Bibliographic Details
| Title: |
ZrO2nanoparticle modified hierarchically porous carbon nanofibers for multifunctional separator with prominent confinement and excellent catalysis of lithium polysulfide for Li-S cell |
| Authors: |
Xiang, Hengying, Liu, Yarong, Wang, Hao, Song, Yunxuan, Deng, Nanping, Kang, Weimin |
| Source: |
Jouranl of Energy Storage; July 2024, Vol. 92 Issue: 1 |
| Abstract: |
Lithium‑sulfur (LiS) batteries can provide promise for next-generation energy storage attributed to their high energy density and cost-effectiveness. However, its commercialization process is hindered by challenges such as the “shuttle effect,” slow reaction kinetics, and lithium dendrite growth. In this study, zirconia-modified porous carbon nanofibers (ZrO2-PCNFs) are designed and prepared by high-efficiency electro-blown spinning combined with a pre-oxidation and carbonization process. The prepared PCNFs with outstanding electrical conductivity have sufficient space to adapt to significant volume changes and good physical confinement effects. More importantly, utilizing polar ZrO2electrostatic can strongly adsorb to negatively charged polysulfide anions (Sx2−), effectively anchoring lithium polysulfides (LiPSs) and catalyzing their rapid conversion for accelerating the conversion kinetics of LiPSs. Therefore, the ZrO2-PCNFs combine the advantages of high electrical conductivity, strong adsorption, and excellent conversion properties toward LiPSs. The modified separator has excellent lithium affinity and can also uniformly deposit lithium, reducing the growth of lithium dendrites. Combining these advantages, the ZrO2-PCNFs modified separator assembled LiS battery demonstrates a high initial discharge specific capacity of 1003.2 mAh g−1and maintains a capacity of 720.2 mAh g−1after 400 cycles, with a decay rate of only 0.07 % per cycle and conspicuous Coulombic efficiency of above 97.5 %. This research opens new avenues for designing high-performance LiS batteries through using modified separators. |
| Database: |
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