γ-MnO_(2) nanorod-assembled hierarchical micro-spheres with oxygen vacancies to enhance electrocatalytic performance toward the oxygen reduction reaction for aluminum-air batteries

作     者：Ge Huo Xue-Wan Wang Zhi-Bin Zhang Zhongxin Song Xiao-Min Kang Ming-Xing Chen Qi Wang Xian-Zhu Fu Jing-Li Luo Ge Huo;Xue-Wan Wang;Zhi-Bin Zhang;Zhongxin Song;Xiao-Min Kang;Ming-Xing Chen;Qi Wang;Xian-Zhu Fu;Jing-Li Luo

作者机构：College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic Engineering.Shenzhen UniversityShenzhen 518060GuangdongChina Department of Chemical and Materials EngineeringUniversity of AlbertaEdmontonAlberta T6G 2G6Canada 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2020年第29卷第12期

页      面：81-89页

核心收录：

学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China (21975163  51902204) 

主　　题：γ-MnO2 Oxygen vacancy ORR electrocatalysts Al-air battery 

摘      要：γ-MnO2 nanorod-assembled hierarchical micro-spheres with abundant oxygen defects are synthesized by a simple thermal treatment approach as oxygen reduction electrocatalysts for Al(aluminum)-air batteries. The rich oxygen vacancies on the surface of γ-MnO2 are verified by morphology, structure,electron paramagnetic resonance(EPR) and X-ray photoelectron spectroscopy(XPS) results. The oxygen reduction reaction(ORR) electrocatalytic activity of γ-MnO2 is significantly improved by the incoming oxygen vacancies. The γ-MnO2 nanorod-assembled hierarchical micro-spheres calcined under 300 °C in Ar atmosphere show the best ORR performance. The primary Al-air batteries using γ-MnO2 catalysts as the cathode, which demonstrates excellent peal power density of 318 m W cm^(-2) when applying theγ-MnO2 catalysts with optimal amount of oxygen vacancies.