文献类型：期刊文献

英文题名：Carbon Dots@rGO Paper as Freestanding and Flexible Potassium-Ion Batteries Anode

作者：Zhang, Erjin[1];Jia, Xinxin[1];Wang, Bin[2];Wang, Jue[3];Yu, Xinzhi[1];Lu, Bingan[1,4]

第一作者：Zhang, Erjin

通讯作者：Lu, BG[1];Lu, BG[2]

机构：[1]Hunan Univ, Sch Phys & Elect, State Key Lab Adv Design & Mfg Vehicle Body, Hunan Prov Key Lab MultiElectron Based Energy Sto, Changsha 410082, Peoples R China;[2]Xinxiang Univ, Phys & Elect Engn Dept, Xinxiang 453003, Henan, Peoples R China;[3]Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China;[4]Fujian Strait Res Inst Ind Graphene Technol, Quanzhou 362000, Peoples R China

第一机构：Hunan Univ, Sch Phys & Elect, State Key Lab Adv Design & Mfg Vehicle Body, Hunan Prov Key Lab MultiElectron Based Energy Sto, Changsha 410082, Peoples R China

通讯机构：[1]corresponding author), Hunan Univ, Sch Phys & Elect, State Key Lab Adv Design & Mfg Vehicle Body, Hunan Prov Key Lab MultiElectron Based Energy Sto, Changsha 410082, Peoples R China;[2]corresponding author), Fujian Strait Res Inst Ind Graphene Technol, Quanzhou 362000, Peoples R China.

年份：2020

卷号：7

期号：15

外文期刊名：ADVANCED SCIENCE

收录：;EI(收录号：20202508848145);Scopus(收录号：2-s2.0-85088910756);WOS:【SCI-EXPANDED(收录号:WOS:000540467800001)】；

基金：This work was supported by grants from the National Natural Science Foundation of China (No. 51672078), Hunan Natural Science Foundation (No. 2019JJ40031), Henan Science and Technology Public Relations Project (No. 192102310467), and the Joint Foundation for Fostering Talents of NSFC-Henan Province (No. U1904198).

语种：英文

外文关键词：carbon dots; flexible anodes; freestanding hybrid architecture; microwaves; potassium-ion battery anodes; reduced graphene oxide

摘要：Carbonaceous materials, especially with graphite-layers structure, as anode for potassium-ion batteries (PIBs), are the footstone for industrialization of PIBs. However, carbonaceous materials with graphite-layers structure usually suffer from poor cycle life and inferior stability, not to mention freestanding and flexible PIBs. Here, a freestanding and flexible 3D hybrid architecture by introducing carbon dots on the reduced graphene oxide surface (CDs@rGO) is synthesized as high performance PIBs anode. The CDs@rGO paper has efficient electron and ion transfer channels due to its unique structure, thus enhancing reaction kinetics. In addition, the CDs provide abundant defects and oxygen-containing functional groups, which can improve the electrochemical performance. This freestanding and flexible anode exhibits the high capacity of 310 mAh g(-1)at 100 mA g(-1), ultra-long cycle life (840 cycles with a capacity of 244 mAh g(-1)at 200 mA g(-1)), and excellent rate performance (undergo six consecutive currents changing from 100 to 500 mA g(-1), high capacity 185 mAh g(-1)at 500 mA g(-1)), outperforming many existing carbonaceous PIB anodes. The results may provide a starting point for high-performance freestanding and flexible PIBs and promote the rapid development of next-generation flexible batteries.