阳极
法拉第效率
锌
电解质
氢氧化锌
沉积(地质)
水溶液
化学
纹理(宇宙学)
化学工程
枝晶(数学)
无机化学
吸附
材料科学
电极
冶金
有机化学
人工智能
生物
古生物学
计算机科学
数学
物理化学
工程类
图像(数学)
沉积物
几何学
作者
Yuexian Song,Jiao Wang,Xia Zhong,Yaohui Zhang,Kai Wang,Xiaojin Guo,Huijuan Guo,Guangping Lei,Hantao Liu,Gongkai Wang,Puguang Ji,Xin Zhang,Umedjon Khalilov,Junfei Liang,Rui Wen
标识
DOI:10.1016/j.jcis.2024.03.168
摘要
Zn anodes suffer from the formation of uncontrolled dendrites aggravated by the uneven electric field and the insulating by-product accumulation in aqueous zinc-ion batteries (AZIBs). Here, an effective strategy implemented by 1-butyl-3-methylimidazolium hydrogen sulfate (BMIHSO4) additive is proposed to synergistically tune the crystallographic orientation of zinc deposition and suppress the formation of zinc hydroxide sulfate for enhancing the reversibility on Zn anode surface. As a competing cation, BMI+ is proved to preferably adsorb on Zn-electrode compared with H2O molecules, which shields the "tip effect" and inhibits the Zn-deposition agglomerations to inducing the horizontal growth along Zn (002) crystallographic texture. Simultaneously, the protonated BMIHSO4 additives could remove the detrimental OH- in real-time to fundamentally eliminate the accumulation of 6Zn(OH)2·ZnSO4·4H2O and Zn4SO4(OH)6·H2O on Zn anode surface. Consequently, Zn anode exhibits an ultra-long cycling stability of one year (8762 h) at 0.2 mA cm-2/0.2 mAh cm-2, 3600 h at 2 mA cm-2/2 mAh cm-2 with a high plating cumulative capacity of 3.6 Ah cm-2, and a high average Coulombic efficiency of 99.6 % throughout 1000 cycles. This work of regulating Zn deposition texture combined with eliminating notorious by-products could offer a desirable way for stabilizing the Zn-anode/electrolyte interface in AZIBs.
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