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Transitioning Towards Asymmetric Gel Polymer Electrolytes for Lithium Batteries: Progress and Prospects
邁向非對稱凝膠聚合物電解質在鋰電池中的應用:進展與前景


T. Agnihotri, S.A. Ahmed, E.B. Tamilarasan, R. Hasan, W.N. Su*, B.J. Hwang*
https://doi.org/10.1002/adfm.202311215
SEED Member: S.H. Wu, W.N. Su, B.J. Hwang

 

Schematic demonstration of (a) the Lewis acid–base formation between LPSC and Lewis acid additive. (b) Schematic illustration of LPSC-H2O reaction suppression using Lewis acid additives (c) to (h).

 

Major Contributions

1.Introducing Asymmetric Gel Polymer Electrolytes (ASGPEs) :
We proposed ASGPEs as a novel solution to overcome the limitations of symmetric gel polymer electrolytes (SGPEs). By designing a bilayer or gradient structure, we ensured that each side of the electrolyte is optimized for compatibility with either the cathode or anode. This innovation addresses the challenges of interfacial stability and enhances the multifunctionality of lithium batteries.

2.Advancing Polymer Chemistry for Enhanced Stability :
Our team developed tailored polymer chemistries to improve oxidative stability at the cathode and mechanical robustness at the anode. By incorporating specific polymers and additives, we achieved stable cathode electrolyte interfaces (CEI) and solid electrolyte interphases (SEI), effectively suppressing dendrite growth while maintaining high ionic conductivity.

3.Innovating Fabrication Techniques for ASGPEs :
We explored advanced fabrication methods, such as sequential coating and in-situ polymerization, to precisely engineer ASGPE structures. These techniques allowed us to enhance ionic conductivity, ensure uniformity, and improve the overall safety and longevity of lithium batteries.

4.Providing a Comprehensive Framework for Future Development :
Through this work, we conducted a thorough review of the transition from SGPEs to ASGPEs, analyzing their design, fabrication, and functionality. Our insights provide a systematic roadmap for researchers and industry stakeholders to develop next-generation lithium batteries with safer and more efficient gel polymer electrolytes.


主要貢獻

1.提出非對稱凝膠聚合物電解質(ASGPEs)的創新概念
我們提出了非對稱凝膠聚合物電解質(ASGPEs),作為解決對稱凝膠聚合物電解質(SGPEs)局限性的創新方案。ASGPEs 採用雙層或梯度結構設計,能針對鋰金屬負極和高壓正極的不同需求進行優化,有效提升界面穩定性並改善電池性能。

2.推進聚合物化學設計以增強穩定性
我們團隊開發了專門設計的聚合物化學結構,提升正極的抗氧化穩定性及負極的機械強度。通過引入特定聚合物和添加劑,我們實現了穩定的正極電解質界面(CEI)和固態電解質界面(SEI),有效抑制鋰枝晶生長並提高鋰離子傳導性。

3.創新ASGPE製備技術
我們探索並改進了包括順序塗覆和原位聚合在內的製備方法,精確控制ASGPE結構特性。這些技術不僅提高了離子導電率,還改善了電池的安全性和壽命。

4.提供ASGPE發展的全面框架
我們進行了一次深入的文獻回顧,系統分析了從SGPEs到ASGPEs的過渡過程,涵蓋其設計、製備及功能特性。我們的研究為未來開發更安全、高效的鋰電池提供了重要參考。