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

Young Soo Kim; Tae Hee Kim; Hochun Lee; Hyun Kon Song

doi:10.1039/c1ee01272j

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

Young Soo Kim, Tae Hee Kim, Hochun Lee, Hyun Kon Song

Department of Energy and Science and Engineering

Ulsan National Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

158 Scopus citations

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.

Original language	English
Pages (from-to)	4038-4045
Number of pages	8
Journal	Energy and Environmental Science
Volume	4
Issue number	10
DOIs	https://doi.org/10.1039/c1ee01272j
State	Published - Oct 2011

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

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.",

author = "Kim, {Young Soo} and Kim, {Tae Hee} and Hochun Lee and Song, {Hyun Kon}",

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doi = "10.1039/c1ee01272j",

language = "English",

volume = "4",

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journal = "Energy and Environmental Science",

issn = "1754-5692",

publisher = "Royal Society of Chemistry",

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T1 - Electronegativity-induced enhancement of thermal stability by succinonitrile as an additive for Li ion batteries

AU - Kim, Young Soo

AU - Kim, Tae Hee

AU - Lee, Hochun

AU - Song, Hyun Kon

PY - 2011/10

Y1 - 2011/10

N2 - 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.

AB - 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.

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DO - 10.1039/c1ee01272j

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JO - Energy and Environmental Science

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

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