A physical organogel electrolyte: Characterized by in situ thermo-irreversible gelation and single-ion-predominent conduction
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- A physical organogel electrolyte: Characterized by in situ thermo-irreversible gelation and single-ion-predominent conduction
- Kim, Young-Soo; Cho, Yoon-Gyo; Odkhuu, Dorj; Park, Noejung; Song, Hyun-Kon
- TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; POLYMER ELECTROLYTES; GEL ELECTROLYTES; LITHIUM; BATTERIES; KINETICS; LIQUID; NUMBER
- Issue Date
- NATURE PUBLISHING GROUP
- SCIENTIFIC REPORTS, v.3, no., pp.1 - 6
- Electrolytes are characterized by their ionic conductivity (σi). It is desirable that overall σi results from the dominant contribution of the ions of interest (e.g. Li+ in lithium ion batteries or LIB). However, high values of cationic transference number (t+) achieved by solid or gel electrolytes have resulted in low σi leading to inferior cell performances. Here we present an organogel polymer electrolyte characterized by a high liquid-electrolyte- level σi (∼101 mS cm-1) with high t+ of Li+ (>0.8) for LIB. A conventional liquid electrolyte in presence of a cyano resin was physically and irreversibly gelated at 60 °C without any initiators and crosslinkers, showing the behavior of lower critical solution temperature. During gelation, σi of the electrolyte followed a typical Arrhenius-type temperature dependency, even if its viscosity increased dramatically with temperature. Based on the Li + -driven ion conduction, LIB using the organogel electrolyte delivered significantly enhanced cyclability and thermal stability.
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