Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Kabushiki Kaihsa Toshiba

Hidesato Saruwatari

Norio Takami

Dai Yamamoto

Hiroki Inagaki

Hiromichi Kuriyama

Hideaki Morishima

Shinsuke Matsuno

Hideki Satake

Takashi Kuboki

Yumi Fujita

Kazuya Kuriyama

Tetsuro Kano

Yuki Watanabe

Hikaru Yoshikawa

Masanori Tanaka

Yoshiyuki Isozaki

Asato Kondo

Masataka Shikota

Yoshinao Tatebayashi

Takashi Kishi

Haruchika Ishii

Yasuaki Murashi

Genki Yamagishi

Koji Takazawa

Takahiro Hirai

Tetsuya Sasakawa

Naoki Nishio

Hiroshi Watanabe

Yasuhiro Harada

Takuya Iwasaki

Mitsuo Kasori

Hirotaka Hayashida

Nobuyasu Negishi

Hiroko Watando

Asuna Hagiwara

Sayaka Morimoto

According to one embodiment, there is provided a nonaqueous electrolyte battery including a positive electrode, a negative electrode, a nonaqueous electrolyte and a separator. The positive electrode includes a positive electrode active material containing LiNiCoMnMO(0.9&#x3c;x&#x2264;1.25, 0&#x3c;a&#x2264;0.4, 0&#x2264;b&#x2264;0.45, 0&#x2264;c&#x2264;0.1, and M represents at least one element selected from the group consisting of Mg, Al, Si, Ti, Zn, Zr, Ca, and Sn). The separator includes polyester. A pore volume in a pore size distribution according to a mercury intrusion porosimetry is in a range of 0.9 cm/g to 3 cm/g. An air permeability value according to a Gurley method is in a range of 2 sec/100 ml to 15 sec/100 ml.

Nonaqueous electrolyte battery, battery pack and positive electrode

According to one embodiment, there is provided a nonaqueous electrolyte battery including a positive electrode. The positive electrode includes a positive electrode active material-containing layer. The positive electrode active material-containing layer includes at least one lithium-nickel composite oxide and a conductive agent. The positive electrode active material-containing layer has, in a particle size distribution obtained by a laser diffraction scattering method, an average particle diameter dwithin a range of 1 &#x3bc;m to 5.5 &#x3bc;m, a maximum particle diameter within a range of 10 &#x3bc;m to 100 &#x3bc;m, a particle diameter dwithin a range of 0.5 &#x3bc;m to 3 &#x3bc;m, and X, represented by X=(d&#x2212;d)/d, within a range of 0.5 to less than 1.

Nonaqueous electrolyte battery

According to one embodiment, there is provided a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode including a negative electrode active material layer, and a non-aqueous electrolyte. The negative electrode active material layer contains carbon dioxide and releases the carbon dioxide in the range of 0.1 ml to 5 ml per 1 g when heated at 200&#xb0; C. for 1 minute.

Non-aqueous electrolyte secondary battery and production method thereof

According to an embodiment, a nonaqueous electrolyte battery is provided. The nonaqueous electrolyte includes a negative electrode, a positive electrode and a nonaqueous electrolyte. The negative electrode includes negative electrode active material particles. The negative electrode active material particles include a spinel-type lithium titanate. The negative electrode has such a surface state that a ratio A/Aof an Li atom abundance ratio Ato a Ti atom abundance ratio A, according to a photoelectron spectroscopic measurement for a surface, is increased at a rate of 0.002 to 0.02 per cycle in a charge-and-discharge cycle test under the predetermined condition.

According to one embodiment, there is provided a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte. The negative electrode includes a negative electrode material layer. The negative electrode material layer includes a negative electrode active material capable of absorbing and releasing lithium at a potential of 0.78 V (vs. Li/Li) or more. A film containing a compound having a propylene glycol backbone is formed on at least a part of a surface of the negative electrode material layer. A content of the compound having the propylene glycol backbone in the film is 2 &#x3bc;mol to 40 &#x3bc;mol per g of a weight of the negative electrode material layer.

