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Regulating the N/B ratio to construct B, N co-doped carbon nanotubes on carbon felt for high-performance vanadium redox flow batteries

文献类型：期刊论文

作者Liu, Lansong1,2; Zhang, Xihao1,2; Zhang, Denghua1,2; Zhang, Kaiyue3; Hou, Shaoyu1; Wang, Shaoliang4; Zhang, Yifan1,2; Peng, Haiquan1; Liu, Jianguo1; Yan, Chuanwei1
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2023-10-01
卷号473页码:10
关键词N co-doped carbon nanotubes In -situ growth Electrode Vanadium redox flow batteries
ISSN号1385-8947
DOI10.1016/j.cej.2023.145454
通讯作者Liu, Jianguo(jgliu@imr.ac.cn)
英文摘要The heteroatom-doped carbon nanotubes hold great promise for improving the properties of carbon felt in vanadium redox flow batteries. However, the structure control and catalytic mechanisms of B, N co-doping are still insufficient. Herein, the precisely controllable B, N co-doped carbon nanotubes (BNCNTs) are constructed on the surface of carbon felt via an in-situ growth method. DFT calculations emphasize the significance of B, N codoping based on electron transfer promotion and vanadium adsorption enhancement. Subsequently, we regulate the N/B ratio (atomic ratio of N to B) to construct the BNCNTs with a reasonable tubular structure, and the optimal N/B ratio considerably enhances the electrode reaction kinetics. Benefiting from BNCNTs with the optimal N/B ratio, the battery adopting the prepared electrode can deliver an energy efficiency of 79.3% at 300 mA cm-2, and even achieve 68.7% energy efficiency at 500 mA cm-2. Furthermore, the batteries maintain an energy efficiency of around 80% at 300 mA cm-2 during 1000 long-term cycles, which demonstrates remarkable long-term cycle performance. This study reveals the catalytic mechanism of BNCNTs for V2+/V3+ and VO2+/VO2 + redox reactions, which can serve as a fundamental guide for further precise design of heteroatom co-doped carbon nanotubes electrode.
资助项目National Key R & D Program of China[2022YFB2404901] ; National Natural Science Foundation of China[21975267] ; Central Guidance on Local Science and Technology Development Fund of Liaoning Province[2022JH6/100100001]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001060384100001
出版者ELSEVIER SCIENCE SA
资助机构National Key R & D Program of China ; National Natural Science Foundation of China ; Central Guidance on Local Science and Technology Development Fund of Liaoning Province
源URL[http://ir.imr.ac.cn/handle/321006/179108]  
专题金属研究所_中国科学院金属研究所
通讯作者Liu, Jianguo
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
3.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Liaoning, Peoples R China
4.Natl Inst Clean and Low Carbon Energy, Beijing 102209, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Lansong,Zhang, Xihao,Zhang, Denghua,et al. Regulating the N/B ratio to construct B, N co-doped carbon nanotubes on carbon felt for high-performance vanadium redox flow batteries[J]. CHEMICAL ENGINEERING JOURNAL,2023,473:10.
APA Liu, Lansong.,Zhang, Xihao.,Zhang, Denghua.,Zhang, Kaiyue.,Hou, Shaoyu.,...&Yan, Chuanwei.(2023).Regulating the N/B ratio to construct B, N co-doped carbon nanotubes on carbon felt for high-performance vanadium redox flow batteries.CHEMICAL ENGINEERING JOURNAL,473,10.
MLA Liu, Lansong,et al."Regulating the N/B ratio to construct B, N co-doped carbon nanotubes on carbon felt for high-performance vanadium redox flow batteries".CHEMICAL ENGINEERING JOURNAL 473(2023):10.

入库方式： OAI收割

来源：金属研究所

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