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Bifunctional electrocatalysts for Zn–air batteries
Sustainable Energy & Fuels ( IF 5.6 ) Pub Date : 2017-11-07 00:00:00 , DOI: 10.1039/c7se00413c
E. Davari 1, 2, 3, 4 , D. G. Ivey 1, 2, 3, 4
Affiliation  

Rechargeable metal–air batteries have recently attracted significant attention because of their high theoretical energy output and low cost. Among metal–air batteries, Zn–air batteries (ZABs) have garnered renewed interest as one of the most viable future options to power energy grids and electric vehicles. However, the slow oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics represent a limiting factor for the energy conversion efficiency of state-of-the-art ZABs. The focus of this review is the latest advances related to the development of non-precious metal catalysts. Four groups of bifunctional catalysts used in primary/secondary ZABs are reviewed. These include transition metal oxides (single/mixed-metal oxides, spinels and perovskites), transition metals, carbon-based materials and precious metals/alloys. ZAB electrochemistry and challenges originating from individual components of the system, such as the Zn electrodes, electrolytes and separators, are also outlined. In addition, the design and architecture of the air-electrode are discussed for future development of ZABs.

中文翻译:

锌空气电池的双功能电催化剂

可充电金属空气电池由于其理论上的高能量输出和低成本而受到了广泛的关注。在金属空气电池中,锌空气电池(ZAB)引起了人们的重新关注,因为它是未来为能源网和电动汽车供电的最可行的选择之一。然而,缓慢的氧还原反应(ORR)和氧释放反应(OER)动力学是现有ZAB能量转换效率的限制因素。这篇综述的重点是与非贵金属催化剂开发有关的最新进展。综述了在一级/二级ZAB中使用的四组双功能催化剂。这些包括过渡金属氧化物(单/混合金属氧化物,尖晶石和钙钛矿),过渡金属,碳基材料和贵金属/合金。还概述了ZAB电化学和源自系统各个组件(例如Zn电极,电解质和隔膜)的挑战。此外,还讨论了空气电极的设计和架构,以用于ZAB的未来开发。
更新日期:2017-11-07
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