# US 5,705,292 A · Lithium ion secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,705,292 A - Document ID: US5705292A - Status: Granted - Kind: A - Application number: 08/666,688 - Filed: 1996-06-18 - Granted: 1998-01-06 - Earliest claimed: 1995-06-19 - Assignees: Sony Corporation - Inventors: Yasuo Yukita; Nobuhiro Fujiwara; Yukio Noda; Kazuya Kojima - Web page: https://patentgrep.com/patent/US5705292A ## CPC - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes - H01M 6/10: with wound or folded electrodes - H01M 6/40: Printed batteries {, e.g. thin film batteries} - H01M 6/42: Grouping of primary cells into batteries (H01M6/40 takes precedence) - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/342: Non-re-sealable arrangements - H01M 2200/10: Temperature sensitive devices - Y02E 60/10: Energy storage using batteries - Y10T 29/49112: including laminating of indefinite length material - Y10T 29/49115: including coating or impregnating - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A lithium ion secondary battery according to the present invention includes a positive electrode, a negative electrode, a separator, and a heat-resistant and heat-insulating film having pores. The heat-resistant and heat-insulating film is formed on at least one of surfaces opposed to each other of the positive and negative electrodes. The positive electrode and the negative electrodes are laminated through the separator. The heat-resistant and heat-insulating film contains metal oxide, metal carbonate or metal nitride. The heat-resistant and heat-insulating film is formed by spraying powders of metal oxide, metal carbonate or metal nitride. The spraying is plasma spraying. A surface where the positive electrode and the negative electrode are not opposed to each other is provided. On at least one of surfaces forming the interface, the heat-resistant and heat-insulating film is formed by spraying powders of metal oxide, metal nitride or the like. ## Claims ### Claim 1 A lithium ion secondary battery comprising: a positive electrode comprising lithium ion generating substance; a negative electrode; a separator; and a heat-resistant and heat-insulating film having pores and formed on at least one of surfaces opposed to each other of said positive and negative electrodes, wherein said heat-resistant and heat-insulating film contains at least one material selected from the group consisting of metal oxide, metal carbonate and metal nitride, wherein said positive electrode and said negative electrode are laminated through said separator. ### Claim 2 (depends on 1) A lithium ion secondary battery according to claim 1, wherein said heat-resistant and heat-insulating film contains alumina, zirconia, alumina zirconia or magnesium zirconate. ### Claim 3 A method of manufacturing a lithium ion secondary battery, comprising the steps of: forming a positive electrode comprising lithium ion generating substance; forming a negative electrode; forming a heat-resistant and heat-insulating film having pores and formed on at least one of surfaces opposed to each other of said positive and negative electrodes, wherein said heat-resistant and heat-insulating film is formed by spraying powders made of at least one material selected from the group consisting of metal oxide, metal carbonate and metal nitride; and laminating said positive and negative electrodes through a separator. ### Claim 4 (depends on 3) A method of manufacturing a lithium ion secondary battery according to claim 3, wherein said spraying is plasma spraying. ### Claim 5 A lithium ion secondary battery comprising: a positive electrode comprising lithium ion generating substance; a negative electrode; a separator; and a heat-resistant and heat-insulating film formed on at least one of surfaces, which are not opposed to each other, of said positive and negative electrodes, wherein said positive electrode and said negative electrode are laminated through said separator, wherein said heat-resistant and heat-insulating film contains at least one material selected from the group consisting of metal oxide, metal carbonate or metal nitride. ### Claim 6 (depends on 5) A lithium ion secondary battery according to claim 5, wherein said heat-resistant and heat-insulating film contains alumina, zirconia, alumina zirconia or magnesium zirconate. ### Claim 7 (depends on 5) A lithium ion secondary battery according to claim 5, wherein said heat-resistant, and heat-insulating film is not formed on either of surfaces opposed to each other of said positive and negative electrodes. ### Claim 8 (depends on 5) A lithium ion secondary battery according to claim 