Improving catalytic activity of layered lithium transition metal oxides for oxygen electrode in metal-air batteries. (13th January 2020)

• Record Type: Journal Article
• Authors: Yan, Shanshan; Xue, Yejian; Li, Shihua; Shao, Guangjie; Liu, Zhaoping
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 3(2020)
• Page Start: 1846
• Page End: 1856
• Publication Date: 2020-01-13
• Subjects: Bifunctional electrocatalyst -- Oxygen evolution reaction -- Oxygen reduction reaction -- Lithium transition metal oxides -- Metal-air battery; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.11.081
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Lithium transition metal oxide has superior performance for oxygen evolution reaction (OER), while its activity for catalyzing oxygen reduction reaction (ORR) is too low to meet the demand of practical applications. Herein, the NCM-based (NCM, LiNi1/3 Co1/3 Mn1/3 O2 ) composite materials are prepared through the two steps method. The NCM-2 (Mn2 O3 /LiNi1/3 Co1/3 Mn1/3 O2 ) hybrid material demonstrates excellent ORR catalytic property and high OER catalytic performance, as well as the superior stability. Besides, with NCM-2 hybrid materials as catalysts of air cathode, the Al-air battery and Zn-air battery both exhibit higher power density. Therefore, based on results of Brunauer-Emmett-Teller and O2 temperature programmed desorption analysis, the improved catalytic performance ascribed to large specific surface area, pore structure and enhanced oxygen adsorption ability. In this work, the catalytic activity of lithium transition metal oxide has been improved, and a new method was provided to synthesize bifunctional catalysts for metal-air batteries. Highlights: Mn2 O3 /LiNi1/3 Co1/3 Mn1/3 O2 composite material was prepared by a facile method. As-prepared hybrid material has porous structure and large specific surface area. The composite material has high oxygen adsorption ability and capacity. Hybrid material is a good bifunctional catalyst to ORR/OER in metal-air battery.