Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Wen Zhang

Norio Takami

Yasuhiro Harada

Keigo Hoshina

Hiroki Inagaki

Kazuomi Yoshima

Tetsuya Sasakawa

Takashi Kishi

Tomoko Sugizaki

Tomoe Kusama

Yuki Otani

Kazuki Ise

Yasunobu Yamashita

Takuya Iwasaki

Yorikazu Yoshida

Yoshiyuki Isozaki

Mitsuru Ishibashi

Miho Maruyama

Yusuke Namiki

According to one embodiment, an electrode includes a current collector and an active material-containing layer. The active material-containing layer includes an active material, a conductive agent, and cellulose fiber. The conductive agent includes carbon fiber. The active material-containing layer includes a first surface brought into contact with the current collector, and a second surface. 2000/mmor less of first agglomerates are present on the second surface. Each of the first agglomerates includes at least one of the carbon fiber or the cellulose fiber, and does not include the active material. Each of the first agglomerates has a longest diameter of 5 μm or more and a shortest diameter of 1 μm or more.

Electrode, secondary battery, battery pack, and vehicle

According to one embodiment, an electrode is provided. The active material-containing layer includes an active material, inorganic solid particles having lithium ion conductivity, and carbon fiber. A pore diameter Dat the first peak is 0.05 &#x3bc;m to 10 &#x3bc;m. A value SA&#x2212;SB is 1.4 or more in a slope distribution curve of the active material-containing layer, where a vertical axis of the slope distribution curve represents a slope of a straight line passing through two adjacent measurement points on the log differential pore volume distribution curve and a horizontal axis of the slope distribution curve represents a smaller pore diameter of the two adjacent measurement points. The value SA&#x2212;SB is obtained by subtracting a minimum slope value SB from a maximum slope value SA.

An electrode for a secondary battery comprises a current collector; and an active material-containing layer has active materials which comprise titanium-containing composite oxide having an orthorhombic crystal structure and represented by a general formula LiM1TiM2O; wherein the active material-containing layer has intensity ratio Ia/Ib in an X-ray diffraction pattern of the active material-containing layer, the Ia and the Ib are obtained by powder X-ray diffraction method using Cu-K&#x3b1; ray, the intensity ratio is within a range of 0.5&#x2264;Ia/Ib&#x2264;2, the Ia is the strongest intensity of a diffraction peak among diffraction peaks appearing within a range of 42&#xb0;&#x2264;2&#x3b8;&#x2264;44&#xb0;, and the Ib is the strongest intensity of a diffraction peak among diffraction peaks appearing within a range of 44&#xb0;&#x3c;2&#x3b8;&#x2264;48&#xb0;. (M1 is at least one selected from the group consisting of Sr, Ba, Ca, Mg, Na, Cs, Rb and K, M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Y, Fe, Co, Cr, Mn, Ni and Al

Electrode for a secondary battery, secondary battery, battery pack and vehicle

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer includes: an active material including a titanium-containing composite oxide; inorganic solid particles having lithium ion conductivity; and carbon fiber. The active material-containing layer has a first peak indicating a maximum log differential pore volume in a log differential pore volume distribution curve according to mercury porosimetry. A pore diameter PD at the first peak is 0.01 &#x3bc;m to 0.1 &#x3bc;m. The first peak has a full width at half maximum of 0.05 &#x3bc;m or less.

According to one embodiment, an electrode includes a current collector and an active material-containing layer. The active material-containing layer contains a titanium-niobium composite oxide. A cross-section of the active material-containing layer includes a first cross-section from the current collector to length 0.5t with respect to a thickness t of the active material-containing layer, and a second cross-section from length 0.5t to length t from the current collector. An area ratio S1 occupied by the titanium-niobium composite oxide within the first cross-section, and an area ratio S2 occupied by the titanium-niobium composite oxide within the second cross-section satisfy 0.8&#x3c;S2/S1&#x3c;1. A maximum peak in a particle diameter frequency distribution of the titanium-niobium composite oxide is from 0.5 &#x3bc;m to 3 &#x3bc;m.

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer includes an active material and a conductive agent. The active material contains primary particles of a niobium-titanium composite oxide. The conductive agent contains fibrous carbon. The primary particles have an average particle size of 0.3 &#x3bc;m or more and 2 &#x3bc;m or less. At least a part of a surface of the primary particles is coated with the fibrous carbon. A covering ratio of the primary particles by the fibrous carbon is 0.01% or more and 40% or less.

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer containing active material particles, ferroelectric particles, and solid electrolyte particles. A ratio (FE) of the number of the ferroelectric particles in contact with the active material particles relative to the number of the ferroelectric particles included in the active material-containing layer is 85% or more. A ratio (SE) of the number of the solid electrolyte particles not in contact with the active material particles relative to the number of the solid electrolyte particles included in the active material-containing layer is 30% or more.

