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US 12,633,544 B2Granted
Conductive material dispersion, and electrode and lithium secondary battery manufactured using the same
AssigneeLG Energy Solution, Ltd.
InventorsDong Hyun Kim, Houng Sik Yoo, Seong Kyun Kang, Gye Min Kwon, Hyeon Choi
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Abstract
A conductive material dispersion includes a carbon-based conductive material, a main dispersant, an auxiliary dispersant, and a dispersion medium, wherein the main dispersant is a nitrile-based copolymer and the auxiliary dispersant is a copolymer including an oxyalkylene unit and at least one selected from the group consisting of a styrene unit and an alkylene unit.
Claims18
An electrode comprising an electrode active material layer,
- the electrode material active layer comprising:
- a carbon-based conductive material;
- and
- a dispersant;
- wherein the dispersant includes a main dispersant and an auxiliary dispersant, wherein:
- the main dispersant is a nitrile-based copolymer;
- and
- the auxiliary dispersant is a copolymer including an oxyalkylene unit and at least one of a styrene unit or an alkylene unit.
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An electrode comprising an electrode active material layer,
- the electrode active material layer comprising:
- a carbon-based conductive material;
- and
- a dispersant;
- wherein the dispersant includes a main dispersant and an auxiliary dispersant, wherein:
- the main dispersant is a nitrile-based copolymer;
- and
- the auxiliary dispersant is a copolymer including an oxyalkylene unit and at least one of a styrene unit or an alkylene unit,
- wherein the conductive material dispersion satisfies Equation (1) below when the content of the main dispersant is W1(wt %), the content of the auxiliary dispersant is W2(wt %), the content of the carbon-based conductive material is W3(wt %), and the BET specific surface area value of the conductive material is A(m2/g) in the conductive material dispersion:
- 0.07A≤{(W1+W2)/W3}×100≤0.3A Equation (1).
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Dependencies are inferred from the claim text.