Stability of lithium polymer battery based on substituted spinel cathode and PEG-borate ester/PC plasticized polymer electrolyte

Iresha R M Kottegoda, Zhumabay Bakenov, Hiromasa Ikuta, Masataka Wakihara

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The possible application of a novel plasticized polymer electrolyte in lithium battery based on substituted spinel cathode was investigated. The polymer electrolyte was prepared by dissolving LiClO 4 in the host polymer, poly(ethylene glycol) methacrylates (PEGMs) plasticized by both propylene carbonate (PC) and poly(ethylene glycol)-borate ester (PEG-BE) of various compositions. The ionic conductivity σ of the polymer is enhanced with the addition of PC, while the lithium ion transference number t Li+ reaches an optimum in a mixture of 49% PEG-BE and 21% of PC in the polymer weight. PEG-BE has been recognized to interact with anion as a Lewis acid, which leads to high lithium ion conductivity. The observed trend of σ and t Li+ with decreasing PEG-BE is suggested as being due to enhancement of anion conductivity in the medium as a result of low viscous and high dielectric properties of PC coupled with suppressed Lewis acid interaction of PEG-BE. The cycle performance and the storage stability of the Li/polymer electrolyte/LiMn 1.8Co 0.2O 4 cell comprising the above electrolyte were found to be quite acceptable for practical utility.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume152
Issue number8
DOIs
Publication statusPublished - 2005
Externally publishedYes

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Borates
borates
propylene
Electrolytes
Polyethylene glycols
Propylene
spinel
electric batteries
glycols
esters
Carbonates
carbonates
Esters
Polymers
Cathodes
ethylene
lithium
cathodes
electrolytes
polymers

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Stability of lithium polymer battery based on substituted spinel cathode and PEG-borate ester/PC plasticized polymer electrolyte. / Kottegoda, Iresha R M; Bakenov, Zhumabay; Ikuta, Hiromasa; Wakihara, Masataka.

In: Journal of the Electrochemical Society, Vol. 152, No. 8, 2005.

Research output: Contribution to journalArticle

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