锌
法拉第效率
离子
电解质
水溶液
基质(水族馆)
溶剂化
分子
阳极
化学
材料科学
物理化学
电极
有机化学
海洋学
地质学
作者
Zhengchunyu Zhang,Peng Wang,Chuangliang Wei,Jinkui Feng,Shenglin Xiong,Shenglin Xiong
标识
DOI:10.1002/anie.202402069
摘要
The advanced aqueous zinc–ion batteries (AZIBs) are still challenging due to the harmful reactions including hydrogen evolution and corrosion. Here, a natural small molecule acid vitamin C (Vc) as an aqueous electrolyte additive has been selectively identified. The small molecule Vc can adjust the d band center of Zn substrate which fixes the active H+ so that the hydrogen evolution reaction (HER) is restrained. Simultaneously, it could also fine–tune the solvation structure of Zn ions due to the enhanced electrostatics and reduced Pauli repulsion verified by energy decomposition analysis (EDA). Hence, the cell retains an ultra–long cycle performance of over 1300 cycles and a superior Coulombic efficiency (CE) of 99.5%. The prepared full cells display increased rate capability, cycle lifetime, and self–discharge suppression. Our results shed light on the mechanistic principle of electrolyte additives on the performance improvement of ZIBs, which is anticipated to render a new round of studies.
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