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US 11,539,048 B2Granted
Negative electrode, battery, and method of producing negative electrode
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYutaka Oyama, Naoto Onodera
Life of this patent
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Abstract
A negative electrode includes at least a negative electrode composite material layer. The negative electrode composite material layer contains at least composite particles and a binder. Each composite particle includes a negative electrode active material particle and a film. The film covers at least part of a surface of the negative electrode active material particle. The film contains a layered silicate mineral. The binder includes nanofibers.
Claims6
A negative electrode comprising at least:
- a negative electrode composite material layer,
- the negative electrode composite material layer containing at least composite particles and a binder,
- each composite particle including a negative electrode active material particle and a film,
- the film covering at least part of a surface of the negative electrode active material particle,
- the film containing a layered silicate mineral containing an aluminosilicate,
- the binder including oxidized cellulose nanofibers,
- the layered silicate mineral is contained in an amount not lower than 0.5 parts by mass and not higher than 1.5 parts by mass relative to 100 parts by mass of the negative electrode active material particles, and
- the binder is contained in an amount not lower than 1 part by mass and not higher than 2.5 parts by mass relative to 100 parts by mass of the negative electrode active material particles,
- the oxidized cellulose nanofibers comprises cellulose molecular chains having carboxy groups, and
- the carboxy groups form a composite with the layered silicate mineral.
7 more elements
A method of producing a negative electrode, comprising at least:
- preparing a composite particle by forming a film that covers at least part of a surface of a negative electrode active material particle;
- and
- producing a negative electrode by forming a negative electrode composite material layer that contains at least a plurality of the composite particle and a binder,
- the film containing a layered silicate mineral containing an aluminosilicate,
- the binder including oxidized cellulose nanofibers,
- the layered silicate mineral is contained in an amount not lower than 0.5 parts by mass and not higher than 1.5 parts by mass relative to 100 parts by mass of the negative electrode active material particles, and
- the binder is contained in an amount not lower than 1 part by mass and not higher than 2.5 parts by mass relative to 100 parts by mass of the negative electrode active material particles,
- the oxidized cellulose nanofibers comprises cellulose molecular chains having carboxy groups, and
- the carboxy groups form a composite with the layered silicate mineral.
6 more elements
Dependencies are inferred from the claim text.