The development of efficient and low-cost bifunctional oxygen catalysts is essential yet a challenge for zinc-air batteries(ZABs).Here,we prepared a pyrolysis-free 3-dimensional hybrid catalyst(COP-Fe@3DLDH)with bifun...The development of efficient and low-cost bifunctional oxygen catalysts is essential yet a challenge for zinc-air batteries(ZABs).Here,we prepared a pyrolysis-free 3-dimensional hybrid catalyst(COP-Fe@3DLDH)with bifunctional oxygen-catalytic activity by integrating layered double hydroxides(3D-LDH)and a fully conjugated iron phthalocyanine-based covalent organic polymer(COP-Fe).More hierarchically porous and larger specific surface area(170.4 m^(2) g^(−1))can effectively enhance the mass transfer process and active site exposure of cathode,allowing COP-Fe@3D-LDH to exhibit an outstanding peak power density(148.5 mW cm^(-2))and an ultralong lifespan(over 400 h at 10 mA cm^(-2))in ZABs.Accordingly,this work provides a new perspective to enhance the performance of pyrolysis-free catalysts in ZABs.展开更多
基金National Key Research and Development Program of China(2022YFB3807500)NSF of China(22220102003)+2 种基金Beijing Natural Science Foundation(JL23003)China Postdoctoral Science Foundation 2023TQ0020“Double-First-Class”construction projects(XK180301 and XK1804-02).
文摘The development of efficient and low-cost bifunctional oxygen catalysts is essential yet a challenge for zinc-air batteries(ZABs).Here,we prepared a pyrolysis-free 3-dimensional hybrid catalyst(COP-Fe@3DLDH)with bifunctional oxygen-catalytic activity by integrating layered double hydroxides(3D-LDH)and a fully conjugated iron phthalocyanine-based covalent organic polymer(COP-Fe).More hierarchically porous and larger specific surface area(170.4 m^(2) g^(−1))can effectively enhance the mass transfer process and active site exposure of cathode,allowing COP-Fe@3D-LDH to exhibit an outstanding peak power density(148.5 mW cm^(-2))and an ultralong lifespan(over 400 h at 10 mA cm^(-2))in ZABs.Accordingly,this work provides a new perspective to enhance the performance of pyrolysis-free catalysts in ZABs.
