溶解
锰
氢氧化物
材料科学
阴极
化学工程
锌
水溶液
沉积(地质)
氢氧化锌
氧化物
电化学
普鲁士蓝
无机化学
电极
化学
冶金
沉积物
生物
工程类
物理化学
古生物学
作者
Yifeng Qi,Fengfeng Li,Hongwei Sheng,Haoshuo Zhang,Jiao Yuan,Lingxiao Ma,Huasheng Bi,Yuqi Ma,Wenquan Li,Wei Lan
出处
期刊:Small
[Wiley]
日期:2024-08-28
标识
DOI:10.1002/smll.202404312
摘要
Abstract Manganese oxide (MnO 2 ) based aqueous zinc‐ion batteries (AZIBs) are considered to be a promising battery for grid‐scale energy storage. However, they usually suffer from the great challenge of capacity attenuation due to Mn dissolution and irreversible structural transformation. Herein, full use of the shortcomings is made to design high‐performance cathode‐free AZIBs. Manganese‐based Prussian blue analog (Mn‐PBA) is selected as a seed layer to provide a stable MnO 2 electrodeposition surface. Thanks to the large specific surface area and manganophilic nature of Mn‐PBA, the deposition/dissolution kinetics between Mn 2+ and MnO 2 are significantly enhanced. Systematic studies revealed the mechanism of MnO 2 deposition‐dissolution related to the reversible transformation of manganese oxide hydroxide and zinc hydroxide sulfate hydrate. Based on this, the developed cathode‐free AZIBs exhibit outstanding rate performance (with a specific capacity of 273.7 mAh g −1 at 1 A g −1 ) and extraordinary cycle stability (maintaining a specific capacity of 52.3 mAh g −1 after 50 000 cycles at 20 A g −1 ). Furthermore, the AZIBs with non‐toxic, biocompatible materials can be directly discarded after use, without causing pollution to the environment, which is expected to help achieve the sustainable development goals.
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