摘要
Lithium-oxygen(Li-O_(2))batteries have attracted considerable attention due to their high theoretical energy density.However nonrenewable and high-cost electrode materials have limited their progress.Herein,the authors design and fabricate a three-dimensional freestanding bi-biomass egg-sugarcane(Egg-SC)electrode with excellent structure and performance as the cathode for Li-O_(2) batteries.The open,interconnected microchannels derived from the natural SC can provide sufficient pathways for O_(2) gas diffusion.The heteroatom-doped hollow carbon spheres(HD-HCS)obtained via biomass egg supply many of the triphase active sites for the formation and decomposition of the discharge products of Li2O_(2).Benefiting from the unique nature and structure of the cathode,Li-O_(2) batteries show high-rate capacity of 8.07 mAh cm^(-2) and superior cycle stability of 294 cycles at a current density of 0.1 mA cm^(-2).The excellent performance and structure of the bi-biomass cathode possess great application potential in nature-inspired materials design for the cathodes of Li-O_(2) batteries.
基金
This study was financially supported by the National Natural Science Foundation of China(grant nos.51771177,51972141,21835002,and 21621001)
the 111 Project(no.B17020)
the Department of Education of Jilin Province(no.JJKH20190113KJ)
the Jilin Province Science and Technology Development Program(grant no.20190303104SF)
the Jilin Province/Jilin University Co-construction Project for New Materials(no.SXGJSF2017-3)
the Science and Technology Breakthrough Plan of Henan Province(no.202102210242)
the Youth Innovation Fund project of Zhengzhou Institute of Technology(no.QNCXJJ2019K2).
