Toda Kogyo Corporation

Denka Company Limited

Basf Toda Battery Materials LLC

Takahiko Sugihara

Teruaki Santoki

Takashi Kawasaki

Hiroshi Yokota

Hideaki Sadamura

Akihisa Kajiyama

Kazutoshi Matsumoto

Akira Yoda

Kazutoshi Ishizaki

Kazuhiko Kikuya

Ryuta Masaki

Daisuke Nishikawa

Yuji Mishima

Daisuke Morita

Kazumichi Koga

Tsuyoshi Wakiyama

Taro Inada

Hiroyoshi Noguchi

Satoshi Nakamura

Junji Kashiwagi

Takamitsu Harada

Masaki Nishimura

Excellent thermal stability in addition to excellent cycle property with maintaining a sufficient battery capacity is shown by positive electrode active material particles having a layered rock salt structure, represented by the compositional formula: (LiX)(NiCoXZ)O, in the compositional formula: X is a divalent metallic element capable of substituting for Li-site; Z is a metallic element containing at least Al and/or Mn, other than X; 0.93≤γ≤1.15; 0.82≤a<1.00; 0≤b≤0.12; 0.001≤c+e≤0.040; 0≤d≤0.10; and a+b+c+d=1.

Positive electrode active material particles for non-aqueous electrolyte secondary batteries and method for producing same, and non-aqueous electrolyte secondary battery

An object of the present invention is to provide a positive electrode mixture capable of conducting stable charging and discharging with a less amount of gasses generated which has an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium. The present invention relates to a positive electrode mixture comprising carbon black having a bulk density of not more than 0.1 g/cm, a crystallite size of 10 to 40 &#x212b;, an iodine adsorption of 1 to 150 mg/g, a volatile content of not more than 0.1% and a metal impurity content of not more than 20 ppm, and a positive electrode active substance having an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium.

Positive electrode mixture and non-aqueous electrolyte secondary battery

The present invention relates to Li-Ni composite oxide particles that exhibit a high initial discharge capacity and are excellent in thermal stability when used as a positive electrode active substance for non-aqueous electrolyte secondary batteries, and a process for producing the Li-Nicomposite oxide particles. The Li-Ni composite oxide particles of the present invention have a composition of LiNiCoM1M2Owherein x, y, a and b represent 1.00&#x2266;x&#x2266;1.10; 0&#x3c;y&#x2266;0.25; 0&#x3c;a&#x2266;0.25; and 0&#x2266;b&#x2266;0.10, respectively; M1 is at least one element selected from the group consisting of Al and Mn; and M2 is at least one element selected from the group consisting of Zr and Mg, in which a product of a metal occupancy (%) of lithium sites of the Li-Ni composite oxide as determined by Rietveld analysis of X-ray diffraction thereof and a crystallite size (nm) of the Li-Ni composite oxide as determined by the Rietveld analysis is not less than 700 and not more than 1400.

Li-Ni composite oxide particles and process for producing the same, and non-aqueous electrolyte secondary battery

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Sanyoonoda, Japan

Takahiko Sugihara