Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Kazuki Ise

Norio Takami

Yasuhiro Harada

Yorikazu Yoshida

Hiroki Inagaki

Katsuyuki Naito

Kazuomi Yoshima

Shinsuke Matsuno

Keigo Hoshina

Yoshihiro Akasaka

Yasunobu Yamashita

Takashi Kishi

Norihiro Yoshinaga

Takuya Iwasaki

Yoshiyuki Isozaki

Wen Zhang

Mitsuru Ishibashi

Taro Fukaya

Yusuke Namiki

Hirofumi Yasumiishi

Fumihiro Tejima

Yoshiaki Murata

According to one embodiment, provided is an active material including a crystal particle that includes a niobium-titanium composite oxide. A ratio A/Aof a Nb abundance Ato a Ti abundance Ain the crystal particle satisfies 2.3≤A/A≤4.0. According to a powder X-ray diffraction spectrum using a Cu-Kα ray for the crystal particle, an intensity ratio I/Iof a peak intensity Iof a peak β appearing at 12.5°≤2θ≤13.0° to a peak intensity Iof a peak α appearing at 8.5°≤2θ≤9.0° is within a range of 0.1<I/I≤2.0.

Active material, electrode, secondary battery, battery pack, and vehicle

According to one embodiment, provided is an active material including a composite oxide having a tetragonal crystal structure. The composite oxide is represented by general formula LiTiNbMO. Here, M is one selected from the group consisting of W and Mo, 0≤a≤b+4+3c, 0<b<2−2d, and 0<c<2−4d.

According to one embodiment, provided is a lithium zinc secondary battery including a positive electrode, a negative electrode, an aqueous electrolyte, and a separator between the positive electrode and the negative electrode. The negative electrode includes a zinc-including metal body and an oxide on at least a part of a surface of the metal body. The aqueous electrolyte includes zinc and a lithium salt. Zinc is dissolved and deposited at the negative electrode. Lithium is inserted and extracted from the oxide in a range of &#x2212;1.4 V (vs. SCE) or more and &#x2212;1.0 V (vs. SCE) or less. A specific surface area of the oxide is 10 m/g or more and 350 m/g or less. A mol concentration ratio Zn/Li between zinc and lithium in the aqueous electrolyte is 1.0&#xd7;10or more and 0.3 or less.

Lithium zinc secondary battery, battery pack, vehicle, and stationary power supply

According to one embodiment, a secondary battery is provided. The secondary battery includes a negative electrode. The negative electrode includes an active material composite. The active material composite includes active material particles and a layer covering at least a portion of surfaces of the active material particles. The active material particles include titanium-containing oxide particles. The layer contains N and Si. The layer includes a first surface facing the at least the portion of surfaces of the active material particles and a second surface defining a layer thickness from the first surface. An N concentration in the layer decreases from the first surface to the second surface. A Si concentration in the layer increases from the first surface to the second surface.

Secondary battery, battery pack, and vehicle

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer which contains an active material. The active material includes a plurality of primary particles containing a niobium-titanium composite oxide. The average crystallite diameter of the plurality of primary particles is 90 nm or more. The average particle size (D50) of the plurality of primary particles is in a range of 0.1 &#x3bc;m to 5 &#x3bc;m. The average value (FU) of the roughness shape coefficient (FU) according to Formula (1) below is less than 0.70 in 100 primary particles among the plurality of primary particles. 

Electrode, secondary battery, battery pack, and vehicle

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer which contains an active material. The active material includes a plurality of primary particles containing a niobium-titanium composite oxide. The average value (FU) of the roughness shape coefficient (FU) according to Formula (1) below is 0.70 or more in 100 primary particles among the plurality of primary particles. 

According to one embodiment, an active material is provided. The active material includes a lithium niobium composite oxide represented by a general formula LiFeM1NbM2O(1) and having an orthorhombic crystal structure. In the general formula (1), 0&#x2264;x&#x2264;23, 0&#x2264;y&#x2264;1 and 0&#x3c;z&#x2264;6 are satisfied. Each of M1 and M2 independently includes at least one element selected from a group consisting of Fe, Mg, Al, Cu, Mn, Co, Ni, Zn, Sn, Ti, Ta, V, and Mo.

