Highly Dispersed Cobalt Nanoparticles Embedded in Nitrogen-Doped Graphitized Carbon for Fast and Durable Potassium Storage

作     者：Xiaodong Shi Zhenming Xu Cheng Han Runze Shi Xianwen Wu Bingan Lu Jiang Zhou Shuquan Liang Xiaodong Shi;Zhenming Xu;Cheng Han;Runze Shi;Xianwen Wu;Bingan Lu;Jiang Zhou;Shuquan Liang

作者机构：School of Materials Science and EngineeringCentral South UniversityChangsha 410083People’s Republic of China University of Michigan-Shanghai Jiao Tong University Joint InstituteShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Harvard John.A.Paulson School of Engineering and Applied SciencesHarvard University29 Oxford StreetCambridgeMA 02138USA School of Chemistry and Chemical EngineeringJishou UniversityJishou 416000People’s Republic of China School of Physics and ElectronicsState Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha 410082People’s Republic of China Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083People’s Republic of China 

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

年 卷 期：2021年第13卷第2期

页      面：1-12页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 070205[理学-凝聚态物理] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China(Grant No.51932011,51802356) Innovation-Driven Project of Central South University(No.2020CX024) the Research Support Fund of the Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology in Hunan Province(No.201809) the Program of Youth Talent Support for Hunan Province(2018RS3098) Hunan Provincial Innovation Foundation for Postgraduate(Grant No.CX2017B045) the Fundamental Research Funds for the Central Universities of Central South University(Grant No.2020zzts075). 

主　　题：Cobalt nanoparticles Nitrogen-doped graphitized carbon Co-N bonds Cycling stability Potassium-ion batteries 

摘      要：Potassium-ion batteries(KIBs)have great potential for applications in large-scale energy storage devices.However,the larger radius of K+leads to sluggish kinetics and inferior cycling performance,severely restricting its practical applicability.Herein,we propose a rational strategy involving a Prussian blue analogue-derived graphitized carbon anode with fast and durable potassium storage capability,which is constructed by encapsulating cobalt nanoparticles in nitrogen-doped graphitized carbon(Co-NC).Both experimental and theoretical results show that N-doping effectively promotes the uniform dispersion of cobalt nanoparticles in the carbon matrix through Co-N bonds.Moreover,the cobalt nanoparticles and strong Co-N bonds synergistically form a threedimensional conductive network,increase the number of adsorption sites,and reduce the diffusion energy barrier,thereby facilitating the adsorption and the diffusion kinetics.These multiple effects lead to enhanced reversible capacities of 305 and 208.6 mAh g^−1 after 100 and 300 cycles at 0.05 and 0.1 A g^−1,respectively,demonstrating the applicability of the Co-NC anode for KIBs.