Self-supported metal(Fe, Co, Ni)-embedded nitrogen-doping carbon nanorod framework as trifunctional electrode for flexible Zn-air batteries and switchable water electrolysis  

作　　者：Qiuyan Jin Liping Xiao Weidong He Hao Cui Chengxin Wang 

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Materials Science and Engineering,Sun Yat-sen University,Guangzhou,510275,China [2]The Key Laboratory of Low-Carbon Chemistry&Energy Conservation of Guangdong Province,Sun Yat-sen University,Guangzhou,510275,China

出　　处：《Green Energy & Environment》2023年第6期1644-1653,共10页绿色能源与环境（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grants Nos. 51972349, U1801255 and 91963210)。

摘　　要：To meet the practical demand of wearable/portable electronics, developing high-efficiency and durable multifunctional catalyst and in-situ assembling catalysts into electrodes with flexible features are urgently needed but challenging. Herein, we report a simple route to fabricate bendable multifunctional electrodes by in-situ carbonization of metal ion absorbed polyaniline precursor. Alloy nanoparticles encapsulated in graphite layer are uniformly distributed in the N-doping carbon nanorod skeleton. Profiting from the favorable free-standing structure and the cooperative effect of metallic nanoparticles, graphitic layer and N doped-carbon architecture, the trifunctional electrodes exhibit prominent activities and stability toward HER, OER and ORR. Notably, due to the protection of carbon layer, the electrocatalysts show the reversible catalytic HER/OER properties. The overall water splitting device can continuously work for 12 h under frequent exchanges of cathode and anode. Importantly, the bendable metal air batteries fabricated by self-supported electrode not only displays the outstanding battery performance,achieving a decent peak power density(125 mW cm^(-2)) and exhibiting favorable charge-discharge durability of 22 h, but also holds superb flexible stability. Specially, a lightweight self-driven water splitting unit is demonstrated with stable hydrogen production.

关 键 词：Trifunctional catalysts Self-supported electrodes Switchable water splitting Flexible Zn-air battery Self-powered system 

分 类 号：TQ127.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程] TM911.41[电气工程—电力电子与电力传动]