材料科学
阴极
储能
阳极
电解质
金属
能量密度
水解
氢气储存
镁
化学工程
冶金
物理化学
合金
工程物理
电极
有机化学
热力学
化学
工程类
功率(物理)
物理
作者
Chao Yang,Zhichen Pu,Zhenfei Jiang,Xiaowen Gao,Kewei Wang,Shiyang Wang,Yuming Chai,Qi Li,Xue‐Jun Wu,Yunlong Xiao,Dongsheng Xu
标识
DOI:10.1002/aenm.202201718
摘要
Abstract Rechargeable magnesium batteries (RMBs) are a kind of energy storage system with high safety, low cost, and high volumetric energy density. In general perception, H 2 O will passivate the Mg‐metal anode. But herein, a coordination–hydrolysis strategy is developed, in which H 2 O can be used as an additive to produce dissociated H + . Moreover, MgH + energy storage mechanism is discovered on CuSe cathode, which helps the specific capacity and energy density enhance to 480 mAh g −1 and 413 Wh kg −1 , respectively. This coordination–hydrolysis strategy also promotes the conductivity and electron transfer ability of electrolyte. Consequently, the specific capacity can remain 247 mAh g −1 even at 2 A g −1 . MgH + energy storage route gets rid of massive cathode material, and protons have the smallest size and lightest weight, whose theoretical energy density can reach 4230 Wh kg −1 . The results elucidated here provide a new route for energy‐dense RMBs.
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