Facile reduction of pseudo-carbonates: promoting solid electrolyte interphases with dicyanoketene alkylene acetals in lithium-ion batteries

Coralie Forestier , Piotr Jankowski , Laura Coser , Gregory Gachot , Lucas Sannier , Patrik Johansson , Michel Armand , Sylvie Grugeon , Stephane Laruelle

Abstract

Dicyanoketene ethylene and propylene acetals, DCKEA and DCKPA respectively, have been investigated as electrolyte additives for Li-ion batteries. The purpose was to assess the changes in reduction behaviour and solid electrolyte interphase (SEI) passivation properties upon replacing the carbonyl group of ethylene carbonate (EC) and propylene carbonate (PC) solvents, respectively, by the slightly more electronegative and highly conjugated double bond; length as m-dashC(CN)2 group. The experimental reduction potentials and the IR spectroscopy characterisation efforts were further supported by density functional theory (DFT) computations. The two additives were found to, in relatively small amount (0.5 wt%), provide beneficial effects on the capacity retention of 8 mAh cells cycled at 20 and 45 °C. Moreover, the additives proved to enhance the thermal stability of the lithiated graphite/electrolyte interface, as deduced from DSC measurements.
Author Coralie Forestier - [Université de Picardie Jules Verne]
Coralie Forestier,,
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, Piotr Jankowski (FC / CICSST)
Piotr Jankowski,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Laura Coser - [Université de Picardie Jules Verne]
Laura Coser,,
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, Gregory Gachot - [Université de Picardie Jules Verne]
Gregory Gachot,,
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, Lucas Sannier - [Renault]
Lucas Sannier,,
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, Patrik Johansson - [Université de Picardie Jules Verne]
Patrik Johansson,,
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, Michel Armand - [Université de Picardie Jules Verne]
Michel Armand,,
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, Sylvie Grugeon - [Université de Picardie Jules Verne]
Sylvie Grugeon,,
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, Stephane Laruelle - [Université de Picardie Jules Verne]
Stephane Laruelle,,
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Journal seriesJournal of Power Sources, ISSN 0378-7753
Issue year2016
Vol303
Pages1-9
Publication size in sheets0.5
Keywords in EnglishLi-ion battery; SEI; Additives; Thermal runaway; DFT; Dicyanoketene alkylene acetal
ASJC Classification2208 Electrical and Electronic Engineering; 1606 Physical and Theoretical Chemistry; 2102 Energy Engineering and Power Technology; 2105 Renewable Energy, Sustainability and the Environment
DOIDOI:10.1016/j.jpowsour.2015.10.103
URL http://www.sciencedirect.com/science/article/pii/S0378775315304900
Languageen angielski
File
1-s2.0-S0378775315304900-main.pdf 1.71 MB
Score (nominal)45
Score sourcejournalList
ScoreMinisterial score = 40.0, 30-01-2020, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 30-01-2020, ArticleFromJournal
Publication indicators Scopus Citations = 6; WoS Citations = 5; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.533; WoS Impact Factor: 2016 = 6.395 (2) - 2016=6.117 (5)
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