Lithium secondary battery with a laminate housing material
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United States of America Patent
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N/A
Issued Date -
Aug 28, 2008
app pub date -
Feb 19, 2008
filing date -
Feb 21, 2007
priority date (Note) -
Abandoned
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Abstract
[Purpose] To provide a lithium secondary battery with excellent productivity, wherein deterioration of the housing material due to penetration of moisture into the inside of the battery and hydrogen fluoride generating inside the battery are prevented. [Solution] A lithium secondary battery wherein a power generating element comprising a positive electrode material layer, a negative electrode material layer and a layer having a lithium salt electrolyte is sealed in a housing composed of a laminate housing material comprising a metallic layer and a synthetic resin layer, characterized in that an absorption sheet is sealed along with the power generating element in the housing, wherein the absorption sheet comprises an absorption layer composed of at least one resin layer containing inorganic particles having an acid absorption function and inorganic particles having a water absorption function, said absorption layer containing at least 5 parts by weight of a total of the inorganic particles having acid absorption function and the inorganic particles having water absorption function relative to 100 parts by weight of the resin.
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