文献类型：期刊文献

英文题名：Hierarchically Structured Nitrogen-Doped Carbon Microspheres for Advanced Potassium Ion Batteries

作者：Ge, Junmin[3];Wang, Bin[5];Zhou, Jiang[1,2];Liang, Shuquan[1,2];Rao, Apparao M.[6];Lu, Bingan[3,4]

第一作者：Ge, Junmin

通讯作者：Zhou, J[1];Zhou, J[2];Lu, BG[3];Lu, BG[4]

机构：[1]Cent South Univ, Minist Educ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China;[2]Cent South Univ, Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Peoples R China;[3]Hunan Univ, Sch Phys & Elect, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China;[4]Fujian Strait Res Inst Ind Graphene Technol, Quanzhou 362000, Peoples R China;[5]Xinxiang Univ, Phys & Elect Engn Dept, Xinxiang 453003, Henan, Peoples R China;[6]Clemson Univ, Coll Sci, Clemson Nanomat Inst, Clemson, SC 29634 USA

第一机构：Cent South Univ, Minist Educ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

通讯机构：[1]corresponding author), Cent South Univ, Minist Educ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China;[2]corresponding author), Cent South Univ, Minist Educ, Key Lab Nonferrous Met Mat Sci & Engn, Changsha 410083, Peoples R China;[3]corresponding author), Hunan Univ, Sch Phys & Elect, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China;[4]corresponding author), Fujian Strait Res Inst Ind Graphene Technol, Quanzhou 362000, Peoples R China.

年份：2020

卷号：2

期号：7

起止页码：853-860

外文期刊名：ACS MATERIALS LETTERS

收录：;EI(收录号：20203209010998);Scopus(收录号：2-s2.0-85088956743);WOS:【SCI-EXPANDED(收录号:WOS:000548457500025)】；

基金：This work was financially supported by National Nature Science Foundation of China (Nos. 51922038 and 51672078), Hunan Outstanding Youth Talents (No. 2019JJ20005) and Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project (No. 71675004) Hunan Youth Talents (2016RS3025), and Foundation of State Key Laboratory of Coal Conversion (Grant No. J17-18-903), and the Hunan Provincial Innovation Foundation for Postgraduate (No. CX20190276). A.M.R. gratefully acknowledges funding support through the SC EPSCoR/IDeA Program under Award 18-SR03 and the NASA EPSCoR Program under Award NNH17ZHA002C.

语种：英文

摘要：Because of their unique properties, microstructured carbons have received widespread attention in various fields, such as energy storage, medicine, and biosensors. In this study, hierarchically structured nitrogen-doped carbon microspheres (CMSs) are synthesized for use as electrodes in a potassium ion battery (PIBs). Compared to traditional carbon nanomaterials, the CMSs possess rich internal structure, which not only provide additional active sites and better electron transport but also mitigate the volume expansion related challenges caused by potassium ion intercalation. As the anode material for PIBs, the CMSs could deliver high reversible discharge capacities of 328 and 125 mAh g(-1) at 100 and 3000 mA g(-1), respectively. Moreover, the CMSs anodes also exhibit durable cycling performance with a remaining capacity of 136 mAh g(-1) even after 10000 cycles at a high current density of 2000 mA g(-1). Notably, a full cell assembled with the CMSs anode and an organic cathode exhibits excellent electrochemical characteristics with 78% capacity retention after 1900 cycles at 500 mA g(-1), and high energy and power densities of 141Wh kg(-1) and 4382 W kg(-1), respectively. Considering the rich microstructure of CMSs and their facile synthesis method, this study delineates the merits of employing CMSs in battery applications over other electrode materials.