Reversible Oxygen-Rich Functional Groups Grafted 3D Honeycomb-Like Carbon Anode for Super-Long Potassium Ion Batteries

作     者：Na Cheng Wang Zhou Jilei Liu Zhigang Liu Bingan Lu Na Cheng;Wang Zhou;Jilei Liu;Zhigang Liu;Bingan Lu

作者机构：School of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082People’s Republic of China School of Materials Science and EngineeringHunan UniversityChangsha 410082People’s Republic of China School of Physics and ElectronicsHunan UniversityChangsha 410082People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第9期

页      面：132-146页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21872045 and 21975069) the Key Project of Research and Development Plan of Hunan Province(Grant 2019SK2071) the Natural Science Foundation of Hunan Province(2020JJ4169) support from the Development and Reform Commission of Hunan Province 

主　　题：Honeycomb-like Super-long Carbon anode Potassium-ion batteries 

摘      要：Studies have found that oxygen-rich-containing functional groups in carbon-based materials can be used as active sites for the storage performance of K^(+),but the basic storage mechanism is still ***,we construct and optimize 3D honeycomb-like carbon grafted with plentiful COOH/C=O functional groups(OFGC)as anodes for potassium ion *** OFGC electrode with steady structure and rich functional groups can effectively contribute to the capacity enhancement and the formation of stable solid electrolyte interphase(SEI)film,achieving a high reversible capacity of 230 mAh g^(-1) at 3000 mA g^(-1) after 10,000 cycles(almost no capacity decay)and an ultra-long cycle time over 18 months at 100 mA g^(-1).The study results revealed the reversible storage mechanism between K^(+)and COOH/C=O functional groups by forming C-O-K ***,the in situ electrochemical impedance spectroscopy proved the highly reversible and rapid de/intercalation kinetics of K+in the OFGC electrode,and the growth process of SEI *** particular,the full cells assembled by Prussian blue cathode exhibit a high energy density of 113 Wh kg^(-1) after 800 cycles(calculated by the total mass of anode and cathode),and get the light-emitting diodes lamp and ear thermometer running.