Deeply understanding the Zn anode behaviour and corresponding improvement strategies in different aqueous Zn-based batteries,Energy & Environmental Science

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Deeply understanding the Zn anode behaviour and corresponding improvement strategies in different aqueous Zn-based batteries
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2020-09-05 , DOI: 10.1039/d0ee02162h
Junnan Hao _{1,

2,

3,

4,

5} , Xiaolong Li _{1,

2,

3,

4,

5} , Xiaohui Zeng _{1,

2,

3,

4,

5} , Dan Li _{6,

7,

8,

9} , Jianfeng Mao _{1,

2,

3,

4,

5} , Zaiping Guo _{1,

2,

3,

4,

5}

Affiliation

Owing to the high capacity of the metallic Zn anode and intrinsically safe aqueous electrolyte, aqueous Zn-based batteries are advanced energy storage technology alternatives beyond lithium-ion batteries, providing a cost benefit, high safety, and competitive energy density. There has been a new wave of research interest across the family of Zn batteries, but fundamental understanding of the Zn electrode and its performance improvement still remain inconclusive. Based on the pH value of the electrolyte, Zn-based batteries can be divided into two types, with one adopting alkaline electrolyte and the other mild (including slightly acidic) electrolyte. As the behavior of the Zn electrode in these two distinctive systems is different, their requirements to yield excellent performance are different. In this Review, we present a comprehensive overview of the Zn electrode and its fundamentals in both systems. First, the differences and similarities of the Zn electrode in both systems are outlined. Specific attention is paid to the working principles and technical challenges. Then, Zn electrode issues and recently proposed strategies for each system are summarized and compared. Finally, a perspective on future research directions towards practical applications of aqueous Zn batteries is included.

中文翻译：

深入了解不同水基锌基电池中的锌阳极行为和相应的改善策略

由于金属Zn阳极的高容量和本质安全的水性电解质，基于Zn的水性电池是锂离子电池以外的先进储能技术替代品，具有成本效益，高安全性和有竞争力的能量密度。整个Zn电池家族都引起了新的研究兴趣，但是对Zn电极及其性能改进的基本了解仍然没有定论。根据电解质的pH值，锌基电池可分为两种类型，一种采用碱性电解质，另一种采用温和（包括弱酸性）电解质。由于这两个不同系统中Zn电极的行为不同，因此对产生优异性能的要求也不同。在这篇评论中，我们将对两种系统中的Zn电极及其基本原理进行全面概述。首先，概述了两种系统中锌电极的区别和相似之处。特别注意工作原理和技术挑战。然后，总结并比较了每个系统的锌电极问题和最近提出的策略。最后，包括对未来水性锌电池实际应用研究方向的看法。

更新日期：2020-11-03

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