Development of a New Crosslinked Highly Conductive Hybrid Electrolyte based on Polyetherdiamine, Diphenylmethane Diisocyanate and Organosilanes for Efficient Lithium‐Metal Battery. Issue 12 (19th September 2022)

• Record Type: Journal Article
• Authors: Saikia, Diganta; Deka, Juti Rani; Zeng, Yu‐Hao; Chen, Yi‐Ching; Kao, Hsien‐Ming; Yang, Yung‐Chin
• Is Part Of: Batteries & supercaps. Volume 5:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-09-19
• Subjects: crosslinked organic-inorganic hybrid electrolyte -- diphenylmethane diisocyanate -- electrochemical stability -- ionic conductivity -- lithium-metal battery; Electrochemistry -- Periodicals; Electrodes -- Periodicals; Electric batteries -- Periodicals; 621.31242
• DOI: 10.1002/batt.202200290
• Languages: English
• ISSNs: 2566-6223

Abstract

Abstract: In this study, a new crosslinked organic‐inorganic hybrid polymer electrolyte membrane is developed by first reacting polyetherdiamine with diphenylmethane diisocyanate, followed by addition of organosilane precursors 3‐(glycidyloxypropyl) trimethoxysilane and 2‐[methoxy(polyethyleneoxy) propyl] trimethoxysilane and LiClO4 salt. Various characterization methods are employed to probe the crystallinity behavior, morphology, ionic interactions, thermal stability, architectural durability and dynamic performance of the hybrid solid polymer electrolyte (HSPE) membranes. Among the electrolytes, the HSPE membrane with [EO]/[Li] ratio of 32 delivers the excellent ionic conductivity value of 1.2×10 −4 S cm −1 at 30 °C. When the hybrid membrane without salt is plasticized with various electrolyte solvents, the ionic conductivity enhances significantly to values in the range of 1.2 to 1.8×10 −3 S cm −1 at 30 °C. The lithium metal battery (LMB) assembled with the gel polymer electrolyte (GPE), lithium anode and LiFePO4 cathode provides excellent rate and cycle performances. The LMB delivers very stable discharge capacity of 121.1 mAh g −1 after 150 cycles at the rate of 0.1 C with 97.6 % capacity holding compared to first cycle and exhibits above 99 % Coulombic efficiency values. The present crosslinked hybrid polymer electrolytes are potentially promising for the future development of high performance lithium‐metal batteries. Abstract : Hybrid polymer electrolyte membrane : A new highly conductive crosslinked organic‐inorganic hybrid electrolyte is synthesized by reaction of polyetherdiamine with methylene diphenyl diisocyanate, followed by reaction with GLYMO and MPEOPS, and LiClO4 salt. The lithium‐metal battery assembled with the hybrid polymer electrolyte membrane delivers excellent stable discharge capacity of 121.1 mAh g −1 with 97.6 % capacity holding after 150 cycles.