Kabushiki Kaisha Toyota Jidoshokki

Toyota Jidosha Kabushiki Kaisha

Masanori Harata

Jun Yoshida

Kazuhiro Suzuki

Nobuhiro Goda

Takashi Mohri

Mitsutoshi Otaki

Hiroki Oshima

Tsukasa Sugie

Dai Matsushiro

Shinji Nakanishi

Masataka Nakanishi

Daichi Kosaka

Takefumi Fukumoto

Masakazu Murase

Kyoichi Kinoshita

Motoharu Tanizawa

Tatsuya Eguchi

Yasuhiro Yamaguchi

Keita Yamana

A main object of the present disclosure is to provide an active material wherein a volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material comprising a silicon clathrate II type crystal phase, including a void inside a primary particle, and a void amount of the void with a fine pore diameter of 100 nm or less is 0.05 cc/g or more and 0.15 cc/g or less.

Active material, anode layer, battery, and methods for producing these

A main object of the present disclosure is to provide an active material wherein a volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material comprising a silicon clathrate II type crystal phase, and having a composition represented by NaSi, wherein 1.98<x<2.54.

Provided is a negative electrode active material that contains silicon clathrate II and that is suitable for a negative electrode of a lithium ion secondary battery. The negative electrode active material includes a silicon material in which silicon clathrate II represented by composition formula NaSi(0&#x2264;x&#x2264;10) is contained and a volume of a pore having a diameter of not greater than 100 nm is not less than 0.025 cm/g.

Negative electrode active material containing silicon clathrate II

Provided is a novel production method for producing silicon clathrate II. In the production method for producing silicon clathrate II, in a reaction system in which a Na&#x2014;Si alloy containing Na and Si and an Na getter agent coexist so as not to be in contact with each other, the Na&#x2014;Si alloy is heated and Na evaporated from the Na&#x2014;Si alloy is thus caused to react with the Na getter agent to reduce an amount of Na in the Na&#x2014;Si alloy.

Production method for producing silicon clathrate II

A method for producing a silicon material, the method including:

Method for producing silicon material

An active material expressed by a general formula; LiNiCoMnDO(where 0.2&#x2264;'a'&#x2264;1, 'b'+&#x201c;c&#x201d;+&#x201c;d&#x201d;+&#x201c;e&#x201d;=1, 0&#x2264;&#x201c;e&#x201d;&#x3c;1, &#x201c;D&#x201d; is at least one element selected from the group consisting of Li, Fe, Cr, Cu, Zn, Ca, Mg, Zr, S, Si, Na, K and Al, and 1.7&#x2264;&#x201c;f&#x201d;&#x2264;2.1) includes a high manganese portion, which is made of a metallic oxide including Ni, Co and Mn at least and of which the composition ratio between Ni, Co and Mn is expressed by Ni:Co:Mn=b2:c2:d2 (note that &#x201c;b2&#x201d;+&#x201c;c2&#x201d;+&#x201c;d2&#x201d;=1, 0&#x3c;&#x201c;b2&#x201d;&#x3c;1, 0&#x3c;&#x201c;c2&#x201d;&#x3c;&#x201c;c&#x201d;, and &#x201c;d&#x201d;&#x3c;&#x201c;d2&#x201d;&#x3c;1), in a superficial layer thereof.

Active material excelling in high-voltage characteristics

A lithium composite metallic oxide expressed by: LiNiCoMnDO(where 0.2&#x2264;'a'&#x2264;1.5, 'b'+&#x201c;c&#x201d;+&#x201c;d&#x201d;+&#x201c;e&#x201d;=1, 0&#x3c;&#x201c;e&#x201d;&#x3c;1, &#x201c;D&#x201d; is at least one of the following elements: Fe, Cr, Cu, Zn, Ca, Mg, Zr, S, Si, Na, K, Al, Ti, P, Ga, Ge, V, Mo, Nb, W, La, Hf and Rf, and 1.7&#x2264;&#x201c;f&#x201d;&#x2264;2.1), and including: a high manganese portion, which is made of a metallic oxide including Ni, Co and Mn at least and of which the composition ratio between Ni, Co and Mn is expressed by Ni:Co:Mn=g:h:i (note that &#x201c;g&#x201d;+&#x201c;h&#x201d;+&#x201c;i&#x201d;=1, 0&#x3c;&#x201c;g&#x201d;&#x3c;1, 0&#x3c;&#x201c;h&#x201d;&#x3c;&#x201c;c&#x201d;, and &#x201c;d&#x201d;&#x3c;&#x201c;i&#x201d;&#x3c;1), in a superficial layer thereof; and a metallic oxidation portion in an outermost superficial layer of the high manganese portion.

Lithium composite metallic oxide and production process for the same

Provided is a method for producing a CaSi-containing composition, the method including:

[object Object]

A silicon material useful as a negative electrode active material is provided. The silicon material has an Si/O atom ratio within a range of greater than 1/0.5 and not greater than 1/0.1 and a band gap within a range of greater than 1.1 eV and not greater than 2.1 eV. A secondary battery in which this silicon material is used as a negative electrode active material has long life.

Silicon material and negative electrode of secondary battery

A silicon material useful as a negative electrode active material is provided. The silicon material has a band gap within a range of greater than 1.1 eV and not greater than 1.7 eV. A secondary battery in which this silicon material is used as a negative electrode active material has improved initial efficiency.

A novel silicon material is provided. An MSix-containing silicon material contains MSix (M is at least one element selected from the group 3 to 9 elements. 1/3&#x2264;x&#x2264;3) in a silicon matrix.

MSix-containing silicon material (M is at least one element selected from group 3 to 9 elements. &#x2153;&#x3c;=x&#x3c;=3) and method for producing same

An iron alloy according to the present invention comprises: Al in an amount of from 3 to 5.5%; Mn in an amount from 0.2 to 6%; and the balance being iron (Fe), and inevitable impurities and/or a modifying element; when the entirety is taken as 100%. Since a high damping factor is obtainable at a low-strain amplitude, this iron alloy demonstrates a stable damping property even in a high-temperature region. Moreover, since the alloying elements are Al and Mn alone, and since their contents are less, the iron alloy according to the present invention is low in cost.

Growing community of inventors

Kariya, Japan

Masanori Harata