NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND ITS MANUFACTURING METHOD

Japanese Patent JP3631185

B2

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery provided with lithium manganate in a positive electrode without causing uneven thermal polymerization even if an electrolytic solution prepared by dissolving a solute in a mixed solvent containing cyclic carbonate and chain carbonate is solidified by the use of a thermally polymerizing polymer material.
SOLUTION: This nonaqueous electrolyte secondary battery is provided, in an armoring body 14, with the positive electrode 11 containing the spinel type lithium manganate, a negative electrode 12 containing a negative electrode active material capable of inserting and desorbing lithium ions, a separator 13 for separating them, and a gel electrolyte. The gel electrolyte is formed by polymerizing and gelatinizing, by the use of a thermally polymerizing monomer material, the electrolytic solution prepared by dissolving the solute comprising a lithium salt in the mixed solution containing the cyclic carbonate and chain carbonate. On at least one of the surfaces of the positive electrode 11 and the negative electrode 12, a coating of lithium carbonate produced by reaction of gaseous carbon dioxide dissolved in the electrolytic solution with the electrolytic solution is formed.

Naoki Imachi
Ikuro Nakane
Ikukawa Kun

JP2001284895A

March 23, 2005

September 19, 2001

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Sanyo Electric Co., Ltd.

H01M10/05; H01M4/13; H01M4/131; H01M4/505; H01M4/525; H01M10/052; H01M10/0565; H01M10/058; (IPC1-7): H01M10/40; H01M4/02; H01M4/58

JP10188984A

Takamori Suzuki
Yasuo Asami
Hideo Takahashi
Yoshitaka Takeyama

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