Ube Industries, Inc.

Ube Corporation

Hiroshi Fujino

Hirofumi Takemoto

Yoshizumi Tanaka

Yasumasa Iwamoto

Kazuhiro Miyoshi

Shin-ichi Sakata

Chisen Hashimoto

Hiroshi Oda

Shin-Ichi Sakata

Atsuyoshi Nakagawa

Yoshiki Kurihara

Koji Abe

The present invention provides a lithium titanate powder for an electrode of an energy storage device, the lithium titanate powder comprising LiTiOas a main component, having a specific surface area of 4 m/g or more, and containing at least one localized element selected from the group consisting of boron (B), Ln (where Ln is at least one metal element selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Hb, Er, Tm, Yb, Lu, Y, and Sc), and M1 (where M1 is at least one metal element selected from W and Mo), wherein boron (B), Ln, and M1 as the localized element are localized on or near surfaces of lithium titanate particles forming the lithium titanate powder.

Lithium titanate powder and active material ingredient for electrode of power storage device, and electrode sheet and power storage device using same

Provided is a lithium titanate powder for an electrode of an energy storage device, wherein the lithium titanate powder includes LiTiOas a main component and has a specific surface area of 5 to 50 m/g, a total-fine pore volume of the lithium titanate powder is 0.03 to 0.5 ml/g and the lithium titanate powder includes a phosphorus atom in an amount of 0.03 to 1% by mass, an active material containing the lithium titanate powder, an electrode sheet containing the active material, and an energy storage device using the electrode sheet.

Lithium titanate powder including phosphorous, active material, electrode sheet, and energy storage device using the same

Provided is a lithium titanate powder for an electrode of an energy storage device, an active material containing the same, and an energy storage device using the active material. The lithium titanate powder comprises LiTiOas a main component, and wherein, when a volume surface diameter calculated from specific surface area determined by the BET method is Dand a crystallite diameter calculated from half-peak width of (111) plane of LiTiOby the Scherrer equation is D, Dis 0.1 to 0.6 &#x3bc;m; Dis larger than 80 nm; D/D(&#x3bc;m/&#x3bc;m), ratio of Dto D, is 3 or less; M (wherein M is at least one type of metal element selected from a group consisting of Mg, Zn, Al, Ga, and In) is contained; and when atomic concentrations of the M and titanium at 5 nm inner positions from a surface of a lithium titanate particle are D(atm %) and Dti (atm %) respectively, and when atomic concentration of the M at 100 nm inner position from the lithium titanate particle surface is D(atm %), following formulas (I) and (II) are satisfied.1/2&#x2267;5&#x2003;&#x2003;(I)0.02&#x2266;1/&#x2266;0.4&#x2003;&#x2003;(II)

Lithium titanate powder for electrode of energy storage device, active material, and energy storage device using the same

Provided is a lithium titanate powder for an electrode of an energy storage device, the lithium titanate powder comprising LiTiOas a main component, wherein, when the volume surface diameter calculated from the specific surface area determined by the BET method is represented as Dand the crystallite diameter calculated from the half-peak width of the peak of the (111) plane of LiTiOby the Scherrer equation is represented as D, Dis 0.1 to 0.6 &#x3bc;m, Dis greater than 80 nm, and (D/D(&#x3bc;m/&#x3bc;m)) the ratio of Dto Dis 3 or less. Also provided are an active material including the lithium titanate powder and an energy storage device using the active material.

Lithium titanate powder, active material, and energy storage device using the same

An Li-containing &#x3b1;-sialon phosphor particle by mixing a silicon nitride or nitrogen-containing silicon compound powder, an AlN-containing aluminum source, an Li source and an Eu source, firing the mixture at 1,500 to 1,800&#xb0; C. in a nitrogen-containing inert gas atmosphere under atmospheric pressure to obtain a lithium-containing &#x3b1;-sialon powder working out to a starting material, adding and mixing an additional lithium source to the powder, and re-firing the obtained mixture at a temperature lower than the above firing temperature or at a temperature of 1,100&#xb0; C. to less than 1,600&#xb0; C., at 1,100&#xb0; C. to less than 1,600&#xb0; C., in a nitrogen-containing inert gas atmosphere under atmospheric pressure.

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Ube, Japan

Hiroshi Fujino