According to one embodiment, a nonaqueous electrolyte battery includes a negative electrode and a nonaqueous electrolyte. The negative electrode includes a negative electrode active material and a binder. The negative electrode active material contains monoclinic titanium dioxide or LiTiO(here, &#x2212;0.5&#x2264;a&#x2264;3). The binder includes polyvinylidene fluoride with a molecular weight of 400,000 to 1,000,000. The negative electrode satisfies a formula (I) below. The nonaqueous electrolyte contains at least one of difluorophosphate and monofluorophosphate.0.1&#x2264;(P2/P1)&#x2264;0.4&#x2003;&#x2003;(I)

Nonaqueous electrolyte battery and battery pack

According to an embodiment, there is provided a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a positive electrode, a negative electrode, a separator sandwiched between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative electrode contains a negative electrode active material having a Li-absorbing potential of 1 V vs. Li/Lior more. An electrical resistance of the negative electrode in a discharged state is within a range of 100 &#x3a9;&#xb7;cm to 100000 &#x3a9;&#xb7;cm. A pore volume ratio of pores having a pore diameter of 1 &#x3bc;m or more in the separator is more than 70%. The pore volume ratio is determined from a cumulative pore volume frequency curve of the separator obtained by a mercury intrusion porosimetry.

According to one embodiment, there is provided a nonaqueous electrolyte battery including a positive electrode, a negative electrode and a nonaqueous electrolyte. The positive electrode includes a positive electrode active material layer including a lithium nickel cobalt manganese composite oxide. The negative electrode includes a negative electrode active material layer including a spinel type lithium titanate. The nonaqueous electrolyte has an ion conductivity of not less than 7 mS/cm and not more than 10 mS/cm at 25&#xb0; C. A capacity ratio p/n is within a range of not less than 1.4 and not more than 1.8. A thickness ratio T/Tis within a range of not less than 1.05 and less than 1.3. A ratio P/Pis within a range of not less than 0.55 and less than 0.8.

Nonaqueous electrolyte battery including positive electrode including lithium nickel cobalt manganese composite oxide and negative electrode including spinel type lithium titanate, and nonaqueous electrolyte

According to an embodiment, a nonaqueous electrolyte battery including an electrode group and a nonaqueous electrolyte is provided. The electrode group is formed by winding a positive electrode, a negative electrode, and a separator arranged between the positive electrode and the negative electrode. The tension modulus of the separator in the winding direction is within a range of 200 (N/mm) to 2,000 (N/mm).

According to one embodiment, there is provided a nonaqueous electrolyte battery including a nonaqueous electrolyte, a positive electrode and a negative electrode. The positive electrode includes a positive electrode current collector containing Al, and a positive electrode active material containing layer. The negative electrode includes a negative electrode current collector containing Al, and a negative electrode active material containing layer. The negative electrode active material containing layer includes titanium-containing oxide particles having an average secondary particle size of more than 5 &#x3bc;m. The nonaqueous electrolyte battery satisfies a formula (1) of Lp&#x3c;Ln.

Nonaqueous electrolyte battery, battery module, and battery pack

According to one embodiment, an electrode is provided. The electrode includes an electrode mixture layer and a current collector. The electrode mixture layer contains active material particles. The electrode mixture layer includes a first surface being in contact with the current collector and a second surface separated from the first surface by a thickness of the electrode mixture layer. The electrode mixture layer includes a first portion having the first surface and a second portion having the second surface. In the first portion, a first oxide layer is formed on the active material particle. In the second portion, a second oxide layer is formed on the active material particles. The thickness of the first oxide layer is more than the thickness of the second oxide layer.

Electrode and nonaqueous electrolyte battery

Growing community of inventors

Kawasaki, Japan

Hidesato Saruwatari