A lithium passivated MoO3 nanobelt decorated polypropylene separator for fast-charging long-life Li–S batteries
Autor: | Jiang Ding, Syed Ali Abbas, Chih-Wei Chu, Karunakara Moorthy Boopathi, Shyankay Jou, Yu-Ting Chen, Hsin-An Chen, Jason Fang, Anisha Mohapatra, Sheng-Hui Wu, Nahid Kaisar, Chun-Wei Pao |
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Rok vydání: | 2019 |
Předmět: |
Polypropylene
Materials science Fabrication Ionic transfer 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering law General Materials Science 0210 nano-technology Dissolution Polysulfide Separator (electricity) |
Zdroj: | Nanoscale. 11:2892-2900 |
ISSN: | 2040-3372 2040-3364 |
Popis: | Dissolution of lithium polysulfide (LiPS) into the electrolyte during discharging, causing shuttling of LiPS from the cathode to the lithium (Li) metal, is mainly responsible for the capacity decay and short battery life of lithium-sulfur batteries (LSBs). Herein, we designed a separator comprising polypropylene (PP) coated with MoO3 nanobelts (MNBs), prepared through facile grinding of commercial MoO3 powder. The formation of Li2Sn-MoO3 during discharging inhibited the polysulfide shuttling; during charging, Li passivated LixMoO3 facilitated ionic transfer during the redox reaction by decreasing the charge transfer resistance. This dual-interaction mechanism of LiPS-with both Mo and the formation of LixMoO3-resulted in a substantially high initial discharge capacity at a very high current density of 5C, with 29.4% of the capacity retained after 5000 cycles. The simple fabrication approach and extraordinary cycle life observed when using this MNB-coated separator suggest a scalable solution for future commercialization of LSBs. |
Databáze: | OpenAIRE |
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