金属成分の組成に勾配を有するリチウム遷移金属酸化物

Japanese Patent JP4954476

B2

Disclosed are primary materials, precursor materials and final materials as well as methods to prepare these materials. The final materials are mixed lithium transition metal oxides, useful as performance optimized cathode materials for rechargeable lithium batteries. The transition metal is a solid solution mixture of manganese, nickel and cobalt, M=(Mn l-u Ni u ) l-u-y Co y , with 0.2 < u < 0.7 and 0.1 < y < 0.9 where the transition metal composition of cobalt, as well of manganese-nickel changes significantly from the inner bulk towards the outer bulk. This allows to account for different performance requirements of inner bulk, outer bulk and surface. The final materials are prepared by solid state reaction from precursor materials, which are prepared from primary materials. The primary materials can contain additional anions or cations. The primary materials are prepared by a coprecipitation reaction, where a hydroxide or carbonate based transition metal compound is precipitated onto the surface of seed-particles, the precipitation being characterized by a transition metal composition of the precipitate that differs significantly from the transition metal composition of the seed-particles.

Jens-Martin, Paulsen
Lee, Kee Yang
Bae, Jeong-sun
Kim, Moon-ju

JP2004548141A

June 13, 2012

October 30, 2003

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LG HAUSYS,LTD.

C01G53/00; C01D15/02; C01G45/02; C01G51/04; C01G53/04; H01M4/04; H01M4/131; H01M4/1315; H01M4/1391; H01M4/13915; H01M4/50; H01M4/505; H01M4/52; H01M4/525; H01M4/583; H01M10/05; H01M4/02; H01M10/0525; H01M10/24; H01M10/36

JP7235292A
JP2002170563A
JP9035715A
JP10236826A
JP2001348224A
JP11071114A
JP4087152A
JP2000164214A
JP8162114A
JP9050810A

Kenji Yoshitake
Yukitaka Nakamura
Konno Akio
Noritaka Yokota
Takeshi Katata

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