Dispersant for power storage device positive electrode
AssigneeKao Corporation
InventorsAkito Itoi, Yutaro Kinoshita, Kyoichi Shirota
Life of this patent
Estimating the term…
Abstract
An aspect of the present disclosure relates to a dispersant for a positive electrode of a power storage device, the dispersant being a copolymer containing a constitutional unit represented by the following formula (1), a constitutional unit represented by the following formula (2), and a constitutional unit represented by the following formula (3). Also, an aspect of the present disclosure relates to a dispersant composition, a conductive material slurry for a battery and a method for producing the conductive material slurry a positive electrode paste for a battery or a positive electrode for a battery, each of which contains the dispersant for a positive electrode of a power storage device.
Claims11
A dispersant for a positive electrode of a power storage device, the dispersant being a copolymer comprising:
- a constitutional unit represented by the following formula (1);
- a constitutional unit comprising at least one monomer selected from the group consisting of 4-vinylpyridine and 2-vinylpyridine;
- and
- a constitutional unit represented by the following formula (3), wherein
- in the formula (1), R1, R2, and R3 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, and R4 represents a hydrocarbon group having 8 to 30 carbon atoms, and
- in the formula (3), R8, R9, and R10 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, and
- wherein:
- a content of the constitutional unit represented by formula (1) in all the constitutional units of the dispersant for a positive electrode of a power storage device is 39% by mass or more and 50% by mass or less;
- a content of the constitutional unit comprising at least one monomer selected from the group consisting of 4-vinylpyridine and 2-vinylpyridine in all the constitutional units of the dispersant for a positive electrode of a power storage device is 24% by mass or more and 38% by mass or less;
- and
- a content of the constitutional unit represented by formula (3) in all the constitutional units of the dispersant for a positive electrode of a power storage device is 20% by mass or more and 35% by mass or less.
A dispersant for a positive electrode of a power storage device, the dispersant being a copolymer comprising:
- a constitutional unit represented by the following formula (1);
- and
- a constitutional unit represented by the following formula (2);
- and
- a constitutional unit represented by the following formula (3), wherein
- in the formula (1), R1, R2, and R3 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, and R4 represents a hydrocarbon group having 8 to 30 carbon atoms,
- in the formula (2), R5, R6, and R7 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, and a functional group X1 is a pyridinyl group or a pyrrolidone group, and
- in the formula (3), R8, R9, and R10 are the same or different and represent a hydrogen atom, a methyl group, or an ethyl group, and
- wherein:
- a content of the constitutional unit represented by formula (1) in all the constitutional units of the dispersant for a positive electrode of a power storage device is 39% by mass or more and 50% by mass or less;
- a content of the constitutional unit represented by formula (2) in all the constitutional units of the dispersant for a positive electrode of a power storage device is 24% by mass or more and 38% by mass or less;
- and
- a content of the constitutional unit represented by formula (3) in all the constitutional units of the dispersant for a positive electrode of a power storage device is 20% by mass or more and 35% by mass or less.
Dependencies are inferred from the claim text.