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- Title
Improved performance of lithium-sulfur battery by a functional separator design.
- Authors
Lu, Hai; Wang, Jinlei; Li, Tao; Du, Huiling; Yi, Dawei; Fang, Jing; Hong, Bo
- Abstract
A novel polyacrylamide/mixed carbon black-coated separator was fabricated for lithium-sulfur batteries. It is demonstrated that the coated separator greatly improves cell performance. Although a quite commonly elemental sulfur cathode was employed, Li-S cell loading the cathode and coated separator still delivers a reversible capacity of up to 688 mAh g−1 after 50 cycles, with a decay rate of only 0.0017% per cycle based on the second discharge. The coated separator restrains polysulfides by a combination of physical and chemical interaction, hence suppressing shuttle effect during cycling. Besides, the coating contributes a highly conductive and hydrophilic surface, increasing the utilization of active material and reducing charge-transfer resistance.
- Subjects
LITHIUM sulfur batteries; MACHINE separators; POLYACRYLAMIDE; POLYSULFIDES; PERFORMANCE of storage batteries
- Publication
Journal of Solid State Electrochemistry, 2018, Vol 22, Issue 3, p953
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-017-3808-8