2025-04-15 ワシントン州立大学(WSU)
<関連情報>
- https://news.wsu.edu/press-release/2025/04/15/corn-leads-to-improved-performance-in-lithium-sulfur-batteries/
- https://www.sciencedirect.com/science/article/abs/pii/S0378775324020986
リチウムイオン二次電池のシャトル効果を抑制するタンパク質-極性ポリマー中間膜の開発 An interpenetrated protein-polar polymer interlayer for suppressing shuttle effect in Li-S batteries
Ying Guo, Pedaballi Sireesha, Chenxu Wang, Lulu Ren, Chunhua Ying, Jin Liu, Wei-Hong Zhong
Journal of Power Sources Available online: 2 January 2025
DOI:https://doi.org/10.1016/j.jpowsour.2024.236145
Graphical abstract
Highlights
- An interlayer with an interpenetrating structure of zein and a polar polymer.
- The modified separator is created on a commercial separator.
- The separator shows enhanced thermal stability and wettability.
- The separator effectively traps polysulfides and enhances Li + transport.
- The Li-S battery with the separator shows improved capacity and cycling stability.
Abstract
Lithium-sulfur (Li-S) batteries are highly regarded as leading contenders to traditional lithium-ion batteries owing to their impressive energy density and low cost. Unfortunately, the serious issues such as shuttle effect of polysulfides and lithium dendrite growth hinder the practical application of Li-S batteries. Our previous investigation has demonstrated that natural protein exhibits considerable capability in improving of Li-S battery performance. Herein, zein (corn protein) and polyvinylidene fluoride-co-hexafluoropropylene (PVDF) are combined to create an interpenetrating structure (zein@PVDF) that works as an interlayer on a commercial separator. The results indicate that the zein@PVDF interlayer effectively enhances thermal stability, wettability, and polysulfide-trapping capability of the separator. Consequently, Li-S batteries equipped with the zein@PVDF-modified separator exhibit enhanced rate performance and extended cycle life. In particular, after 500 cycles, the battery with zein@PVDF-modified separator demonstrates a higher capacity retention rate (∼450 mAh g−1, ∼62 %) in comparison with that of Li-S cells with the commercial separator (∼150 mAh g−1, 16 %). This work provides a new pathway in the design of effective modifications of the separator for improving of performance Li-S batteries.
