Kabushiki Kaisha Toyota Jidoshokki

Kabushiki Kaisha Toyoda Jidoshokki Seisakusho

Hiroshi Hirate

Masakazu Murase

Yusuke Sugiyama

Masataka Nakanishi

Yoshihiro Nakagaki

Tomohiro Niimi

Shigenori Koishi

Takashi Mori

Nobuhiro Goda

Takeshi Kondo

Mutsumi Takahashi

Tomohiro Iwai

Kohta Ohtoshi

A negative-electrode active material is used for a negative electrode, the negative-electrode active material including: agglomerated particles including nanometer-size silicon produced by heat treating a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH); and a carbon layer including amorphous carbon, and covering at least some of the agglomerated particles to be composited therewith. An electric storage apparatus including the same is not only able to reduce the irreversible capacity, but also able to inhibit the generation of 'SEI.'

Negative-electrode active material, production process for the same and electric storage apparatus

A negative-electrode active material is provided, the negative-electrode active material including: a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH), as a basic skeleton; and the negative-electrode active material containing copper in an amount of from 0.01 to 50% by mass. To contain copper results in upgrading electron conductivity. Consequently, an electric storage apparatus using the negative-electrode active material for one of the negative electrodes has upgraded rate characteristic, and also has augmented charged and discharged capacities.

Negative-electrode active material and electric storage apparatus

A nanometer-size silicon material produced by heat treating a lamellar polysilane exhibits Raman-shift peaks existing at 341&#xb1;10 cm, 360&#xb1;10 cm, 498&#xb1;10 cm, 638&#xb1;10 cm, and 734&#xb1;10 cmin a Raman spectrum, has a large specific surface area, and has a reduced SiO content.

Production process for nanometer-size silicon material

Method of and apparatus for controlling engine speed of a vehicle engine

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Kariya, Japan

Hiroshi Hirate