# US 5,702,845 A · Secondary battery using lithium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,702,845 A - Document ID: US5702845A - Status: Granted - Kind: A - Application number: 08/615,599 - Filed: 1996-03-13 - Granted: 1997-12-30 - Earliest claimed: 1995-03-17 - Assignees: Canon Kabushiki Kaisha - Inventors: Soichiro Kawakami; Naoya Kobayashi - Web page: https://patentgrep.com/patent/US5702845A ## CPC - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - H01M 4/134: Electrodes based on metals, Si or alloys - H01M 10/05: Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) - H01M 10/052: Li-accumulators - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - Y02E 60/10: Energy storage using batteries - 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 ## Abstract The present invention is directed to provide a secondary battery using lithium which includes at least a negative electrode, a positive electrode, a separator provided between said negative electrodes and said positive electrode, and an electrolyte, wherein at least either of said negative electrode or said positive includes an active material having porous hollow structure as a host for intercalating/deintercalating guest lithium ion. The secondary battery shows high electric capacity, high charging/discharging efficiency, high energy density, and long cycle life. ## Claims ### Claim 1 A secondary battery using lithium comprising at least a negative electrode, a positive electrode, a separator provided between said negative electrode and said positive electrode, and an electrolyte, wherein at least either of said negative electrode or said positive electrode comprises an active material having a porous hollow structure, wherein said porous hollow structure comprises an outer shell surrounding a hollow core section and a plurality of pores each extending completely through said shell to communicate with said hollow core section. ### Claim 2 (depends on 1) A secondary battery using lithium according to claim 1, wherein said active material acts as a host intercalating or deintercalating lithium ions as guests. ### Claim 3 (depends on 1) A secondary battery using lithium according to claim 1, wherein said active material having porous hollow structure for the positive electrode comprises at least a metal oxide. ### Claim 4 (depends on 1) A secondary battery using lithium according to claim 1, wherein said active material having porous hollow structure for said negative electrode or said positive electrode is provided with a conductive material in the hollow core section. ### Claim 5 (depends on 1) A secondary battery using lithium according to claim 1, wherein said active material having porous structure for said negative electrode is selected from the group consisting of a carbonaceous material, metal, metal oxide and a composite material thereof. ### Claim 6 (depends on 1) A secondary battery using lithium according to claim 1, wherein said active material for said negative electrode is a carbonaceous material, and contains at least one element selected from the group consisting of Group IIIB elements, Group IVB elements, Group VB elements, Group VIB elements, and Group VIIB elements in the periodic table of the elements. ### Claim 7 (depends on 6) A secondary battery using lithium according to claim 6, wherein said Group IIIB element contained in said carbonaceous active material for said negative electrode is boron. ### Claim 8 (depends on 6) A secondary battery using lithium according to claim 6, wherein said Group VB element contained in said carbonaceous active material for said negative electrode is at least one element selected from nitrogen and phosphorus. ### Claim 9 (depends on 6) A secondary battery using lithium according to claim 6, wherein said Group IVB element contained in said carbonaceous active material for said negative electrode is silicon. ### Claim 10 (depends on 6) A secondary battery using lithium according to claim 6, wherein said Group VIB element contained in said carbonaceous active material for said negative electrode is at least one element selected from oxygen and sulfur. ### Claim 11 (depends on 6) A secondary battery using lithium according to claim 6, wherein said Group VIIB element contained in said carbonaceous active material for said negative electrode is at least one element selected from fluorine and chlorine. ### Claim 12 (depends on 1) A secondary battery using lithium according to claim 1, wherein said battery further comprises a housing for storing said negative electrode, said positive electrode, said separator, and said electrolyte. ### Claim 13 (depends on 1) A secondary battery using lithium according to claim 1, wherein said negative electrode comprises an active material layer retaining said active material, and a collector. ### Claim 14 (depends on 1) A secondary battery using lithium according to claim 1, wherein said positive electrode comprises an active material layer retaining said active material, and a collector.