Nature-inspired Three-dimensional Au/Spinach as a Binder-free and Self-standing Cathode for High-performance Li-O_(2) Batteries  

作　　者：WANG Yue WANG Xiaoxue SHE Ping GUAN Dehui SONG Lina XU Jijing 

机构地区：[1]State Key Laboratory of Inorganic Synthesis&Preparative Chemistry,Jilin University,Changchun 130012,P.R.China [2]International Center of Future Science,Jilin University,Changchun 130012,P.R.China

出　　处：《Chemical Research in Chinese Universities》2022年第1期200-208,共9页高等学校化学研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.51771177,51972141,21835002,21621001);the"111"Project of China(No.B17020);the Project of the Education Department of Jilin Province,China(No.JJKH20190113KJ);the Jilin Province Science and Technology Development Program,China(No.20190303104SF);the Jilin Province/Jilin University Co-construction Project-Funds for New Materials,China(No.SXGJSF2017-3);the Science and Technology Breakthrough Plan of Henan Province,China(Nos.202102210242,212102210186);the Key Scientific Research Project of Higher Education of Henan Province,China(No.21A150055);the Post Doctoral Innovative Talent Support Program,China(No.BX20180122);the China Postdoctoral Science Foundation,China(No.2019M651195).

摘　　要：Design and fabrication of functional porous air cathode materials with superior catalytic activity is still the key point for non-aqueous lithium-oxygen(Li-O2) batteries. Herein, inspired by the self-standing three-dimensional(3D) structure of the natural spinach leaves, a unique binder-free and self-standing porous Au/spinach cathode for high-performance Li-O2 batteries has been developed. The carbonized spinach leaves serve as a superconductive current collector and an ideal porous host for accommodating catalysts. The Au/spinach cathode could offer enough spaces for accommodating the discharge products, shorten the distance of the oxygen and electrolyte diffusion, and promote the oxygen reduction reaction(ORR) and oxygen evolution reaction (OER) processes. This optimized Au/spinach cathode achieved a high specific area capacity of 7.23 mA‧h/cm2 at a current density of 0.05 mA/cm2 and exhibited excellent stability(280 cycles at 0.05 mA/cm2 with a fixed capacity of 0.2 mA‧h/cm2). The superior performance encourages the construction of more advanced cathode architectures by the use of bio-composites for Li-O2 batteries.

关 键 词：Li-O_(2)battery Carbon derivation Nature-inspired structure Natural spinach leaf Superior performance 

分 类 号：TM91[电气工程—电力电子与电力传动]