Effcient polysulfdes trapping and redox enabled by Co/N-carbon implanted Li+-montmorillonite for advanced lithium-sulfur batteries | |
Department | 环境材料与生态化学研究发展中心 |
Yang, Yanfei1; Meng, Guilin1,2; Wang, Hongli1,2; Wang, Wankai1,2; Zhang, Junping1,2 | |
The second department | 硅基功能材料组 |
2023 | |
Source Publication | Chemical Engineering Journal |
Issue | 451Pages:138914 |
Abstract | Li-S batteries are very promising next-generation energy storage systems due to their high theoretical capacity and energy density, but suffer from sluggish redox kinetics and serious polysulfdes (PS) shuttle. Herein, Co/Ncarbon implanted Li+-montmorillonite (Co/N–C@Li-MMT) is designed to inhibit PS shuttle and maximize PS redox kinetics in Li-S battery. The Co/N–C@Li-MMT 2D nanomaterial is fabricated by exfoliation of the Li-MMT nanosheets using melamine and Co(II)(acac)2, followed by one-step thermal reduction. The exfoliated Co/N–C@Li-MMT with high Li+ and electrical conductivity can expose abundant active sites for effcient PS adsorption via Co-S and Si-S and Li bonds and for fast PS electrocatalytic conversion via Co and Co–N–C catalytic active sites. The Co/N–C@Li-MMT modifed PP (Co/N–C@Li-MMT@PP) separator with a thin Co/N–C@Li-MMT layer of 2.2 μm (0.3 mg cm- 2 mass loading) features high Li+ conductivity, fast Li+ diffusion, superior electrolyte wettability as well as effcient PS trapping and fast PS redox kinetics as verifed by various analytical techniques. Consequently, the Li-S battery with the Co/N–C@Li-MMT@PP separator shows high initial capacity (1447 mAh/g), good rate performance, excellent cycling stability (0.027 % capacity fade per cycle at 1C over 300 cycles) and ultralow self-discharge. |
DOI | doi.org/10.1016/j.cej.2022.138914 |
Indexed By | SCI |
If | 16.744 |
Language | 英语 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/29573 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) 环境材料与生态化学研究发展中心 |
Corresponding Author | Zhang, Junping |
Affiliation | 1.中国科学院兰州化学物理研究所 2.中国科学院大学 |
Corresponding Author Affilication | Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences |
Recommended Citation GB/T 7714 | Yang, Yanfei,Meng, Guilin,Wang, Hongli,et al. Effcient polysulfdes trapping and redox enabled by Co/N-carbon implanted Li+-montmorillonite for advanced lithium-sulfur batteries[J]. Chemical Engineering Journal,2023(451):138914. |
APA | Yang, Yanfei,Meng, Guilin,Wang, Hongli,Wang, Wankai,&Zhang, Junping.(2023).Effcient polysulfdes trapping and redox enabled by Co/N-carbon implanted Li+-montmorillonite for advanced lithium-sulfur batteries.Chemical Engineering Journal(451),138914. |
MLA | Yang, Yanfei,et al."Effcient polysulfdes trapping and redox enabled by Co/N-carbon implanted Li+-montmorillonite for advanced lithium-sulfur batteries".Chemical Engineering Journal .451(2023):138914. |
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