Small particle electrodes by aerosol process
AssigneeArthur D. Little, Inc.
InventorsDenis G. Fauteux, Arthur A. Massucco, Ronnie D. Wilkins
Life of this patent
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Abstract
A method for preparing an electrode is provided including generating aerosol droplets of a precursor capable of being converted into a component of an electrode in a carrier liquid; converting the droplets into precursor particles; converting the precursor particles into particles of the electrode component; and depositing the electrode component onto an electrically conductive substrate. The electrode is characterized by a highly porous structure having a surface area in the range of >4 m.sup.2 /g and a discharge density at least 1.5 times greater than comparable electrodes prepared by conventional methods.
Claims42
A method for preparing an electrode, comprising the steps of:
- generating droplets of a solution of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- converting said precursor particles into particles of said active electrode material, wherein parameters for the conversion of the droplet into an active electrode material are controlled to obtain a predetermined particle configuration wherein the step of generating droplets of a solution of a precursor material in a carrier liquid comprises using a carrier liquid comprising a solvent and a diluent liquid.
A method for preparing an electrode, comprising the steps of:
- generating droplets of an emulsion of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- and
- converting said precursor particles into particles of said active electrode material.
A method for preparing an electrode, comprising the steps of:
- generating droplets of a solution of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- converting said precursor particles into particles of said active electrode material, wherein parameters for the conversion of the droplet into an active electrode material are controlled to obtain a predetermined particle configuration wherein the step of removing said carrier liquid from said droplets comprises forming an agglomeration of individual precursor particles.
A method for preparing an electrode, comprising the steps of:
- generating droplets of a solution of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- converting said precursor particles into particles of said active electrode material, wherein parameters for the conversion of the droplet into an active electrode material are controlled to obtain a predetermined particle configuration the step of converting said precursor particles into said active electrode material particles comprises thermally treating said precursor particles in a moving gas stream.
A method for preparing an electrode, comprising the steps of:
- generating droplets of a solution of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- converting said precursor particles into particles of said active electrode material, wherein parameters for the conversion of the droplet into an active electrode material are controlled to obtain a predetermined particle configuration:
- depositing said active electrode material onto an electrically conductive substrate.
A method for preparing an electrode, comprising the steps of:
- generating droplets of a solution of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- converting said precursor particles into particles of said active electrode material, wherein parameters for the conversion of the droplet into an active electrode material are controlled to obtain a predetermined particle configuration wherein the step of converting said precursor particle into said active electrode material particles comprises:
- heating the precursor particles in a moving gas stream, the heat sufficient to partially convert said precursor particles to said active electrode intermediate component;
- collecting said partially converted active electrode material intermediate component particles and
- heating the partially converted material under conditions sufficient to obtain said electrode material.
A method for preparing an electrode, comprising:
- generating droplets of a solution or emulsion of a precursor material in a carrier liquid, using a carrier liquid comprising a solvent and a diluent liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor articles;
- and
- converting said precursor particles into particles of said active electrode material.
A method for preparing an electrode comprising:
- generating droplets of a solution or emulsion of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor articles;
- heating the precursor particles in a moving gas stream, the heat sufficient to partially convert said precursor particles to an active electrode intermediate component;
- collecting said partially converted active electrode material intermediate component particles;
- and
- heating the partially converted material under conditions sufficient to obtain said active electrode material.
A method for preparing an electrode, comprising:
- generating droplets of a solution of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing droplets of particles not having a predetermined particle property;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- converting said precursor particles into particles of said active electrode material.
A method for preparing an electrode, comprising the steps of:
- generating droplets of a solution of a precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode and selected from the group consisting of metal acetates and metal alkoxides;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles;
- and
- converting said precursor particles into particles of said active electrode material.
A method for preparing an electrode, comprising:
- generating droplets of a solution or emulsion of a first precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles, so as to form a first airborne particle stream;
- generating droplets of a solution or emulsion of a second precursor material in a carrier liquid, said precursor material capable of being converted into an active material of an electrode;
- removing at least a portion of said carrier liquid from said droplet to form precursor particles, so as to form a second airborne particle stream;
- commingling the first and second airborne particle streams;
- converting said precursor particles into particles of said active electrode material;
- and
- depositing said active electrode material onto an electrically conductive substrate.
Dependencies are inferred from the claim text.