Recent Advances on Challenges and Strategies of Manganese Dioxide Cathodes for Aqueous Zinc-Ion Batteries,Energy & Environmental Materials

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Recent Advances on Challenges and Strategies of Manganese Dioxide Cathodes for Aqueous Zinc-Ion Batteries
Energy & Environmental Materials ( IF 13.0 ) Pub Date : 2022-12-24 , DOI: 10.1002/eem2.12575
Yuhui Xu _{1,

2} , Gaini Zhang _{1,

2} , Jingqian Liu _{1,

2} , Jianhua Zhang _{1,

2} , Xiaoxue Wang _{1,

2} , Xiaohua Pu _{1,

2} , Jingjing Wang _{1,

2} , Cheng Yan _{1,

2} , Yanyan Cao _{1,

2} , Huijuan Yang _{1,

2} , Wenbin Li _{1,

2} , Xifei Li _{1,

2,

3}

Affiliation

Aqueous zinc-ion batteries (AZIBs) are regarded as promising electrochemical energy storage devices owing to its low cost, intrinsic safety, abundant zinc reserves, and ideal specific capacity. Compared with other cathode materials, manganese dioxide with high voltage, environmental protection, and high theoretical specific capacity receives considerable attention. However, the problems of structural instability, manganese dissolution, and poor electrical conductivity make the exploration of high-performance manganese dioxide still a great challenge and impede its practical applications. Besides, zinc storage mechanisms involved are complex and somewhat controversial. To address these issues, tremendous efforts, such as surface engineering, heteroatoms doping, defect engineering, electrolyte modification, and some advanced characterization technologies, have been devoted to improving its electrochemical performance and illustrating zinc storage mechanism. In this review, we particularly focus on the classification of manganese dioxide based on crystal structures, zinc ions storage mechanisms, the existing challenges, and corresponding optimization strategies as well as structure–performance relationship. In the final section, the application perspectives of manganese oxide cathode materials in AZIBs are prospected.

中文翻译：

水系锌离子电池二氧化锰正极的挑战与策略的最新进展

水系锌离子电池（AZIBs）因其成本低、本质安全、丰富的锌储量和理想的比容量而被认为是一种有前途的电化学储能装置。与其他正极材料相比，二氧化锰以其高电压、环保、高理论比容量而受到广泛关注。然而，结构不稳定、锰溶解和导电性差等问题使得高性能二氧化锰的探索仍然面临巨大挑战并阻碍其实际应用。此外，所涉及的锌储存机制很复杂并且有些争议。为了解决这些问题，人们付出了巨大的努力，如表面工程、杂原子掺杂、缺陷工程、电解质改性和一些先进的表征技术，致力于提高其电化学性能并阐明锌储存机制。在这篇综述中，我们特别关注基于晶体结构、锌离子储存机制、现有挑战和相应的优化策略以及结构与性能关系的二氧化锰的分类。最后对氧化锰正极材料在AZIBs中的应用前景进行了展望。

更新日期：2022-12-24

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