5, wherein a second heat-resistant and heat-insulating film is formed on at least one of surfaces opposed to each other of said positive and negative electrodes. ### Claim 9 A method of manufacturing a lithium ion secondary battery, comprising the steps of: forming a positive electrode comprising lithium ion generating substance; forming a negative electrode; forming a heat-resistant and heat-insulating film having pores and formed on at least one of surfaces, which are not opposed to each other, of said positive and negative electrodes, wherein said heat-resistant and heat-insulating film is formed by spraying powders of metal oxide, metal carbonate or metal nitride; and laminating said positive and negative electrodes through a separator. ### Claim 10 (depends on 9) A method of manufacturing a lithium ion secondary battery according to claim 9, wherein said spraying is plasma spraying. ### Claim 11 (depends on 9) A method of manufacturing a lithium ion secondary battery according to claim 9, wherein a second heat-resistant and heat-insulating film is formed on at least one of surfaces opposed to each other of said positive and negative electrodes, by spaying powders of metal oxide, metal carbonate or metal nitride. ### Claim 12 A lithium ion secondary battery comprising: a positive electrode comprising positive electrode collector comprising two opposing surfaces, at least one of which is coated with a positive electrode mixture comprising a lithium ion generating substance and the other of which is coated with a heat-resistant and heat-insulating film having pores, the heat-resistant and heat-insulating film comprising at least one material selected from the group consisting of metal oxide, metal carbonate and metal nitride, a negative electrode comprising a negative electrode collector comprising two opposing surfaces, both of which are coated with a negative electrode mixture, a separator disposed between the positive and negative electrodes and laminating the positive and negative electrodes together. ### Claim 13 (depends on 12) The battery of claim 12 wherein the separator is disposed between the negative electrode mixture and the positive electrode mixture. ### Claim 14 (depends on 12) The battery of claim 12 wherein the separator comprises a bag-like structure that envelopes the negative electrode. ### Claim 15 (depends on 12) The battery of claim 12 wherein the separator comprises a bag-like structure that envelopes the positive electrode. ### Claim 16 (depends on 12) The battery of claim 12 wherein the separator is disposed between the positive electrode mixture and the heat-resistant and heat-insulating film. ### Claim 17 (depends on 12) The battery of claim 12 wherein both surfaces of the positive electrode collector are coated with layers of the positive electrode mixture each layer of positive electrode mixture is coated with a layer of the heat-resistant and heat-insulating film. ### Claim 18 A method of manufacturing a lithium ion secondary battery comprising the following steps: providing a positive electrode collector comprising two opposing surfaces, coating at least one the positive electrode collector surfaces with a positive electrode mixture comprising a lithium ion generating substance, coating the other of the positive electrode collector surfaces with a heat-resistant and heat-insulating film having pores, the heat-resistant and heat-insulating film comprising at least one material selected from the group consisting of metal oxide, metal carbonate and metal nitride, providing a negative electrode collector comprising two opposing surfaces, coating both surfaces of the negative electrode collector with a negative electrode mixture, laminating the positive and negative electrodes together with a separator. ### Claim 19 (depends on 18) The method of claim 18 wherein the separator is disposed between the negative electrode mixture and the positive electrode mixture. ### Claim 20 (depends on 18) The method of claim 18 wherein the separator comprises a bag-like structure the envelopes the negative electrode. ### Claim 21 (depends on 18) The method of claim 18 wherein the separator comprises a bag-like structure the envelopes the positive electrode. ### Claim 22 (depends on 18) The method of claim 18 wherein the separator is disposed between the positive electrode mixture and the heat-resistant and heat-insulating film. ### Claim 23 (depends on 18) The method of claim 18 wherein both surfaces of the positive electrode are coated with the positive electrode mixture and with the heat-resistant and heat-insulating film on top of the positive electrode mixture.