Toyota Jidosha Kabushiki Kaisha

Kureha Corporation

Ryosuke Furuya

Naoki Osada

Yoshiyuki Nagasawa

Shohei Kawashima

Mitsuyasu Sakuma

A binder composition includes a dispersion medium and a group of binder particles. The group of binder particles is dispersed in the dispersion medium. The group of binder particles include a polymer material. The polymer material includes a constitutional unit originated from vinylidene difluoride. The group of binder particles has a number-based particle size distribution. The particle size distribution satisfies the following conditions: '0.19≤X≤0.26', “0.69≤Y≤0.76”, and “0≤Z≤0.05”. Here, “X” represents a frequency of particles each having a particle size of less than or equal to 40 μm. “Y” indicates a frequency of particles each having a particle size of more than 40 μm and less than or equal to 110 μm. “Z” indicates a frequency of particles each having a particle size of more than 110 μm and less than or equal to 250 μm.

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Toyota, Japan

Ryosuke Furuya