Titanium-niobium composite oxide-based electrode active material and lithium secondary battery using the same
AssigneesTitan Kogyo Kabushiki Kaisha, Kabushiki Kaisha Toshiba
InventorsKiyoshi Nakahara, Toshimasa Seki, Hidenori Ishioka, Wataru Mino, Yasuhiro Harada, Norio Takami, Hiroki Inagaki
Life of this patent
Estimating the term…
Abstract
An electrode active material comprising in major proportions a monoclinic titanium-niobium composite oxide represented by the formula TiNbxO(2+5x/2), wherein X is from 1.90 or more to less than 2.00.
Claims11
An electrode active material comprising in major proportions a monoclinic titanium-niobium composite oxide represented by the formula TiNbxO(2+5x/2), wherein X is from 1.90 or more to less than 2.00.
A battery electrode comprising an electrode active material comprising in major proportions a monoclinic titanium-niobium composite oxide represented by the formula TiNbxO(2+5x/2), wherein X is from 1.90 or more to less than 2.00 as a cathode or anode active material.
A lithium secondary battery comprising a battery electrode comprising an electrode active material comprising in major proportions a monoclinic titanium-niobium composite oxide represented by the formula TiNbxO(2+5x/2), wherein X is from 1.90 or more to less than 2.00 as a cathode or anode active material.
A method for producing an electrode active material comprising in major proportions a monoclinic titanium-niobium composite oxide represented by the formula TiNbxO(2+5x/2), wherein X is from 1.90 or more to less than 2.00, the method comprising:
- mixing a titanium source material and a niobium source material in a Nb/Ti molar ratio of from 1.90 or more to less than 2.00 to prepare a source material mixture;
- and
- firing the source material mixture at 1000 to 1300° C. under an oxidizing atmosphere to prepare a fired product.
Dependencies are inferred from the claim text.