Zhang Yun-Long, Goh Kokswee, Zhao Lei, Sui Xu-Lei, Gong Xiao-Fei, Cai Jia-Jun, Zhou Qing-Yan, Zhang Hong-Da, Li Lin, Kong Fan-Rong, Gu Da-Ming, Wang Zhen-Bo
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150001, China.
Nanoscale. 2020 Nov 5;12(42):21534-21559. doi: 10.1039/d0nr05511e.
The catalyst in the oxygen electrode is the core component of the aqueous metal-air battery, which plays a vital role in the determination of the open circuit potential, energy density, and cycle life of the battery. For rechargeable aqueous metal-air batteries, the catalyst should have both good oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalytic performance. Compared with precious metal catalysts, non-precious metal materials have more advantages in terms of abundant resource reserves and low prices. Over the past few years, great efforts have been made in the development of non-precious metal bifunctional catalysts. This review selectively evaluates the advantages, disadvantages and development status of recent advanced materials including pure carbon materials, carbon-based metal materials and carbon-free materials as bifunctional oxygen catalysts. Preliminary improvement strategies are formulated to make up for the deficiency of each material. The development prospects and challenges facing bifunctional catalysts in the future are also discussed.
氧电极中的催化剂是水系金属空气电池的核心组件，在决定电池的开路电位、能量密度和循环寿命方面起着至关重要的作用。对于可充电水系金属空气电池而言，催化剂应具备良好的氧还原反应（ORR）和析氧反应（OER）催化性能。与贵金属催化剂相比，非贵金属材料在资源储量丰富和价格低廉方面具有更多优势。在过去几年中，人们在开发非贵金属双功能催化剂方面付出了巨大努力。本文综述有选择性地评估了包括纯碳材料、碳基金属材料和无碳材料在内的近期先进材料作为双功能氧催化剂的优缺点及发展现状。制定了初步的改进策略以弥补每种材料的不足。还讨论了双功能催化剂未来面临的发展前景和挑战。
