Highly polar CoP/Co_(2)P heterojunction composite as efficient cathode electrocatalyst for Li-air battery  

作　　者：Miaomiao Li Mengwei Yuan Xingzi Zheng Kunyu Han Genban Sun Fujun Li Huifeng Li 

机构地区：[1]Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Beijing Normal University,Beijing 100875,China [2]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),College of Chemistry,Nankai University,Tianjin 300071,China [3]Center for Advanced Materials Research,Beijing Normal University,Zhuhai 519087,China

出　　处：《Chinese Chemical Letters》2024年第9期486-490,共5页中国化学快报（英文版）

基　　金：supported by the National Science Foundations of China(Nos.21871028,22271018)。

摘　　要：In order to advance the commercialization of rechargeable Li-air batteries,it is of importance to explore cathode catalyst with efficient catalytic activity.Transition metal oxides have poor electrical conductivity,while cobalt phosphide has excellent electrical conductivity and large specific surface area.Nevertheless,its application in organic Li-air batteries has been much less studied,and the electrocatalytic activity desires to be further elevated.Here,CoP/Co_(2)P heterojunction composite with higher polarity was fabricated.The discharge product of high-polarity CoP/Co_(2)P had a new porous box-like morphology,which was easy to be decomposed and exposed more active sites.The highly polar CoP/Co_(2)P heterostructure composite had homogeneous pores,the synergistic effect existed between CoP and Co_(2)P,and the discharge product was porous box mixed with Li_(2)O_(2)and LiOH,which made CoP/Co_(2)P achieve high specific capacity of14632 m Ah/g and cycle stably 161 times when used as air electrode cathode catalyst.This work furnished a thought for the construction of cathode catalysts with efficient catalytic activity for Li-air batteries.

关 键 词：Li-air battery Cathode catalyst CoP/Co_(2)P Heterojunction structure High polarity 

分 类 号：TM911.41[电气工程—电力电子与电力传动] O643.36[理学—物理化学]