Dai-ichi Kogyo Seiyaku Co., Ltd.

Other

Yuji Hoshihara

Tetsuya Higashizaki

Yasuteru Saito

Ayano Sofue

Yoshiki Ito

Masaaki Matsumoto

Yosuke Goi

Eriko Ishiko

Toshinori Sugimoto

A composition that includes a dispersion stabilizer for an electrode coating liquid for a power storage device is provided. The composition has superior ability to stably disperse an electrode active material and a conductive material, and makes it possible to manufacture a uniform electrode, even when a dispersion device that has weak shear force is used. A dispersant for an electrode coating liquid for a power storage device, the dispersant being characterized by containing cellulose fibers that satisfy (a)-(c). (a) The number average width of the short widths is 2-200 nm. (b) The aspect ratio is 7.5-250. (c) Cellulose I crystals are included and the crystallinity thereof is 70%-95%.

Dispersant for electrode coating liquid, electrode coating liquid composition including the dispersant for electrode coating liquid, electrode for power storage device manufactured using the electrode coating liquid composition, and power storage device having the electrode

An electrode coating liquid composition that contains an electrode active material, a conductive auxiliary, a dispersant, and a binding agent. The dispersant contains cellulose fibers that satisfy (a)-(c). A total amount of the dispersant and the binding agent is 0.5 mass % or more and 15 mass % or less with respect to 100 mass % of the solid content of the electrode coating liquid composition. (a) the number average width of the shortest widths is 2 nm or more and 200 nm or less. (b) the aspect ratio is 7.5 or more and 75 or less. (c) cellulose I crystals are included and the crystallinity thereof is 70% or more and 95% or less.

Electrode coating liquid composition, electrode for power storage device manufactured using the electrode coating liquid composition, and power storage device having the electrode

A lithium ion secondary battery capable of charging in 15 minutes or less has a cathode with a composite layer on a surface of a collector having an active material and a conducting agent, an anode with an active material, an insulator between the cathode and anode, and an electrolyte with lithium ions. The cathode active material is represented by LiMPO, where M is a metal atom and 0&#x3c;x&#x3c;2 and the conducting agent contains particles between 3 &#x3bc;m and 12 &#x3bc;m in size and in an amount of 1% or more by weight.

Lithium secondary battery

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Kyoto, Japan

Yuji Hoshihara