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Nissan Motor Company Limited

Yuuji Tanjo

Yasuhiko Ohsawa

Tatsuhiro Fukuzawa

Takashi Kimura

Manabu Suhara

Kazuo Sunahara

Fumio Munakata

Takuya Mihara

Hideaki Horie

Mikio Kawai

Takaaki Abe

Toyoaki Nakagawa

Ken Iwai

Osamu Shimamura

Tomaru Ogawa

A rechargeable lithium ion battery with high power density comprises a positive electrode; a negative electrode; and a non-aqueous electrolytic solution, in which the positive electrode includes a active material layer containing a positive electrode active material with the particle diameter of 5 &#x3bc;m or less and having the thickness at a range of 20 to 80 &#x3bc;m. Another rechargeable lithium ion battery with high power density comprises a positive electrode; a negative electrode; and a non-aqueous electrolytic solution, in which the positive electrode has two active material layers, each of which contains a positive electrode active material with a different diameter and has the thickness at a range of 20 to 30 &#x3bc;m.

Rechargeable lithium ion battery

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the formula Li A MnO , or the formula Li A Mn M O . The lithium-containing manganese composite oxide includes a lithium substitute metal A, such as Na, K, Ag, substituting for part of Li. The lithium substitution quantity x may be in the range of 0.03<x&lE;0.2.

Positive electrode material and battery for nonaquous electrolyte secondary battery

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li Mn M O . The lithium-containing manganese composite oxide is deficient in lithium with respect to the stoichiometric composition of a layered crystal structure represented by the general formula LiMeO . Part of Mn is replaced by a substitute metal such as Co, Ni, Fe, Al, Ga, In, V, Nb, Ta, Ti, Zr, Ce or Cr.

Positive electrode material and battery for nonaqueous electrolyte secondary battery

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-containing manganese layered composite oxide represented by the general formula Li1-xMO2-y-&dgr;Fy. The second metallic element or constituent M may be Mn or a combination of Mn and substitute metal such as Co, Ni, Cr, Fe, Al, Ga or In. A lithium deficiency quantity x is in the range of 0<x<1. An oxygen defect quantity &dgr; may be equal to or smaller than 0.2. A quantity y of fluorine substituting for part of oxygen is greater than zero.

A positive electrode active material for a nonaqueous electrolyte secondary battery includes at least a lithium-deficient manganese layered composite oxide represented by the general formula Li1-xMnO2-&dgr;. A lithium deficiency quantity x is in the range of 0.03<x&lE;0.5. An oxygen nonstoichiometry quantity &dgr; is equal to or smaller than 0.2.

Positive electrode material and cell for nonaqueous electrolyte secondary battery

There is provided a positive electrode comprising positive electrode active material granules which each are composed of lithium manganate; and a first surface layer which is formed on each of the positive electrode active material granules and is to transmit lithium (Li) ion but not manganese (Mn) ion therethrough.

Manganese-lithium ion electrolytic cell

A vehicle (V) includes a battery enclosure (,) enclosing a battery system (B). Each battery (B,) includes a cell (,) that comprises a rolled lamination (LM) of a positive sheet electrode (,) having layers (,) of positive-pole-oriented active substance coated on both side of a charge collecting sheet (,), a negative sheet electrode (,) having layers (,) of negative-pole-oriented active substance coated on both sides of another charge collecting sheet (,), and electrolyte-containing separator (,) between the layers of active substances. The batter further includes a cell enclosure (,) totally enclosing the cell. A gas effluent system (,) for the battery system comprises a gas release system (RS,) for generated gas in the cell of each battery to be released outside the cell enclosure, and a gas discharge system (DS) for released gas to be discharged outside the battery enclosure. The gas release system comprises gas release circuitry including a network (NT) of blanks (Cp: P&equals;1,2, . . . , q, . . . ) formed in the lamination, e.g. pointed or zoned blanks (,A,,) formed in the layer(s) of active substance(s) and/or the charge collecting electrode(s), a blank space (Sp) between the cell and the cell enclosure, and release valve (,). The gas discharge system comprises a gas discharge circuit (DC) communicable with the gas release circuitry, and provided as a draft controllable ducting (,) defined between a floor panel (,) of vehicle body (VB) and a wall of the battery enclosure.

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Yokohama, Japan

Yuuji Tanjo