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US 2015/0086850 A1Published application
Anode for secondary battery, method for producing same, and secondary battery
AssigneeShowa Denko K.K.
InventorsHitoshi Yokouchi, Masahiro Ohmori, Chiaki Sotowa, Masayuki Sanbayashi
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Abstract
In this anode for a secondary battery, method for producing same, and secondary battery, an anode active material is laminated on a surface of a metal foil, the anode active material contains at least titanium dioxide, and the titanium dioxide contains a Brookite crystal phase and contains an amorphous phase in a ratio of 1 vol % to 20 vol %.
Claims14
An anode for a secondary battery obtained by laminating a layer containing at least an anode active material on a metal foil,
- wherein the anode active material contains at least titanium dioxide, and
- the titanium dioxide includes a brookite-type crystal phase, and includes an amorphous phase in a ratio of 1 vol % to 20 vol % with respect to all crystal phases.
A method for producing an anode for a secondary battery, comprising in the following order:
- a step of synthesizing powder containing at least the titanium dioxide by hydrolyzing a titanium-containing compound in an acidic aqueous solution so as to generate titanium dioxide, and then drying the titanium dioxide;
- a step of annealing the powder so as to control the titanium dioxide contained in the powder to have a structure including at least a brookite-type crystal phase and further including an amorphous phase in a range of 1 vol % to 20 vol %, thereby generating a powder-form anode active material;
- and
- a step of dispersing the powder-form anode active material in a dispersion solution so as to adjust a coating fluid, applying and drying the coating fluid on one surface or both surfaces of a metal foil.
1 more element
Dependencies are inferred from the claim text.