DISPERSANT COMPOSITION FOR POWER STORAGE DEVICE ELECTRODES

• Main Authors: ITOI AKITO, AKAGI RYUICHI
• Format: Patent
• Language: English; Japanese
• Published: 17.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a dispersant composition for power storage device positive electrodes of which the dissolubility of a dispersant with respect to an electrolyte is low and which is capable of preparing a conductive material slurry of low viscosity and satisfactory handleability and forming a coating of high adhesiveness to a collector.SOLUTION: A dispersant composition for power storage device positive electrodes contains a copolymer (A), an inorganic or organic alkali component (B) and an organic solvent (C). The copolymer (A) contains a meta acrylonitrile-derived unit I in 30 mass% or more and 99 mass% or less and a meta acrylamide-derived unit II in 1 mass% or more and 0 mass% or less with respect to total 100 mass% of all the units, and a mass ratio (B)/(A) of the copolymer (A) and the alkali component (B) is 0.2 or more and 2.0 or less.SELECTED DRAWING: None 【課題】一態様において、電解液に対する分散剤の溶解性が低く、低粘度でハンドリング性が良好な導電材スラリーの作製を可能とし、且つ、集電体へ密着性が高い塗膜の形成を可能とする、蓄電デバイス正極用分散剤組成物を提供する。【解決手段】本開示の蓄電デバイス正極用分散剤組成物は、共重合体（Ａ）と無機または有機アルカリ成分（Ｂ）と有機溶媒（Ｃ）とを含み、共重合体（Ａ）は、全単位の合計１００質量％に対して、（メタ）アクリロニトリルに由来する単位Iを３０質量％以上９９質量％以下、（メタ）アクリルアミドに由来する単位IIを１質量％以上０質量％以下含み、共重合体（Ａ）とアルカリ成分（Ｂ）との質量比率（Ｂ）／（Ａ）が０．２以上２．０以下である。【選択図】なし