Coupling interface constructions of hollow Co-Mo mixed multiple oxidation states heterostructure for high-performance aprotic Li-O_(2) battery  

作　　者：Xingzi Zheng Mengwei Yuan Jingshen Xu Zihan Li Caiyun Nan Genban Sun 

机构地区：[1]Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Beijing Normal University,Beijing 100875,China [2]Center for Advanced Materials Research,Beijing Normal University,Zhuhai 519087,China

出　　处：《Nano Research》2024年第5期4100-4107,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22271018,12304037);Talent introduction and scientific research funds of Beijing Normal University(No.310432107);Interdisciplinary Research Foundation for Doctoral Candidates of Beijing Normal University(No.BNUXKJC2216).

摘　　要：Constructing interfaces in heterostructures is effective for modulating the electronic properties of electrocatalysts.The hollow CoMoO_(4)-Co_(3)O_(4) heterostructure(HCMCH)was prepared as a bifunctional electrocatalyst for Li-O_(2) battery.The different components in CoMoO_(4)-Co_(3)O_(4) heterostructure presented the efficient coupling and enhanced the electrocatalytic activity for aprotic oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),in which it improved the obviously reduced overpotential of 300 mV(compared with the pure Ketjen black(KB)electrode),enhanced reversibility of 80%capacity retention after 6 full cycles and the superior cyclability of more than 200 cycles with an optimized strategy.The battery performance of the HCMCH was not only associated with the unique hollow structure and rich active sites but also with coupling interface constructions synergetic effects attaching to the improving conductivity and optimized the discharge conversion.These results suggested that this HCMCH electrocatalyst was a promising candidate for the Li-O_(2) battery and it gave a novel insight for high performance electrocatalyst designing.

关 键 词：Li-oxygen battery HETEROSTRUCTURE ELECTROCATALYST coupling interface 

分 类 号：O64[理学—物理化学]