首页|Stable multi-electron reaction stimulated by W doping VS4 for enhancing magnesium storage performance

Stable multi-electron reaction stimulated by W doping VS4 for enhancing magnesium storage performance

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Rechargeable magnesium batteries(RMBs)hold promise for offering higher volumetric energy density and safety features,attracting increasing research interest as the next post lithium-ion batteries.Developing high performance cathode material by inducing multi-electron reaction process as well as maintaining structural stability is the key to the development and application of RMBs.Herein,multi-electron reaction occurred in VS4 by simple W doping strategy.W doping induces valence of partial V as V2+ and V3+ in VS4 structure,and then stimulates electrochemical reaction involving multi-electrons in 0.5％W-V-S.The flower-like microsphere morphology as well as rich S vacancies is also modulated by W doping to neutralize structure change in such multi-electron reaction process.The fabricated 0.5％W-V-S delivers higher specific capacity(149.3 mA h g-1 at 50 mA g-1,which is 1.6 times higher than that of VS4),superior rate capability(76 mA h g-1 at 1000 mA g-1),and stable cycling performance(1500 cycles with capacity retention ratio of 93.8％).Besides that,pesudocapaticance-like contribution analysis as well as galvanostatic intermittent titration technique(GITT)further confirms the enhanced Mg2+ stor-age kinetics during such multi-electron involved electrochemical reaction process.Such discovery pro-vides new insights into the designing of multi-electron reaction process in cathode as well as neutralizing structural change during such reaction for realizing superior electrochemical performance in energy storage devices.

Multi-electron reactionW dopingStable structureCathodeRechargeable magnesium batteries

Yuxin Tian、Jiankang Chen、Guofeng Wang、Bing Sun、Alan Meng、Lei Wang、Guicun Li、Jianfeng Huang、Shiqi Ding、Zhenjiang Li

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College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China

Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science,MOE,Shandong Key Laboratory of Biochemical Analysis,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China

School of Material Science and Engineering,International S&T Cooperation Foundation of Shaanxi Province,Xi'an Key Laboratory of Green Manufacture of Ceramic Materials,Shaanxi University of Science and Technology,Xi'an 710021,Shaanxi,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaMajor Basic Research Program of the Natural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvincePostdoctoral Program in Qingdao

520721965200220052102106522022622237908122379080ZR2020ZD09ZR2020QE063ZR202108180009ZR2023QE059QDBSH20220202019

2024

10.1016/j.jechem.2023.10.042

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)：2024.89(2)
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