FeSb@N-doped carbon quantum dots anchored in 3D porous N-doped carbon with pseudocapacitance effect enabling fast and ultrastable potassium storage

Li, Zhihui1,2; Gan, Qingmeng3; Zhang, Yifan1,2; Hu, Jing3; Liu, Peng1,2; Xu, Changhong1,2; Wu, Xibing1,2; Ge, Yilin1,2; Wang, Feng1,2; Yao, Qingrong1,2; Lu, Zhouguang3; Deng, Jianqiu1,2

2021-04-01

10.1007/s12274-021-3462-4

Nano Research   影响因子和分区

1998-0124

1998-0000

Potassium-ion batteries (PIBs) are promising next-generation energy storage candidates due to abundant resources and low cost. Sb-based materials with high theoretical capacity (660 mAh center dot g(-1)) and low working potential are considered as promising anode for PIBs. The remaining challenge is poor stability and slow kinetics. In this work, FeSb@N-doped carbon quantum dots anchored in three-dimensional (3D) porous N-doped carbon (FeSb@C/N subset of 3DC/N), a Sb-based material with a particular structure, is designed and constructed by a green salt-template method. As an anode for PIBs, it exhibits extraordinarily high-rate and long-cycle stability (a capacity of 245 mAh center dot g(-1) at 3,080 mA center dot g(-1) after 1,000 cycles). The pseudocapacitance contribution (83%) is demonstrated as the origin of high-rate performance of the FeSb@C/N subset of 3DC/N electrode. Furthermore, the potassium storage mechanism in the electrode is systematically investigated through ex-situ characterization techniques including ex-situ transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Overall, this study could provide a useful guidance for future design of high-performance electrode materials for PIBs.

potassium-ion batteries anode fesb alloy quantum dots high rate pseudocapacitance

SCI ; EI

英语

通讯

National Natural Science Foundation of China[51661009,21875097] ; Natural Science Foundation of Guangxi Province[2019GXNSFDA245014] ; Science and Technology Base and Talent Special Project of Guangxi Province[AD19245162] ; Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20200109141640095]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000644757200001

TSINGHUA UNIV PRESS

20211910325908

Anodes ; Carbon ; Carbon Quantum Dots ; Energy storage ; High resolution transmission electron microscopy ; Nanocrystals ; Potassium ; Semiconductor quantum dots ; Storage (materials) ; X ray photoelectron spectroscopy

Energy Storage:525.7 ; Alkali Metals:549.1 ; Storage:694.4 ; Electron Tubes:714.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Chemical Products Generally:804

Web of Science

1.Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Peoples R China
2.Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Guangdong Hong Kong Macao Joint Lab Photon Therma, Shenzhen 518055, Peoples R China

Li, Zhihui,Gan, Qingmeng,Zhang, Yifan,et al. FeSb@N-doped carbon quantum dots anchored in 3D porous N-doped carbon with pseudocapacitance effect enabling fast and ultrastable potassium storage[J]. Nano Research,2021,15:217-224.

Li, Zhihui.,Gan, Qingmeng.,Zhang, Yifan.,Hu, Jing.,Liu, Peng.,...&Deng, Jianqiu.(2021).FeSb@N-doped carbon quantum dots anchored in 3D porous N-doped carbon with pseudocapacitance effect enabling fast and ultrastable potassium storage.Nano Research,15,217-224.

Li, Zhihui,et al."FeSb@N-doped carbon quantum dots anchored in 3D porous N-doped carbon with pseudocapacitance effect enabling fast and ultrastable potassium storage".Nano Research 15(2021):217-224.