文献类型：期刊文献

英文题名：Highly nitrogen doped carbon nanofibers with superior rate capability and cyclability for potassium ion batteries

作者：Xu, Yang[1,2];Zhang, Chenglin[3];Zhou, Min[1,2];Fu, Qun[3];Zhao, Chengxi[4,5];Wu, Minghong[3];Lei, Yong[1,2]

机构：[1]Tech Univ Ilmenau, Inst Phys, D-98693 Ilmenau, Germany;[2]Tech Univ Ilmenau, IMN MacroNano ZIK, D-98693 Ilmenau, Germany;[3]Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[4]East China Univ Sci & Technol, Dept Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2018

卷号：9

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000431113000008)】；

基金：This work was financially supported by the European Research Council (ThreeDsurface, 240144, and HiNaPc, 737616), BMBF (ZIK-3DNanoDevice, 03Z1MN11), German Research Foundation (DFG: LE 2249_4-1), National Natural Science Foundation of China (21577086 and 41430644), the Shanghai Thousand Talent Plan, and Program for Changjiang Scholars and Innovative Research Team in University (IRT13078).

语种：英文

摘要：Potassium-ion batteries are a promising alternative to lithium-ion batteries. However, it is challenging to achieve fast charging/discharging and long cycle life with the current electrode materials because of the sluggish potassiation kinetics. Here we report a soft carbon anode, namely highly nitrogen-doped carbon nanofibers, with superior rate capability and cyclability. The anode delivers reversible capacities of 248 mAh g(-1) at 25 mA g(-1) and 101 mAh g(-1) at 20 A g(-1), and retains 146 mAh g(-1) at 2 A g(-1) after 4000 cycles. Surface-dominated K-storage is verified by quantitative kinetics analysis and theoretical investigation. A full cell coupling the anode and Prussian blue cathode delivers a reversible capacity of 195 mAh g(-1) at 0.2 A g(-1). Considering the cost-effectiveness and material sustainability, our work may shed some light on searching for K-storage materials with high performance.