Non-aqueous electrolyte secondary battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKoji Kinoshita, Tatsuya Hashimoto
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Abstract
According to the invention, a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte is provided. The negative electrode contains a negative electrode active material, a conductive material, and a binder. When an average particle size of the conductive material is referred to as De, and an average particle size of the binder is referred to as Db, Db≤De is satisfied. In other words, the average particle size Db of the binder is equal to or smaller than the average particle size De of the conductive material.
Claims3
A non-aqueous electrolyte secondary battery comprising:
- a positive electrode;
- a negative electrode;
- and
- a non-aqueous electrolyte, wherein
- the negative electrode contains a negative electrode active material, a conductive material, and a binder,
- the binder is at least one of a polymer or a copolymer;
- 0.5≤(Db/De)≤0.9 is satisfied where an average particle size of the conductive material is De, and an average particle size of the binder is Db,
- Db is 90 nm or smaller,
- the average particle size of the conductive material is 180 nm or smaller, and
- the average particle size is a volume-based particle size measured based on a dynamic light scattering method.
Dependencies are inferred from the claim text.