# US 2019/0173094 A1 · Lithium battery and cathode foil thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173094 A1 - Document ID: US20190173094A1 - Status: Published application - Kind: A1 - Application number: 15/878,811 - Filed: 2018-01-24 - Published: 2019-06-06 - Earliest claimed: 2017-12-04 - Assignees: Apaq Technology Co., Ltd. - Applicants: Apaq Technology Co., Ltd. - Inventors: MING-GOO CHIEN - Web page: https://patentgrep.com/patent/US20190173094A1 ## CPC - H01M 4/70: characterised by shape or form - H01G 9/04: Electrodes {or formation of dielectric layers thereon} - H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/134: Electrodes based on metals, Si or alloys - H01M 4/38: of elements or alloys - H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)} - H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres} - H01M 4/667: {in the form of layers, e.g. coatings} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01G 9/042: characterised by the material (H01G11/22 takes precedence) - H01G 9/048: characterised by their structure (H01G11/22 takes precedence) - H01M 4/0426: {Sputtering} - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present disclosure provides a lithium battery and a cathode foil thereof. The cathode foil includes a base material layer, a first material layer formed on the base material layer, and a second material layer including a plurality of particle structure groups disposed inside the first material layer. Each of the particle structure groups includes a plurality of particle structures connected with each other. One of the first material layer and the second material layer is formed by a pure silicon material without impurities, and another one of the first material layer and the second material layer is formed by a pure carbon material without impurities. Therefore, the structural strength and the ion transmission efficiency of the lithium battery with the cathode foil can be increased in virtue of the particle structures that are connected with each other. ## Claims ### Claim 1 A cathode foil for a lithium battery, comprising: a base material layer; a first material layer formed on the base material layer; and a second material layer including a plurality of particle structure groups disposed inside the first material layer, each of the particle structure groups including a plurality of particle structures connected with each other; wherein one of the first material layer and the second material layer is formed by a pure silicon material without impurities, and another one of the first material layer and the second material layer is formed by a pure carbon material without impurities. ### Claim 2 (depends on 1) The cathode foil of claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and both the first material layer and the second material layer are formed by co-sputtering or co-evaporating in a vacuum chamber, wherein at least one of the particle structures of the particle structure group contacts the base material layer, and at least another one of the particle structures of the particle structure group contacts an outer surface of the first material layer and is exposed out of the outer surface of the first material layer, wherein when the first material layer is formed by the pure silicon material without impurities and the second material layer is formed by the pure carbon material without impurities, the pure carbon material serves as the particle structures, and the pure silicon material serves as a cover material for enclosing the particle structures, wherein when the second material layer is formed by the pure silicon material without impurities and the first material layer is formed by the pure carbon material without impurities, the pure silicon material serves as the particle structures, and the pure carbon material serves as a cover material for enclosing the particle structures, and wherein in each of the particle structure groups, each of the particle structures is connected to the adjacent at least one of the particle structures to form a continuous stacked structure, so that the structural strength and the ion transmission efficiency of the cathode foil are increased in virtue of the continuous stacked structure. ### Claim 3 (depends on 1) The cathode foil of claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and both the first material layer and the second material layer are formed by co-sputtering or co-evaporating in a vacuum chamber, wherein at least one of the particle structures of the particle structure group contacts the base material layer, and the particle structures of the particle structure group are separated from an outer surface of the first material layer, wherein when the first material layer is formed by the pure silicon material without impurities and the second material layer is formed by the pure carbon material without impurities, the pure carbon material serves as the particle structures, and the pure silicon material serves as a cover material for enclosing the particle structures, wherein when the second material layer is formed by the pure silicon material without impurities and the first material layer is formed by the pure carbon material without impurities, the pure silicon material serves as the particle structures, and the pure carbon material serves as a cover material for enclosing the particle structures, and wherein in each of the particle structure groups, each of the particle structures is connected to the adjacent at least one of the particle structures to form a continuous stacked structure, so that the structural strength and the ion transmission efficiency of the cathode foil are increased in virtue of the continuous stacked structure. ### Claim 4 (depends on 1) The cathode foil of claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and both the first material layer and the second material layer are formed by co-sputtering or co-evaporating in a vacuum chamber, wherein the particle structures of the particle structure group are separated from the base material layer, and at least one of the particle structures of the particle structure group contacts an outer surface of the first material layer and is exposed out of the outer surface of the first material layer, wherein when the first material layer is formed by the pure silicon material without impurities and the second material layer is formed by the pure carbon material without impurities, the pure carbon material serves as the particle structures, and the pure silicon material serves as a cover material for enclosing the particle structures, wherein when the second material layer is formed by the pure silicon material without impurities and the first material layer is formed by the pure carbon material without impurities, the pure silicon material serves as the particle structures, and the pure carbon material serves as a cover material for enclosing the particle structures, and wherein in each of the particle structure groups, each of the particle structures is connected to the adjacent at least one of the particle structures to form a continuous stacked structure, so that the structural strength and the ion transmission efficiency of the cathode foil are increased in virtue of the continuous stacked structure. ### Claim 5 (depends on 1) The cathode foil of claim 1, wherein the base material layer is a Cu material layer or an Al material layer, and both the first material layer and the second material layer are formed by co-sputtering or co-evaporating in a vacuum chamber, wherein the particle structures of the particle structure group are separated from the base material layer, and the particle structures of the particle structure group are separated from an outer surface of the first material layer, wherein when the first material layer is formed by the pure silicon material without impurities and the second material layer is formed by the pure carbon material without impurities, the pure carbon material serves as the particle structures, and the pure silicon material serves as a cover material for enclosing the particle structures, wherein when the second material layer is formed by the pure silicon material without impurities and the first material layer is formed by the pure carbon material without impurities, the pure silicon material serves as the particle structures, and the pure carbon material serves as a cover material for enclosing the particle structures, and wherein in each of the particle structure groups, each of the particle structures is connected to the adjacent at least one of the particle structures to form a continuous stacked structure, so that the structural strength and the ion transmission efficiency of the cathode foil are increased in virtue of the continuous stacked structure. ### Claim 6 A lithium battery using a cathode foil, the lithium battery being one of a cylindrical lithium battery, a square lithium battery, a button lithium battery and a thin film lithium battery, characterized in that the cathode foil comprises: a base material layer; a first material layer formed on the base material layer; and a second material layer including a plurality of particle structure groups disposed inside the first material layer, each of the particle structure groups including a plurality of particle structures connected with each other; wherein one of the first material layer and the second material layer is formed by a pure silicon material without impurities, and another one of the first material layer and the second material layer is formed by a pure carbon material without impurities. ### Claim 7 (depends on 6) The lithium battery of claim 6, wherein at least one of the particle structures of the particle structure group contacts the base material layer, and at least another one of the particle structures of the particle structure group contacts an outer surface of the first material layer and is exposed out of the outer surface of the first material layer. ### Claim 8 (depends on 6) The lithium battery of claim 6, wherein at least one of the particle structures of the particle structure group contacts the base material layer, and the particle structures of the particle structure group are separated from an outer surface of the first material layer. ### Claim 9 (depends on 6) The lithium battery of claim 6, wherein the particle structures of the particle structure group are separated from the base material layer, and at least one of the particle structures of the particle structure group contacts an outer surface of the first material layer and is exposed out of the outer surface of the first material layer. ### Claim 10 (depends on 6) The lithium battery of claim 6, wherein the particle structures of the particle structure group are separated from the base material layer, and the particle structures of the particle structure group are separated from an outer surface of the first material layer.