Vanadium atom modulated electrocatalyst for accelerated Li-S chemistry
文献类型：期刊论文
| 作者 | Yu, Songlin1; Sun, Yingjie5; Song, Lixian1; Cao, Xuan1; Chen, Le1; An, Xingtao5; Liu, Xiaohong4; Cai, Wenlong3; Yao, Tao2; Song, Yingze1 |
| 刊名 | NANO ENERGY
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 89页码:13 |
| ISSN号 | 2211-2855 |
| 关键词 | Li-S chemistry V-N-C electrocatalyst system Vanadium atom modulation engineering Polysulfide regulation Sulfur redox reaction kinetics |
| DOI | 10.1016/j.nanoen.2021.106414 |
| 通讯作者 | Song, Yingze(yzsong@swust.edu.cn) ; Zhang, Wei(zhangwei@cigit.ac.cn) |
| 英文摘要 | Extensive efforts have been made to attain practically viable Li-S batteries. Nevertheless, issues mainly pertaining to the notorious polysulfide shuttle and the sluggish sulfur redox kinetics remain in enhancing the energy density and cycling lifespan of batteries. Herein, we propose an atom-level modulation engineering strategy to design a new model electrocatalyst of V-N-C delicately integrating twinborn isolated vanadium atoms and ultra small-sized vanadium nitride (VN) nanoparticles in a carbonaceous framework for Li-S chemistry. Combining results from synchrotron X-ray three-dimensional nano-computed tomography (X-ray 3D Nano-CT), operando Raman and first-principles calculations, we conclude that, such a V-N-C electrocatalyst system synergizes the merits of highly efficient single atom V-N-C coordination (SAV-N-C) as well as site-rich VN centers, and thus effectively promotes both the formation and decomposition of Li2S during discharge and charge procedures, respectively. As a result, the highly active V-N-C electrocatalyst can enable superior rate capability and long-term cycling stability with a low decay of 0.052% per cycle up to 1000 cycles at 2 C. Furthermore, the designed S/V-N-C cathode still affords favorable electrochemical performances even under the scenarios of elevated sulfur loading (8.1 mg cm(-2)) and flexible pouch cell configurations, holding great promise in future practical implementation. |
| 资助项目 | Project of State Key Laboratory of Environment-Friendly Energy Materials (SWUST)[19FKSY16] ; Project of State Key Laboratory of Environment-Friendly Energy Materials (SWUST)[18ZD320304] ; Chongqing Talents Program[CQYC201905041] ; State Key Laboratory of Environment-Friendly Energy Materials (Mianyang, China) |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000709614100005 |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/14353]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Song, Yingze; Zhang, Wei |
| 作者单位 | 1.Southwest Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China 2.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China 3.Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China 4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 5.Hebei Univ Sci & Technol, Coll Sci, Shijiazhuang 050018, Hebei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Songlin,Sun, Yingjie,Song, Lixian,et al. Vanadium atom modulated electrocatalyst for accelerated Li-S chemistry[J]. NANO ENERGY,2021,89:13. |
| APA | Yu, Songlin.,Sun, Yingjie.,Song, Lixian.,Cao, Xuan.,Chen, Le.,...&Zhang, Wei.(2021).Vanadium atom modulated electrocatalyst for accelerated Li-S chemistry.NANO ENERGY,89,13. |
| MLA | Yu, Songlin,et al."Vanadium atom modulated electrocatalyst for accelerated Li-S chemistry".NANO ENERGY 89(2021):13. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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