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Electronegativity-induced enhancement of thermal stability by succinonitrile as an additive for Li ion batteries

Title
Electronegativity-induced enhancement of thermal stability by succinonitrile as an additive for Li ion batteries
Authors
Kim, YS[Kim, Young-Soo]Kim, TH[Kim, Tae-Hee]Lee, H[Lee, Hochun]Song, HK[Song, Hyun-Kon]
DGIST Authors
Lee, H[Lee, Hochun]
Issue Date
2011-10
Citation
Energy and Environmental Science, 4(10), 4038-4045
Type
Article
Article Type
Article
Keywords
Atomic SpectroscopyCarbonateCathodesCationChemical BondsCobalt CompoundsComplex FormationsCyanidesCyclabilityElectrochemical MethodElectrochemistryElectrodeElectrokinesisElectrolyteElectrolytesElectronElectronegativityEthyleneEthylene CarbonateExothermal HeatExothermic HeatGas EvolutionGraphiteGraphite AnodeHigh TemperatureLi-Ion BatteriesLithiumLithium-Ion BatteryLithium CompoundsMetal AtomsNitrogen CompoundOnset TemperatureSpectroscopic AnalysisSpectroscopic StudiesSuccinonitrileThermodynamic StabilityX-Ray
ISSN
1754-5692
Abstract
Succinonitrile (SN, CN-[CH 2] 2-CN) is evaluated as an additive for improving thermal stability in ethylene carbonate (EC)-based electrolytes for lithium ion batteries. Without any sacrifice of performance such as cyclability and capacity, the introduction of SN into an electrolyte with a graphite anode and Li xCoO 2 cathode leads to (1) reducing the amount of gas emitted at high temperature, (2) increasing the onset temperature of exothermic reactions and (3) decreasing the amount of exothermal heat. The improvement in the thermal stability is considered to be due to strong complex formation between the surface metal atoms of Li xCoO 2 and nitrile (-CN) groups of SN, from spectroscopic studies based on photoelectrons induced by X-rays and by considering that the exothermic heat and gas evolution are caused by interfacial reactions between the electrolyte and cathode. © 2011 The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/1154
DOI
10.1039/c1ee01272j
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Lee, Ho Chun 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
Files:
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Collection:
ETCETC
Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles


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