Binder for positive electrodes, positive electrode mixture, positive electrode, and nonaqueous electrolyte secondary battery
AssigneeKureha Corporation
InventorsTakuya IKEDA, Kayoko OKADA, Yasufumi IKEYAMA
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Abstract
An object is to provide a binder for a positive electrode, which is a binder even in a small amount exhibiting high adhesion to an active material and a current collector. The binder for a positive electrode of a non-aqueous electrolyte secondary battery to achieve the object contains: a vinylidene fluoride polymer; and an epoxy compound having two or more epoxy groups, and the epoxy compound has an epoxy equivalent of 500 g/eq or less, and a total amount of the vinylidene fluoride polymer relative to a total number of moles of the epoxy groups in the binder for a positive electrode is 600 g/eq or more and 3000 g/eq or less.
Claims16
A binder for a positive electrode, the binder to be used for a positive electrode of a non-aqueous electrolyte secondary battery and comprising:
- a vinylidene fluoride polymer;
- and
- an epoxy compound comprising two or more epoxy groups,
- the epoxy compound having an epoxy equivalent of 500 g/eq or less, and
- a total amount of the vinylidene fluoride polymer relative to a total number of moles of the epoxy groups in the binder for a positive electrode being 600 g/eq or more and 3000 g/eq or less.
Dependencies are inferred from the claim text.