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Nanofiber Single‐Ion Conducting Electrolytes: An Approach for High‐Performance Lithium Batteries at Ambient Temperature
Author(s) -
Rohan Rupesh,
Kuo TsungChieh,
Chen MengWei,
Lee JyhTsung
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700389
Subject(s) - electrolyte , separator (oil production) , materials science , electrochemistry , electrospinning , battery (electricity) , nanofiber , chemical engineering , membrane , faraday efficiency , ionic conductivity , polyacrylonitrile , conductivity , lithium ion battery , ion , lithium (medication) , nanotechnology , composite material , electrode , chemistry , organic chemistry , polymer , medicine , power (physics) , physics , biochemistry , quantum mechanics , endocrinology , engineering , thermodynamics
Exploring the benefits of a nanofibrous morphology in electrolyte materials for Li‐battery applications, an approach of fabricating single‐ion conducting electrolyte (SICE) membranes is reported. A nonwoven nanofabric SICE membrane, delivering an outstanding performance, surpassing the conventional liquid electrolyte system at ambient conditions, was fabricated by using an electrospinning technique. When soaked in a carbonate solvent system, the membrane shows high ionic conductivity, electrochemical stability above 5.2 V (vs. Li/Li + ) and a lithium transference number ( tL i + ) close to unity (0.93). Moreover, a LiFePO 4 |Li cell assembled with this membrane performs charge/discharge up to the 5 C rate under ambient conditions with a coulombic efficiency close to 100%. The discharge capacities of this battery are found to be higher than those of a battery assembled with a commercial separator/dual‐ion salt electrolyte system up to 2 C, which offers significant progress for SICEs. Unlike most of the earlier reported SICEs that performed like a bulk‐material entity, the innovative approach might be valuable for future developments.