[10p-N306-1~18] 17.2 Graphene

[10p-N306-9] Improvement of load characteristics of lithium-ion secondary battery by using exfoliated graphene sheets as conductive additive

〇Norihiro Shimoi¹, Shinjiro Umeya², Yasunori Watanabe², Akira Hirakawa² (1.Tohoku Inst., 2.KAMEYAMA Iron Works)

Keywords:Li-ion secondary battery, exfoliated graphene, conductive additive

Exfoliated synthetic graphene, as conductive additive, produced using a biaxial independently controlled three-dimensional rotary ball mill has a unique shape. In order to uniformly disperse it in the electrode, we develop a dispersion technology using a wet process that utilizes a homogenizer and jet mill. Although the resistance component of the electrode synthesized by mixing exfoliated graphene with powdered silicon is greater than those of the other carbon materials, it is considered advantageous as a conductive additive because it ensures physical contact with the active material, even when the anode matrix disintegrates due to the rapid volume.