Coordinatively and Spatially Coconfining High-Loading Atomic Sb in Sulfur-Rich 2D Carbon Matrix for Fast K+Diffusion and Storage
文献类型：期刊论文
| 作者 | Yi, Zheng2; Jiang, Song2; Du, Yonghua1; Ma, Lu1; Qian, Yong2; Tian, Jie5; Jia, Chuankun4; Chen, Shimou3; Lin, Ning2; Qian, Yitai2 |
| 刊名 | ACS Materials Letters
 |
| 出版日期 | 2021-06-07 |
| 卷号 | 3期号:6页码:790-798 |
| 关键词 | Charging (batteries) - Storage (materials) - Sulfur - Chelation - Amorphous carbon - Graphene - Ions |
| DOI | 10.1021/acsmaterialslett.1c00253 |
| 英文摘要 | The atomically dispersed materials promise ultrafast redox kinetics for alkali-ion storage. However, their relatively low mass loading limits their application. Herein, well-dispersed Sb atoms with high-loading of 23.3 wt % anchored in sulfur-rich amorphous carbon-coated reduced graphene oxide matrix (SbSA/C) are prepared by a coordinative and spatial coconfinement methodology including freeze-casting the well-dissolved Sb-chelates (Sb-thioglycolate) within graphene oxide suspension and post heating-treatment. The reduced graphene oxide substrate features open two-dimensional spatial framework for loading atomically dispersive Sb species, and the pyrolyzed Sb-chelates would provide not only massive desirable heteroatoms (S, O) for coordinating the Sb atoms but also in situ pyrolytic carbon for further spatially separating those dispersive atoms. The coordinative and spatial coconfinement engineering also endows the SbSA/C composite with atomic-level Sb atoms against migration and agglomeration during electrochemical K-storage cycling. In situ TEM reveals the uniform potassiation behavior of the SbSA/C without obvious volume change; DFT calculation and electrochemical characterization suggest the significantly lower K-ion diffusion energy barrier. Therefore, on the basis of both the active Sb center and the coordinative heteroatom, the SbSA/C electrode delivers high fast-charging capacity, outstanding rate capability and long-lifespan performance in half/full K-ion batteries (e.g., a stable capacity of 331.3 mA h g-1 is maintained over 1100 cycles at 1.0 A g-1 for half-cell). 漏 2021 American Chemical Society. |
| 学科主题 | Atoms |
| 项目编号 | This work is financial supported by the National Natural Science Foundation of China (No. 22075268, 21701163, 21671181, and 21831006), and Anhui Provincial Natural Science Foundation (No. 1808085QB25). This research used resources 7-BM of the National Synchrotron Light Source II, U.S. The DFT calculations were performed on the supercomputing system in the Supercomputing Center of USTC. |
| 出版者 | American Chemical Society |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/60365]  |
| 作者单位 | 1.National Synchrotron Light Source II, Brookhaven National Laboratory, Upton; NY; 11973, United States 2.Department of Applied Chemistry, Hefei National Laboratory for Physical Science at Micro-scale, University of Science and Technology of China, Anhui, Hefei; 230026, China 3.Beijing Key Laboratory of Ionic Liquid Clean Process, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 4.College of Material Science and Engineering, Changsha University of Science and Technology, Hunan, Changsha; 410114, China 5.Experimental Center of Engineering and Material Science, University of Science and Technology of China, Anhui, Hefei; 230026, China |
| 推荐引用方式 GB/T 7714 | Yi, Zheng,Jiang, Song,Du, Yonghua,et al. Coordinatively and Spatially Coconfining High-Loading Atomic Sb in Sulfur-Rich 2D Carbon Matrix for Fast K+Diffusion and Storage[J]. ACS Materials Letters,2021,3(6):790-798. |
| APA | Yi, Zheng.,Jiang, Song.,Du, Yonghua.,Ma, Lu.,Qian, Yong.,...&Qian, Yitai.(2021).Coordinatively and Spatially Coconfining High-Loading Atomic Sb in Sulfur-Rich 2D Carbon Matrix for Fast K+Diffusion and Storage.ACS Materials Letters,3(6),790-798. |
| MLA | Yi, Zheng,et al."Coordinatively and Spatially Coconfining High-Loading Atomic Sb in Sulfur-Rich 2D Carbon Matrix for Fast K+Diffusion and Storage".ACS Materials Letters 3.6(2021):790-798. |
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来源：过程工程研究所
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