According to one embodiment, an electrode including active material particles is provided. The active material particles contain monoclinic niobium-titanium composite oxide particles and an amorphous carbon body. The amorphous carbon body covers at least a part of surfaces of the monoclinic niobium-titanium composite oxide particles. A ratio S2/S1 of a carbon atom concentration S2 to a niobium atom concentration S1 at a surface of the electrode, according to X-ray photoelectron spectroscopy, is from 5 to 100.

A production method of a battery active material of the present embodiment includes a step of obtaining a coprecipitated product containing Ti and Nb by mixing a solution with a pH of 5 or lower, in which a Ti compound is dissolved, and a solution with a pH of 5 or lower, in which a Nb compound is dissolved, such that molar ratio of Ti and Nb (Nb/Ti) is adjusted within a range of 1&#x2264;Nb/Ti&#x2264;28, and then further mixing with an alkali solution with a pH of 8 or higher; and a step of burning the coprecipitated product under condition of 635&#xb0; C. or higher and 1200&#xb0; C. or lower.

Production method of battery active material, battery active material, nonaqueous electrolyte battery and battery pack

According to one embodiment, an active material is provided. The active material includes particles. The particles have a crystal structure belonging to a monoclinic niobium-titanium composite oxide. A ratio of a crystallite size Dc corresponding to a (020) plane with respect to an average primary particle size Dp of the particles is not less than 35%.

Active material, active material composite material, electrode, secondary battery, battery pack, and vehicle

According to one embodiment, a negative electrode active material includes particles and a carbon material. The particles is represented by LiATiBO, where A is at least one element selected from the group consisting of Na, K, Mg, Ca, Ba, and Sr; B is a metal element other than Ti; and a, b, c, and d respectively satisfy 0&#x2264;a&#x2264;5, 0&#x2264;b&#x2264;6, 0&#x2264;c&#x2264;0.6, and 0&#x2264;d&#x2264;3. The carbon material covers at least a part of surfaces of the particles.

Negative electrode active material, nonaqueous electrolyte battery, battery pack and vehicle

In general, according to one embodiment, there is provided an active material. The active material contains a composite oxide having an orthorhombic crystal structure. The composite oxide is represented by a general formula of LiNaM1TiM2O. In the general formula, the M1 is at least one selected from the group consisting of Cs and K; the M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn, and Al; and w is within a range of 0&#x2264;w&#x2264;4, x is within a range of 0&#x3c;x&#x3c;2, y is within a range of 0&#x2264;y&#x3c;2, z is within a range of 0&#x3c;z&#x2264;6, and &#x3b4; is within a range of &#x2212;0.5&#x2264;&#x3b4;&#x2264;0.5.

Active material, nonaqueous electrolyte battery, battery pack and battery module

According to one embodiment, there is provided a battery module. The battery module includes five nonaqueous electrolyte batteries electrically connected in series. The five nonaqueous electrolyte batteries each include a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode includes an active material including a titanium-including composite oxide. The titanium-including composite oxide includes Na and a metal element M within a crystal structure. The metal element M is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn, and Al.

Battery module and battery pack

In general, according to one embodiment, there is provided an active material. The active material contains a composite oxide having an orthorhombic crystal structure. The composite oxide is represented by a general formula of LiM1M2TiM3O. In the general formula, M1 is at least one selected from the group consisting of Sr, Ba, Ca, and Mg; M2 is at least one selected from the group consisting of Cs, K, and Na; M3 is at least one selected from the group consisting of Al, Fe, Zr, Sn, V, Nb, Ta, and Mo; and x is within a range of 2&#x2264;x&#x2264;6, y is within a range of 0&#x3c;y&#x3c;1, z is within a range of 0&#x3c;z&#x2264;6, and &#x3b4; is within a range of &#x2212;0.5&#x2264;&#x3b4;&#x2264;0.5.

According to one embodiment, there is provided an active material including particles of a composite oxide having an orthorhombic crystal structure and represented by the general formula LiNaM1TiM2O. The particles of the composite oxide have an average crystallite size of 50 nm to 90 nm and an average primary particle size of 0.1 &#x3bc;m to 0.6 &#x3bc;m. M1 is at least one selected from the group consisting of Cs and K. M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Y, Co, Mn, and Al. w falls within 0&#x2264;w&#x2264;4, x falls within 0&#x3c;x&#x3c;2, y falls within 0&#x2264;y&#x3c;2, z falls within 0&#x3c;z&#x3c;6, and &#x3b4; falls within &#x2212;0.5&#x2264;&#x3b4;&#x2264;0.5.

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Kawasaki, Japan

Kazuki Ise