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Electronegativity-induced enhancement of thermal stability by succinonitrile as an additive for Li ion batteries
- Electronegativity-induced enhancement of thermal stability by succinonitrile as an additive for Li ion batteries
- 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
- Energy and Environmental Science, 4(10), 4038-4045
- Article Type
- Atomic Spectroscopy; Carbonate; Cathodes; Cation; Chemical Bonds; Cobalt Compounds; Complex Formations; Cyanides; Cyclability; Electrochemical Method; Electrochemistry; Electrode; Electrokinesis; Electrolyte; Electrolytes; Electron; Electronegativity; Ethylene; Ethylene Carbonate; Exothermal Heat; Exothermic Heat; Gas Evolution; Graphite; Graphite Anode; High Temperature; Li-Ion Batteries; Lithium; Lithium-Ion Battery; Lithium Compounds; Metal Atoms; Nitrogen Compound; Onset Temperature; Spectroscopic Analysis; Spectroscopic Studies; Succinonitrile; Thermodynamic Stability; X-Ray
- 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.
- Royal Society of Chemistry
- Related Researcher
Lee, Ho Chun
Electrochemistry Laboratory for Sustainable Energy(ELSE)
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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Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles
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