD,XPS,and TEM tests further demonstrated the Zn2+insertion/extrac-tion and Zn-storage mechanism that occurred during the cycle in the CaVO//Zn battery system.This work provides new insights into the intercalation of similar divalent cations in vanadium oxides and offers new solutions for designing cathodes for high-capacity aqueous ZIBs.

Aqueous zinc ion batteriesCathode materialsIon pre-intercalationVanadium oxidesEnergy storage mechanism

Tao Zhou、Xuan Du、Guo Gao

展开 >

Key Laboratory for Thin Film and Micro Fabrication of the Ministry of Education,School of Sensing Science and Engineering,School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

National Key Research and Development Program of ChinaGiga Force Electronics Interdisciplinary Funding

2022YFA1207503JJHXM002208-2023

2024

10.1016/j.jechem.2024.03.022

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.95(8)