Non-aqueous electrolyte secondary battery and method of producing the same
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsRyo Hanazaki, Akihiro Ochiai, Yusuke Fukumoto, Harunari Shimamura
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Abstract
A non-aqueous electrolyte secondary battery includes at least an electrode composite material layer, an intermediate layer, and an electrode current collector. Intermediate layer is interposed between electrode composite material layer and electrode current collector. Intermediate layer contains at least insulating particles and conductive particles. Each insulating particle has an arc shape in a cross section of intermediate layer along a thickness direction. More conductive particles are present on an outer-circumference side of each arc shape than on an inner-circumference side of the arc shape.
Claims7
A method of producing a non-aqueous electrolyte secondary battery, the method comprising at least:
- forming an intermediate layer on a surface of an electrode current collector;
- forming an electrode composite material layer on a surface of the intermediate layer;
- and
- compressing the intermediate layer,
- the intermediate layer being formed so as to contain at least hollow ceramic particles and conductive particles, the conductive particles being at least one of:
- acetylene black particles,
- graphite particles,
- graphene particles,
- vapor grown carbon fiber, or
- carbon nanotubes,
- compression of the intermediate layer causing breakage of the hollow ceramic particles to form ceramic particles having an arc shape,
- within a cross section of the intermediate layer along a thickness direction, each ceramic particle has an arc shape.
Dependencies are inferred from the claim text.