H_2O-Boosted MgProton Collaborated Energy Storage for Rechargeable Mg-Metal Batteries

Chaoran Yang; Zhichen Pu; Zhenfei JiangXiaowen GaoKewei WangShiyang WangYuming ChaiQi LiXuejun WuYunlong XiaoDongsheng Xu

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H_2O-Boosted MgProton Collaborated Energy Storage for Rechargeable Mg-Metal Batteries

机译：H_2O-Boosted MgProton Collaborated Energy Storage for Rechargeable Mg-Metal Batteries

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Rechargeable magnesium batteries (RMBs) are a kind of energy storagesystem with high safety, low cost, and high volumetric energy density. Ingeneral perception, H_2O will passivate the Mg-metal anode. But herein, acoordination–hydrolysis strategy is developed, in which H_2O can be usedas an additive to produce dissociated H~+. Moreover, MgH~+ energy storagemechanism is discovered on CuSe cathode, which helps the specific capacityand energy density enhance to 480 mAh g~(?1) and 413 Wh kg~(?1), respectively.This coordination–hydrolysis strategy also promotes the conductivity andelectron transfer ability of electrolyte. Consequently, the specific capacity canremain 247 mAh g~(?1) even at 2 A g~(?1). MgH+ energy storage route gets rid ofmassive cathode material, and protons have the smallest size and lightestweight, whose theoretical energy density can reach 4230 Wh kg~(?1). The resultselucidated here provide a new route for energy-dense RMBs.

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来源
《Advanced energy materials》 |2022年第34期|2201718.1-2201718.8|共8页
作者
Chaoran Yang; Zhichen Pu; Zhenfei JiangXiaowen GaoKewei WangShiyang WangYuming ChaiQi LiXuejun WuYunlong XiaoDongsheng Xu;
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作者单位

State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210008, China;

College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871, China;

Beijng National Laboratory for Molecular SciencesState Key Laboratory for Structural Chemistry of Unstable SpeciesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871, China;

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正文语种英语
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high rate capability; Mg-H~+ energy storage route; rechargeable Mg-metal batteries; water-boosted electrolyte;

H_2O-Boosted MgProton Collaborated Energy Storage for Rechargeable Mg-Metal Batteries

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