Catalytic Polysulfide Conversion and Physiochemical Confinement for Lithium-Sulfur Batteries
文献类型：期刊论文
| 作者 | Sun, Zixu; Vijay, Sudarshan; Heenen, Hendrik H.; Eng, Alex Yong Sheng; Tu, Wenguang; Zhao, Yunxing; Koh, See Wee; Gao, Pingqi; Seh, Zhi Wei; Chan, Karen |
| 刊名 | ADVANCED ENERGY MATERIALS
 |
| 出版日期 | 2020 |
| 卷号 | 10期号:22 |
| 关键词 | TOTAL-ENERGY CALCULATIONS METAL-ORGANIC FRAMEWORK RATIONAL DESIGN CARBON NITROGEN EFFICIENT CATHODE ELECTRODE HOST HETEROSTRUCTURES |
| DOI | 10.1002/aenm.201904010 |
| 英文摘要 | The lithium-sulfur (Li-S) battery is widely regarded as a promising energy storage device due to its low price and the high earth-abundance of the materials employed. However, the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox conversion result in inefficient sulfur utilization, low power density, and rapid electrode deterioration. Herein, these challenges are addressed with two strategies 1) increasing LiPS conversion kinetics through catalysis, and 2) alleviating the shuttle effect by enhanced trapping and adsorption of LiPSs. These improvements are achieved by constructing double-shelled hollow nanocages decorated with a cobalt nitride catalyst. The N-doped hollow inner carbon shell not only serves as a physiochemical absorber for LiPSs, but also improves the electrical conductivity of the electrode; significantly suppressing shuttle effect. Cobalt nitride (Co4N) nanoparticles, embedded in nitrogen-doped carbon in the outer shell, catalyze the conversion of LiPSs, leading to decreased polarization and fast kinetics during cycling. Theoretical study of the Li intercalation energetics confirms the improved catalytic activity of the Co4N compared to metallic Co catalyst. Altogether, the electrode shows large reversible capacity (1242 mAh g(-1) at 0.1 C), robust stability (capacity retention of 658 mAh g(-1) at 5 C after 400 cycles), and superior cycling stability at high sulfur loading (4.5 mg cm(-2)). |
| 学科主题 | Chemistry ; Energy & Fuels ; Materials Science ; Physics |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/19768]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Li, H (corresponding author), CINTRA CNRS NTU THALES, UMI 3288,Res Techno Plaza, Singapore 637553, Singapore. 2.Li, H (corresponding author), Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore. 3.Chan, KR (corresponding author), Tech Univ Denmark, Catalysis Theory Ctr, Dept Phys, DK-2820 Lyngby, Denmark. 4.Li, H (corresponding author), Nanyang Technol Univ, Sch Elect & Elect Engn, Ctr Micro Nanoelect NOVITAS, Singapore 639798, Singapore. |
| 推荐引用方式 GB/T 7714 | Sun, Zixu,Vijay, Sudarshan,Heenen, Hendrik H.,et al. Catalytic Polysulfide Conversion and Physiochemical Confinement for Lithium-Sulfur Batteries[J]. ADVANCED ENERGY MATERIALS,2020,10(22). |
| APA | Sun, Zixu.,Vijay, Sudarshan.,Heenen, Hendrik H..,Eng, Alex Yong Sheng.,Tu, Wenguang.,...&Li, Hong.(2020).Catalytic Polysulfide Conversion and Physiochemical Confinement for Lithium-Sulfur Batteries.ADVANCED ENERGY MATERIALS,10(22). |
| MLA | Sun, Zixu,et al."Catalytic Polysulfide Conversion and Physiochemical Confinement for Lithium-Sulfur Batteries".ADVANCED ENERGY MATERIALS 10.22(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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