# US 12,183,911 B2 · Positive particle electrode for a secondary battery and method for producing same from a nanofibre membrane structure

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- Number: US 12,183,911 B2
- Document ID: US12183911B2
- Status: Granted
- Kind: B2
- Application number: 17/616,967
- Filed: 2019-12-12
- Published: 2022-10-20
- Granted: 2024-12-31
- Earliest claimed: 2019-09-26
- Assignees: Instituto Tecnologico De Santo Domingo
- Applicants: Instituto Tecnologico De Santo Domingo
- Inventors: Melvin Santiago Arias Polanco; Lorenzo Caputi; Noel Alfonso Upia De La Rosa; Alina Mari De Los Santos Torres
- Web page: https://patentgrep.com/patent/US12183911B2

## CPC

- H01M 4/043: {involving compressing or compaction}
- H01M 10/054: Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
- C01G 45/1242: of the type (Mn2O4)-, e.g. LiMn2O4 or Li(MxMn2-x)O4
- H01M 4/0411: {by extrusion}
- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- C01P 2002/32: spinel-type (AB2O4)
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2004/03: obtained by SEM
- C01P 2006/40: Electric properties
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A positive electrode of an active material of interconnected polycrystalline and porous particles for secondary battery has been developed to achieve greater diffusion, excellent specific capacity and life cycle. The active material of the positive electrode for secondary battery is obtained from a hot-pressing process to which the composite fiber membrane is subjected with the precursors of the active metals and the polymer, obtaining morphologies such as monocrystalline particles, two-dimensional plates, and bars.

## Claims

### Claim 1

A method for manufacturing an active material as a positive electrode for a secondary lithium-ion battery, a sodium ion battery, or a magnesium ion battery, the method comprising the steps of:
mixing a solvent, at least one polymer, and at least one metal precursor, to produce a solution;
centrifuging the solution using an electric field to produce fibers;
calcinating the fibers to a temperature between 250 to 1000° C. in an air atmosphere, an oxidizing inert atmosphere, or combination thereof, to produce calcinated fibers;
pressing between two plates the calcinated fibers to produce a fiber membrane, wherein the calcinating step and the pressing step are done simultaneously;
producing the positive electrode by using the fiber membrane from the previous step;
wherein the metal precursor is selected from the group consisting of acetates, carbonates, and nitrates and includes at least two metals selected from the group consisting of alkaline metals, alkaline earth metals; transition metals; and metals from groups 13 and 14; and
wherein the fibers of the fiber membrane have an average diameter between 10 to 2000 nm.

### Claim 2 (depends on 1)

The method of claim 1, wherein the mixing step further includes adding at least one non-metal element selected from the group consisting of phosphorus, carbon, fluoride, and sulfur.

### Claim 3 (depends on 1)

The method of claim 1, wherein the at least one polymers is selected from the group consisting of polyvinyl alcohol (PVA), polyvinyl acetate (PVAc), polyethylene oxide (PEO), polyurethane, urethane polyether, polyurethane copolymer, cellulose acetate, cellulose butyrate acetate, cellulose acetate propionate, bromomethacrylate acrylate (PMMA), polymethyl acrylate (PMA), polyacrylic copolymer, polyvinyl acetate copolymer, polymerized furfuryl alcohol (PPFA), polystyrene, polystyrene copolymer, poly(polypropylene oxide) (PPO), polyethylene oxide copolymer, polypropylene oxide copolymer, polycarbonate (PC), polyvinyl chloride (PVC), polycaprolactone, polyvinylpyrrolidone (PVP), polyvinyl fluoride (PVF), polyvinylidene fluoride (PVDF), polyamide, polyacrylonitrile (PAN), tar, and mixtures thereof.

### Claim 4 (depends on 1)

The method of claim 1, wherein the alkaline metals are selected from the group consisting of lithium, sodium, potassium, and rubidium.

### Claim 5 (depends on 1)

The method of claim 1, wherein the alkaline earth metals are selected from the group consisting of beryllium, magnesium, calcium, and strontium.

### Claim 6 (depends on 1)

The method of claim 1, wherein the transition metals are selected from the group consisting of titanium, vanadium, chromium, manganese, iron, chromium, nickel, copper, zinc, palladium molybdenum, and silver.

### Claim 7 (depends on 1)

The method of claim 1, wherein the metals from groups 13 and 14 are selected from the group consisting of aluminum, indium, titanium, tin, and germanium.

### Claim 8 (depends on 1)

The method of claim 1, wherein the solvent is selected from the group consisting of water, dimethylformamide, acetone, methanol, ether, and toluene.