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Iodine as a Temperature-Responsive Redox Shuttle Additive for Swelling Suppression of Lithium-Ion Batteries at Elevated Temperatures

Iodine as a Temperature-Responsive Redox Shuttle Additive for Swelling Suppression of Lithium-Ion Batteries at Elevated Temperatures
Park, SH[Park, Seong-Hyo]Kim, HJ[Kim, Hyeon Jin]Jeon, J[Jeon, Joomi]Choi, Y[Choi, Yongsu]Cho, JJ[Cho, Jeong-Ju]Lee, H[Lee, Hochun]
DGIST Authors
Park, SH[Park, Seong-Hyo]; Kim, HJ[Kim, Hyeon Jin]; Lee, H[Lee, Hochun]
Issue Date
Chemelectrochem, 3(11), 1915-1921
Article Type
BatteriesBattery Management SystemsBiomechanicsCellsCharging (Batteries)CytologyDischarge CapacitiesElectric BatteriesElectrochemistryElectrolyte AdditivesElectrolytesElevated TemperatureEnvironmental CompatibilityHydrogelsIodineLithium-Ion BatteriesLithium AlloysLithium CompoundsMechanical PropertiesPreferential AdsorptionRedox ChemistryRedox Shuttle AdditivesSecondary BatteriesSolar CellsSwellingTemperature-Responsive
The swelling issue by gas evolution at elevated temperatures (85–90 °C) is one of the major challenges related to current Li-ion batteries (LIBs). We herein demonstrate that iodine (I2) as a redox shuttle additive, when its dose is properly determined, can suppress the swelling behavior of LiCoO2/graphite Al-pouch cells during storage at 90 °C without sacrificing other cell performances. This approach is based on two findings: 1) swelling during 90 °C storage is severe only when the cells are fully charged, and 2) the shuttling reaction of I2 can be tuned to be activated only when the temperature is as high as 90 °C by employing an appropriate amount of I2. Therefore, when a fully charged cell is exposed to a temperature of 90 °C, the self-discharge by I2 lowers the state of charge of the cell, suppressing the swelling. This temperature-responsive shuttling behavior of I2 is ascribed to the preferential adsorption of I2 on the cathode surface. It is also confirmed that inclusion of the I2 additive does not lead to deterioration in other aspects of cell performance, such as the discharge capacity or long-term cyclability. Along with the improved cell performance, the low-cost and environmental compatibility of I2 makes it a promising electrolyte additive for thermally robust LIBs. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Wiley-VCH Verlag
Related Researcher
  • Author Lee, Hochun Electrochemistry Laboratory for Sustainable Energy(ELSE)
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
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Department of Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles

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