Interfacial engineering of lithium‐polymer batteries with in situ UV cross‐linking. Issue 9 (11th May 2021)

• Record Type: Journal Article
• Authors: Rojaee, Ramin; Plunkett, Samuel; Rasul, Md Golam; Cheng, Meng; Jabbari, Vahid; Shahbazian‐Yassar, Reza
• Is Part Of: InfoMat. Volume 3:Issue 9(2021)
• Page Start: 1016
• Page End: 1027
• Publication Date: 2021-05-11
• Subjects: electrochemical impedance spectroscopy -- interfacial engineering -- lithium batteries -- self‐standing polymer electrolyte; Materials -- Periodicals; Information technology -- Periodicals; Smart materials -- Periodicals; 620.11
• DOI: 10.1002/inf2.12197
• Languages: English
• ISSNs: 2567-3165

Abstract

Abstract: Developing promising solid‐state Li batteries with capabilities of high current densities have been a major challenge partly due to large interfacial resistance across the electrode/electrolyte interfaces. This work represents an integrated network of self‐standing polymer electrolyte and active electrode materials with in situ UV cross‐linking. This method provides a uniform morphology of composite polymer electrolyte with low thickness of 20–40 μm. This modification leads to promising cycling results with 85% specific capacity retention in Li||LiFePO4 cell over 100 cycles at high current densities of 170 mA g −1 (~25 μA cm −2, 1 C). By applying this method, the interfacial resistance decreases as high as seven folds compared to noncross‐linked interfaces. The following work introduce a facile and cost‐effective method in developing fast‐charging self‐standing polymer batteries with enhanced electrochemical properties. Abstract : This work focuses on novel interfacial engineered electrode/electrolyte design to address slow Li+ ion transport and undesired degradation reaction at the electrode/self‐standing polymer electrolyte interfaces. The in situ UV crosslinked integrated network of electrolyte and active electrode materials provides a uniform morphology of composite polymer electrolyte with a low thickness of 20–40 um. This modification provides promising cycling results and provided 70% capacity retention over 100 cycles at high current densities of 170 mA g −1