A comparative study is made on the surface films that are deposited on a LiCoO2 electrode by oxidative decomposition of room-temperature ionic liquids (RTILs) that have either a saturated (propyl) or an unsaturated (allyl) substituent on the pyrrolidinium cation. The surface film deposited from the former RTIL does not so perfectly cover the LiCoO2 electrode surface that the film deposition continues with cycling, leading to a gradual increase in the electrode polarization and an eventual capacity fading. From the allyl-containing RTIL, however, a uniformly covered surface film is deposited even after a single charging to give better cyclability to the LiCoO2 electrode. The latter film contains a larger amount of organic carbon species relative to that found in the former. An enhanced film property is also observed by adding vinylene carbonate that has an unsaturated moiety, ensuring that the unsaturated functional groups are responsible for such favorable film properties.
机构:
Cent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, IndiaCent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, India
Balakrishnan, PG
;
Ramesh, R
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机构:
Cent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, IndiaCent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, India
Ramesh, R
;
Kumar, TP
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机构:
Cent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, IndiaCent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, India
机构:
Cent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, IndiaCent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, India
Balakrishnan, PG
;
Ramesh, R
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h-index: 0
机构:
Cent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, IndiaCent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, India
Ramesh, R
;
Kumar, TP
论文数: 0引用数: 0
h-index: 0
机构:
Cent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, IndiaCent Electrochem Res Inst, Electrochem Power Syst Div, Karaikkudi 630006, Tamil Nadu, India