Bifunctional electrocatalysts for Zn–air batteries: recent developments and future perspectives,Journal of Materials Chemistry A

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Bifunctional electrocatalysts for Zn–air batteries: recent developments and future perspectives
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020/03/06 , DOI: 10.1039/c9ta14231b
Shuangshuang Ren _{1,

2,

3,

4,

5} , Xinde Duan _{1,

2,

3,

4,

5} , Shuai Liang _{1,

2,

3,

4,

5} , Mingdao Zhang _{6,

7,

8,

9,

10} , Hegen Zheng _{1,

2,

3,

4,

5}

Affiliation

As one of the most promising alternatives for future energy systems, the rechargeable Zn–air battery (ZAB) has attracted extensive attention due to its extraordinarily high theoretical specific energy density. However, several obstacles restrict its practical application. One challenge is the sluggish kinetics of oxygen-reduction reaction (ORR) and oxygen-evolution reaction (OER) in the discharging and charging processes of ZABs. In addition, when using unifunctional ORR or OER electrocatalysts as air electrodes, like noble metal catalysts (Pt/C or Ru/IrO₂), there are the disadvantages of high cost and poor stability. Therefore, rational design of non-noble metal bifunctional ORR/OER electrocatalysts with high activity and stability is essential for the development of ZABs. In this review, we discuss the latest developments of non-noble metal bifunctional ORR/OER electrocatalysts for ZABs. Firstly, the related reaction mechanisms of ORR and OER are introduced. Then, the latest developments of bifunctional ORR/OER materials for ZABs are discussed in detail from three aspects: (i) MOF-based catalysts, including pristine MOFs and their derivatives; (ii) metal-free-based carbon catalysts, including heteroatom-doped carbon and defective carbon; (iii) metal-based catalysts, including metal–nitrogen–carbon materials (such as metals/alloys, single-atom) and metal compound materials. Finally, some challenges and outlooks for the optimal design of bifunctional air electrodes for rechargeable ZABs with high activity and ultra-long lifetime are put forward.

中文翻译：

锌空气电池双功能电催化剂：最新进展和未来展望

作为未来能源系统最有希望的替代品之一，可充电锌空气电池（ZAB）由于其极高的理论比能量密度而引起了广泛关注。然而，一些障碍限制了其实际应用。一项挑战是在ZAB的放电和充电过程中，氧还原反应（ORR）和氧释放反应（OER）的动力学缓慢。此外，当使用单功能ORR或OER电催化剂作为空气电极时，像贵金属催化剂（Pt / C或Ru / IrO ₂），还有成本高和稳定性差的缺点。因此，合理设计具有高活性和稳定性的非贵金属双功能ORR / OER电催化剂对于ZAB的开发至关重要。在这篇综述中，我们讨论了用于ZAB的非贵金属双功能ORR / OER电催化剂的最新进展。首先介绍了ORR和OER的相关反应机理。然后，从三个方面详细讨论了用于ZAB的双功能ORR / OER材料的最新发展：（i）基于MOF的催化剂，包括原始的MOF及其衍生物。（ii）无金属基碳催化剂，包括掺杂杂原子的碳和有缺陷的碳；（iii）金属基催化剂，包括金属-氮-碳材料（例如金属/合金，单原子）和金属化合物材料。最后，

更新日期：2020-04-01

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