Covalent organic frameworks derived hollow structured N-doped noble carbon for asymmetric-electrolyte Zn-air battery

作     者：Pingwei Cai Xinxin Peng Junheng Huang Jingchun Jia Xiang Hu Zhenhai Wen 

作者机构：CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Science 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2019年第62卷第3期

页      面：385-392页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：supported by the 1000 Plan Professorship for Young Talents Hundred Talents Program of Fujian Province the Fujian Science and Technology Key Project (2016H0043) the National Natural Science Foundation of China (21703249, 21701175) 

主　　题：noble carbon oxygen reduction reaction asvmmetric-electrolyte Zn-air battery energy density 

摘      要：We report a relatively low-temperature molten salt strategy to prepare hollow structured N-doped noble carbon(h-NNC) with highly desirable features of ultra-large surface area(1957 m^2 g^(-1)) and high graphitization, endowing the h-NNC with high activity toward catalysis of oxygen reduction reaction in acidic medium. The h-NNC is applied as cathode catalyst of an asymmetrical-electrolyte Zn-air battery, which exhibits an open circuit voltage of 2.11 V, a power density up to 270 mW cm^(-2),and an energy density of 1279 W h kg^(-1), behaving advantages over the conventional Zn-air batteries.