DISPERSANT FOR ELECTRODE COATING LIQUID, ELECTRODE COATING LIQUID COMPOSITION CONTAINING THE DISPERSANT FOR ELECTRODE COATING LIQUID, POWER STORAGE DEVICE ELECTRODE MANUFACTURED BY USE OF THE ELECTRODE COATING LIQUID COMPOSITION, AND POWER STORAGE DEVICE INCLUDING THE ELECTRODE

摘要

To provide a composition containing dispersion stabilizer for an electrode coating liquid of a power storage device, which is superior in dispersion stability of an electrode active material and a conductive material, and which enables the uniform electrode manufacturing even in the case of using a disperser of a weak shear force.SOLUTION: A dispersant for an electrode coating liquid of a power storage device comprises cellulose fibers which satisfy the following requirements (a) to (c). (a) The number-average width is 2-200 nm in a short width. (b) The aspect ratio is 7.5 or more and 250 or less. (c) The cellulose fibers have a cellulose I type crystal of which the degree of crystallization is 70% or more and 95% or less, and they further satisfy the requirements (d) and (e). In the electrode coating liquid dispersant, (d) the cellulose fibers have an anion functional group; and (e) the anionic functional group is a carboxyl group, and its content is 1.2-2.5 mmol/g.SELECTED DRAWING: None