锌
钝化
铟
镍
电化学
电池(电)
化学工程
过渡金属
冶金
兴奋剂
氢气储存
电化学动力学
无机化学
材料科学
化学
电极
纳米技术
物理化学
生物化学
光电子学
物理
催化作用
图层(电子)
工程类
合金
量子力学
功率(物理)
作者
Lulu Zhang,Kaixin Wang,Chaozhen Liu,Xin Gao,Baoyan Zhao,Maosen Jing,Julong Li,Lei Gou,Feng Gong,Xiaoyong Fan
标识
DOI:10.1016/j.cej.2024.151779
摘要
Aqueous nickel-zinc (Ni-Zn) battery is one promising grid energy storage device owing to its high theoretical energy density, high safety and low cost. However, the large-scale commercialization of Ni-Zn battery is significantly hindered by its low practical energy density and poor cycle lifespan caused by the low reversibility and transition kinetics between the metallic Zn and ZnO with low Zn utilization. To address these issues, a type of hierarchical porous Indium-doping ZnO micro-bowls (In-ZnO) is constructed through an in-situ chemical corrosion strategy. The abundant voids and pores facilitate the ionic transport, and simultaneously accommodate the volumetric expansion during the electrochemical transition between metallic Zn and ZnO. Density functional theory calculations further reveal that In-ZnO achieves the enhanced electrical/ionic conductivity and improved adsorption to OH–, accelerating the solid–liquid transitions of Zn-Zn(OH)42- and Zn(OH)42--ZnO, as well as the solid–solid transition of Zn-ZnO. Simultaneously, the Indium-doping inhibits the hydrogen evolution and passivation. Ascribed to the synergetic effect of the hierarchical porous structure and Indium-doping, the In-ZnO electrode demonstrates ultra-stable capacity retention of 98.6% over 1000 cycles at 9 A/g under 92.3% Zn utilization, and high capacity of 590.2 mAh/g even at high current density of 36 A/g.
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