Coupling interfaces between hollow carbon dodecahedrons and layered double hydroxides for high-performance rechargeable zinc-air batteries  

作　　者：Jing Zhang Luo Xu Yan Lin Baojian Xie Chunjie Li Tao Hu Ulla Lassi Ruguang Ma Chang Ming Li 

机构地区：[1]School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,China [2]School of Materials Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China [3]Research Unit of Sustainable Chemistry,University of Oulu,Oulu 90570,Finland

出　　处：《Frontiers of physics》2025年第1期105-116,共12页物理学前沿(英文版)

基　　金：support from the National Natural Science Foundation of China(No.52172058).

摘　　要：The rational design of high-performance bifunctional electrocatalysts toward both oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is critical for the development of high-efficiency zinc-air batteries(ZABs).Herein,we report a facile method to synthesize a bifunctional electrocatalyst(FeNC/LDHs),which consists of Fe-doped hollow carbon dodecahedron(FeNC)coupling with NiFe-layered double hydroxides(LDHs).The coupling integration of FeNC dodecahedra and LDH nanosheets enriches the electrochemically active surface area and modulates the electron redistribution via oxygen bridges between FeNC and LDHs,thus effectively improving electrocatalytic activity and exhibiting a small potential difference ofΔE=0.68 V during the ORR and OER process.The optimized FeNC/LDH-21 as a cathode in zinc-air batteries demonstrates a specific capacity of 810 mAh·g^(-1)at 10 mA·cm^(-2)and a power density of 85 mW·cm^(-2),and stable operation over 160 h.Moreover,the as-assembled solid-state flexible ZAB reaches a power density of 32.4 mW·cm^(-2)and maintains a stable charge-discharge process at different bending or hammering states.This work opens an avenue for the facile and large-scale synthesis of bifunctional electrocatalysts and would propel the practical application of ZABs.

关 键 词：metal-organic framework bifunctional electrocatalyst rechargeable zinc-air battery 

分 类 号：O64[理学—物理化学]