Wood-derived freestanding integrated electrode with robust interface-coupling effect boosted bifunctionality for rechargeable zinc-air batteries  

作　　者：Benji Zhou Nengneng Xu Liangcai Wu Dongqing Cai Eileen HYu Jinli Qiao 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Environmental Science and Engineering,Donghua University,2999 Ren'min North Road,Shanghai,201620,China [2]College of Science,Donghua University,2999 Ren'min North Road,Shanghai,201620,China [3]Shanghai Institute of Pollution Control and Ecological Security,1515 North Zhongshan Road,Shanghai,200092,China [4]Department of Chemical Engineering,Loughborough University,Loughborough,LE113TU,UK

出　　处：《Green Energy & Environment》2024年第12期1835-1846,共12页绿色能源与环境（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(2022YF E0138900);National Natural Science Foundation of China(21972017);the Fundamental Research Funds for the Central Universities(2232022D-18);Shanghai Sailing Program(22YF1400700);the Chenguang Program of Shanghai Education Development Foundation and Shanghai Municipal Education Commission(22CGA37).

摘　　要：Fabricating non-noble metal-based carbon air electrodes with highly efficient bifunctionality is big challenge owing to the sluggish kinetics of oxygen reduction/evolution reaction(ORR/OER).The efficient cathode catalyst is urgently needed to further improve the performance of rechargeable zinc-air batteries.Herein,an activation-doping assisted interface modification strategy is demonstrated based on freestanding integrated carbon composite(CoNiLDH@NPC)composed of wood-based N and P doped active carbon(NPC)and CoNi layer double hydroxides(CoNiLDH).In the light of its large specific surface area and unique defective structure,CoNiLDH@NPC with strong interfacecoupling effect in 2D-3D micro-nanostructure exhibits outstanding bifunctionality.Such carbon composites show half-wave potential of 0.85 V for ORR,overpotential of 320 mV with current density of 10 mA cm^(-2) for OER,and ultra-low gap of 0.70 V.Furthermore,highly-ordered open channels of wood provide enormous space to form abundant triple-phase boundary for accelerating the catalytic process.Consequently,zinc-air batteries using CoNiLDH@NPC show high power density(aqueous:263 mW cm^(-2),quasi-solid-state:65.8 mW cm^(-2))and long-term stability(aqueous:500 h,quasi-solid-state:120 h).This integrated protocol opens a new avenue for the rational design of efficient freestanding air electrode from biomass resources.

关 键 词：Wood biomass Bifunctional air electrode Freestanding carbon composite Interface-coupling effect Zinc-air battery 

分 类 号：TM911.41[电气工程—电力电子与电力传动]