Binder composition for secondary battery
AssigneeNEC Corporation
InventorShin SERIZAWA
Life of this patent
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Abstract
A purpose of the present invention is to provide a binder composition for a secondary battery which can impart excellent battery characteristics, even when the heat treatment temperature is low. The binder composition for a secondary battery according to the present invention is characterized by comprising a polyamic acid comprising a repeating unit represented by chemical formula (1) and an aromatic compound comprising an electron donating group and an organic acid group, wherein A is a tetravalent group obtained by removing acid anhydride groups from a tetracarboxylic dianhydride, B is a divalent group obtained by removing amino groups from a diamine, and at least one of A and B is an aliphatic group.
Claims10
A binder composition for a secondary battery comprising a polyamic acid comprising a repeating unit represented by chemical formula (1) and an aromatic compound comprising an electron donating group and an organic acid group,
- wherein A is a tetravalent group obtained by removing acid anhydride groups from a tetracarboxylic dianhydride, B is a divalent group obtained by removing amino groups from a diamine, and at least one of A and B is an aliphatic group.
A secondary battery comprising a negative electrode comprising a polyimide comprising a repeating unit represented by chemical formula (6) and an aromatic compound comprising an electron donating group and an organic acid group,
- wherein A is a tetravalent group obtained by removing acid anhydride groups from a tetracarboxylic dianhydride, B is a divalent group obtained by removing amino groups from a diamine, and at least one of A and B is an aliphatic group.
(canceled)
A method for manufacturing an electrode, comprising the steps of:
- mixing a binder composition for a secondary battery comprising a polyamic acid comprising a repeating unit represented by chemical formula (1), an aromatic compound comprising an electron donating group and an organic acid group, a silicon material and a solvent to prepare an electrode mixture paste for a secondary battery,
- applying the electrode mixture paste for a secondary battery to a current collector, and
- treating the current collector at a temperature of 150° C. or less to react the polyamic acid to a polyimide,
- wherein A is a tetravalent group obtained by removing acid anhydride groups from a tetracarboxylic dianhydride, B is a divalent group obtained by removing amino groups from a diamine, and at least one of A and B is an aliphatic group.
Dependencies are inferred from the claim text.