Interfacial co-polymerization derived nitrogen-doped carbon enables high-performance carbon felt for vanadium flow batteries

doi:10.1039/d1ta03683a

IMR OpenIR

	Interfacial co-polymerization derived nitrogen-doped carbon enables high-performance carbon felt for vanadium flow batteries
	Zhang, Kaiyue 1,2; Yan, Chuanwei 1; Tang, Ao 1
通讯作者	Tang, Ao(a.tang@imr.ac.cn)
	2021-07-16
发表期刊	JOURNAL OF MATERIALS CHEMISTRY A
ISSN	2050-7488
页码	11
摘要	Nitrogen-doped carbon felt has exhibited great promise in enhancing the cycling performance and lifespan of vanadium flow batteries (VFBs). However, the fabrication of stable and high-performance nitrogen-doped carbon felt is still to a certain extent hindered by existing preparation processes. Herein, a two-step novel in situ interfacial co-polymerization strategy is proposed to construct microvillus-like nitrogen-doped carbon on carbon felt, which features excellent homogeneity, high doping content and controllable nitrogen type conversion. By adding polyethyleneimine into the polymerization reaction, the aggregation effect of polydopamine is corrected and more strongly bonded nitrogen atoms are introduced via covalent interactions, yielding a hierarchical electrode interface with a greatly enhanced pyridinic-N content. Electrochemical characterization studies show that the prepared electrode possesses superior reaction kinetics towards both VO2+/VO2+ and V2+/V3+ redox couples, which can also realize a facile mass-transfer process. First principles calculations at the atomic level further ascribe the promoted V2+/V3+ kinetics to the enhanced vanadium adsorption on pyridinic-N, while attributing the promoted VO2+/VO2+ kinetics to a remarkably reduced activation energy barrier associated with doped N atoms. Adopting the prepared electrodes, the VFB demonstrates a superior energy efficiency of 73.6% at 300 mA cm(-2), and achieves an excellent and long-term cycling stability over 600 cycles at 200 mA cm(-2) with an extremely low energy efficiency decay of 0.006% per cycle.
资助者	Natural Science Foundation of Liaoning Province ; Institute of Metal Research, Chinese Academy of Sciences
DOI	10.1039/d1ta03683a
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Liaoning Province[2020-MS-012] ; Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000680470600001
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/159678
专题	中国科学院金属研究所
通讯作者	Tang, Ao
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Kaiyue,Yan, Chuanwei,Tang, Ao. Interfacial co-polymerization derived nitrogen-doped carbon enables high-performance carbon felt for vanadium flow batteries[J]. JOURNAL OF MATERIALS CHEMISTRY A,2021:11.
APA	Zhang, Kaiyue,Yan, Chuanwei,&Tang, Ao.(2021).Interfacial co-polymerization derived nitrogen-doped carbon enables high-performance carbon felt for vanadium flow batteries.JOURNAL OF MATERIALS CHEMISTRY A,11.
MLA	Zhang, Kaiyue,et al."Interfacial co-polymerization derived nitrogen-doped carbon enables high-performance carbon felt for vanadium flow batteries".JOURNAL OF MATERIALS CHEMISTRY A (2021):11.