التفاصيل البيبلوغرافية
| العنوان: |
CoNi-based Bimetal-organic Framework Derived Carbon Composites Multifunctionally Modified Separators for Lithium-Sulfur Batteries. |
| Alternate Title: |
CoNi 基双金属-有机骨架衍生碳复合材料多功能改性锂硫电池隔膜. (Chinese) |
| المؤلفون: |
Yan-Jie Wang, Hong-Yu Cheng, Ji-Yue Hou, Wen-Hao Yang, Rong-Wei Huang, Zhi-Cong Ni, Zi-Yi Zhu, Ying Wang, Ke-Yi Wei, Yi-Yong Zhang, Xue Li |
| المصدر: |
Journal of Electrochemistry; 2023, Vol. 29 Issue 3, p1-15, 15p |
| مصطلحات موضوعية: |
CARBON composites, LITHIUM sulfur batteries, MACHINE separators, THERMAL conductivity, IONIC conductivity |
| Abstract (English): |
The commercial application of lithium-sulfur batteries (LSB) is still limited by the irreversible capacity fading caused by the shuttle of lithium polysulfides (LIPS). To address this issue, a bimetal (nickel, cobalt)-organic framework (MOF) derived carbon, (Ni, Co)/C, was prepared to modify the separator. The multifunctionally modified separator effectively captures LIPS, ensuring the stability and reversibility of sulfur fixation, while providing catalytic activity and improving ionic conductivity. The cobalt metal has a larger coordination number, more pore structure distribution, larger specific surface area, more surface C=O, and smaller particle size to achieve a large and rapid chemical sulfur fixation. The high conductivity provided by nickel, and the catalytic activity and the ability to block LIPS shuttling enabled the reversibility of sulfur inhibition. The synergistic effect of cobalt-nickel bimetals significantly improves the cycling stability and rate capability of LSB. At a current density of 1 C, the capacity of the (Ni, Co)/C modified separator battery could reach 1035.6 mAhg-1 in the first cycle, the capacity remained at 662.2 mAhg-1 after 500 cycles, and the capacity retention rate was 63.9%. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
严重的多硫化物穿梭效应和转化缓慢等问题导致锂硫电池容量迅速衰减,其大规模应用受限. 本文将金 属有机框架材料(MOF)衍生碳(Ni,Co)/C 用于锂硫电池隔膜改性,很好地解决了上述问题. 钴镍双金属的 协同作用分别实现了大量又快速的化学固硫和抑硫的可逆性,显著提高了锂硫电池的循环稳定性和倍率性 能. 在1C 的电流密度下,(Ni,Co)/C 改性隔膜电池的容量在第1次循环时可以达到1035.6mAh.g-1,在500 次循环后容量仍保持662.2mAh.g-1,容量保持率为63.9%. 此外,本工作克服了二元金属基 MOF 制备难 的问题,使用简单快速的室温液相合成法制备了柱状镍钴二元MOF,该法有望实现 MOF 的宏观制备 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
