Cited time in webofscience Cited time in scopus

Surface Complex Formation between Aliphatic Nitrile Molecules and Transition Metal Atoms for Thermally Stable Lithium-Ion Batteries

Surface Complex Formation between Aliphatic Nitrile Molecules and Transition Metal Atoms for Thermally Stable Lithium-Ion Batteries
Kim, YS[Kim, Young-Soo]Lee, H[Lee, Hochun]Song, HK[Song, Hyun-Kon]
DGIST Authors
Lee, H[Lee, Hochun]
Issued Date
Article Type
Aliphatic NitrileAliphatic NitrilesCarbonate-Based ElectrolytesCathode Active MaterialCathodesChemical BondsCobaltCobalt SurfaceCyanidesElectrolyteElectrolytesElectronegativityElevated TemperatureFunctional GroupsLithium-Ion BatteriesLithium-Ion BatteryLithium BatteriesMoleculesProtecting The SurfaceStrong InteractionThermal StabilityThermodynamic StabilityTransition-Metals Atoms
Non-flammability of electrolyte and tolerance of cells against thermal abuse should be guaranteed for widespread applications of lithium-ion batteries (LIBs). As a strategy to improve thermal stability of LIBs, here, we report on nitrile-based molecular coverage on surface of cathode active materials to block or suppress thermally accelerated side reactions between electrode and electrolyte. Two different series of aliphatic nitriles were introduced as an additive into a carbonate-based electrolyte: di-nitriles (CN-[CH 2]n-CN with n = 2, 5, and 10) and mono-nitriles (CH 3-[CH2]m-CN with m = 2, 5, and 10). On the basis of the strong interaction between the electronegativity of nitrile functional groups and the electropositivity of cobalt in LiCoO2 cathode, aliphatic mono- and di-nitrile molecules improved the thermal stability of lithium ion cells by efficiently protecting the surface of LiCoO 2. Three factors, the surface coverage θ, the steric hindrance of aliphatic moiety within nitrile molecule, and the chain polarity, mainly affect thermal tolerance as well as cell performances at elevated temperature. © 2014 American Chemical Society.
American Chemical Society
Related Researcher
  • 이호춘 Lee, Hochun 에너지공학과
  • 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
Files in This Item:

There are no files associated with this item.

Appears in Collections:
Department of Energy Science and Engineering Electrochemistry Laboratory for Sustainable Energy(ELSE) 1. Journal Articles


  • twitter
  • facebook
  • mendeley

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.