According to one embodiment, a nonaqueous electrolyte battery is provided. The nonaqueous electrolyte battery includes a positive electrode, a negative electrode including a negative electrode active material layer, a separator layer, an intermediate region, and a gel nonaqueous electrolyte. The separator layer and the intermediate region hold at least a part of the gel nonaqueous electrolyte. The nonaqueous electrolyte battery satisfies a volume ratio V/Vof 5 or more. Vis a volume of the intermediate region. Vis an average volume of gaps among the particles of the niobium-and-titanium-containing composite oxide in the negative electrode active material layer.

Nonaqueous electrolyte battery, battery pack and vehicle

A nonaqueous electrolyte battery electrode according to an embodiment includes a current collector and a mixed layer formed on one surface or both surfaces of the current collector. The mixed layer includes an active material and a binding agent. The ratio I/Iof the highest peak intensity Iin peaks appearing in the wavelength range of 1400 to 1480 cmto the highest peak intensity Iin peaks appearing in the wavelength range of 2200 to 2280 cmis 10 or more and 20 or less in an infrared absorption spectrum measured according to a total reflection measurement method. Alternatively, in the mixed layer, the ratio I/Iof the highest peak intensity Iin peaks appearing in the wavelength range of 1650 to 1850 cmto the highest peak intensity Iin peaks appearing in the wavelength range of 1400 to 1480 cmis 0.1 or more and 0.8 or less in an infrared absorption spectrum measured according to a total reflection measurement method.

Nonaqueous electrolyte battery electrode, nonaqueous electrolyte battery, and battery pack

According to one embodiment, there is provided an active material. The active material includes particles. Each of the particles includes a core phase and a shell phase surrounding at least a part of the core phase. The core phase includes a first monoclinic niobium-titanium composite oxide. The shell phase includes a second monoclinic niobium-titanium composite oxide. An oxidation number of titanium in the core phase is larger than an oxidation number of titanium in the shell phase, and/or an oxidation number of niobium in the core phase is larger than an oxidation number of niobium in the shell phase.

Core shell active material of monoclinic niobium-titanium composite oxide, nonaqueous electrolyte battery and battery pack

According to one embodiment, an electrode is provided. The electrode includes active material particles containing a niobium-titanium composite oxide. The active material particles include a first active material particle, and a second active material particle located with a space between the first active material particle and the second active material particle.

Electrode, nonaqueous electrolyte battery, battery pack and vehicle

An active material containing a monoclinic &#x3b2;-type titanium oxide or a monoclinic &#x3b2;-type titanium complex oxide. A carbonate ion is disposed on at least a part of a surface of the active material. The active material has a peak belonging to a carbonate ion in at least a. region of 1430&#xb1;30 cm, 1500&#xb1;30 cmand 2350&#xb1;30 cmin an infrared diffuse reflection spectrum obtained using a Fourier transform infrared spectrophotometer.

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

According to one embodiment, there is provided an active material. The active material includes particles of a Na-containing niobium titanium composite oxide having an orthorhombic crystal structure. An intensity ratio I/Iis within a range of 0.12&#x2264;I/I&#x2264;0.25 in an X-ray diffraction pattern of the active material, according to X-ray diffraction measurement using a Cu-K&#x3b1; ray. Iis a peak intensity of a peak Pthat is present within a range where 2&#x3b8; is 27&#xb0; to 28&#xb0; in the X-ray diffraction pattern of the active material. Iis a peak intensity of a peak Pthat is present within a range where 2&#x3b8; is 23&#xb0; to 24&#xb0; in the X-ray diffraction pattern of the active material.

Active material, nonaqueous electrolyte battery, battery pack and vehicle

A nonaqueous electrolyte solution secondary battery of the embodiment includes an exterior material, a nonaqueous electrolyte solution, a positive electrode, a negative electrode and a separator sandwiched between the positive electrode and the negative electrode. The nonaqueous electrolyte solution is charged in the exterior material. The nonaqueous electrolyte solution contains at least one of sulfone-based compounds represented by formula 1, a partially fluorinated ether represented by a molecular formula of formula 2, and at least one of lithium salts. The positive electrode is housed in the exterior material. The positive electrode contains a composite oxide represented by LMnNiMOas a positive electrode active material (wherein 0&#x2264;x&#x2264;1, 0&#x2264;(y+z)&#x2264;0.15, and M represents one, or two or more selected from Mg, Al, Ti, Fe, Co, Ni, Cu, Zn, Ga, Nb, Sn, Zr and Ta). The negative electrode is housed in the exterior material.

Nonaqueous electrolyte secondary battery and battery pack

According to one embodiment, a nonaqueous electrolyte battery including a positive electrode and a negative electrode is provided. The positive electrode includes LiNiMOwherein M is a metal element including Mn, and x is within a range of 0.5&#x2266;x&#x2266;1. The negative electrode includes graphitized material particles and a layer. The graphitized material particles have an interplanar spacing of (002), according to an X-ray diffraction method, of 0.337 nm or less. The layer includes a titanium-containing oxide. The layer covers at least a part of a surface of the graphitized material particles.

Growing community of inventors

Sagamihara, Japan

Wen Zhang