Lithium secondary cell and method for manufacturing same

• US 6,964,829 B2
• Filed: 11/06/2001
• Issued: 11/15/2005
• Est. Priority Date: 11/06/2000
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Yamamoto, Hironori, Utsugi, Koji, Mori, Mitsuhiro, Iriyama, Jiro
• Primary Examiner(s): WEINER, LAURA S
• Application Number:
  US09/985,852
• Publication Number:
  US 20020086213A1
• Time in Patent Office: 1,470 Days
• Field of Search: 429/231.95, 429/233, 429/126, 296/235
• US Class Current: 429/231.95
• CPC Class Codes: H01M 10/05 Accumulators with non-aqueous electrolyte H01M10/39 takes precedence
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/382 Lithium H01M4/405 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A lithium secondary cell has, on a conductive substrate (collector) a lithium layer containing metallic lithium or an alloy thereof, and further has a metal fluoride substance film containing at least one type metal fluoride substance.

Claims

1. A lithium secondary cell comprising,

an anode formed on a conductive substrate and said anode comprising a lithium layer comprising either one of a metallic lithium and an alloy thereof, said anode further comprising a metal fluoride substance layer comprising at least one type metal fluoride,

wherein said lithium layer and said metal fluoride substance layer are formed by a vacuum film growth method, and

wherein said anode comprises a multilayered alternating laminated structure comprising said lithium layer and said metal fluoride substance layer being alternately laminated one on other.

2. A lithium secondary cell, comprising:

an anode formed on a conductive substrate and said anode comprising a lithium layer including therein either one of a metallic lithium and an alloy thereof, said anode further comprising a metal fluoride substance layer comprising at least one type metal fluoride,

said anode comprising a multilayered alternating laminated structure comprising said lithium layer and said metal fluoride substance layer being alternately laminated one on other.

3. A method for manufacturing an anode comprising forming an anode on a conductive substrate wherein said anode comprises forming by a vacuum film growth method a lithium layer comprising either one of a metallic lithium and an alloy thereof, and said anode further comprises forming by a vacuum film growth method a metal fluoride substance layer comprising at least one compound selected from the group consisting of lithium fluoride, magnesium fluoride, silver fluoride, aluminum fluoride, and calcium fluoride.

4. A lithium secondary cell, comprising:

an anode formed on a conductive substrate and said anode comprising a lithium layer comprising either one of a metallic lithium and an alloy thereof, said anode further comprising a metal fluoride substance layer comprising at least one type metal fluoride,

wherein said lithium layer has substantially no lithium hydroxide or lithium oxide film or the like on the surface thereof;

wherein said metal fluoride substance layer is in contact with said conductive substrate.

5. A lithium secondary cell, comprising:

an anode formed on a conductive substrate and said anode comprising a lithium layer comprising either one of a metallic lithium and an alloy thereof, said anode further comprising a metal fluoride substance layer comprising at least one type metal fluoride,

wherein said lithium layer has substantially no lithium hydroxide or lithium oxide film or the like on the surface thereof, and

wherein said anode comprises a multilayered alternating laminated structure comprising said lithium layer and said metal fluoride substance layer being alternately laminated one on other.

6. A lithium secondary cell, comprising:

an anode formed on a conductive substrate and said anode comprising a lithium layer including therein either one of a metallic lithium and an alloy thereof, said anode further comprising a metal fluoride substance layer comprising at least one type metal fluoride,

wherein said lithium layer has substantially no lithium hydroxide or lithium oxide film or the like on the surface thereof.

7. A lithium secondary cell according to claim 6, wherein a metal fluoride substance layer is provided on a surface of said anode.

8. A lithium secondary cell according to claim 6, wherein said metal fluoride substance comprises at least one selected from the group consisting of lithium fluoride, magnesium fluoride, silver fluoride, aluminum fluoride, and calcium fluoride.

9. A lithium secondary cell comprising,

an anode formed on a conductive substrate and said anode comprising a lithium layer including therein either one of a metallic lithium and an alloy thereof, said anode further comprising a metal fluoride substance layer comprising at least one type metal fluoride,

wherein said lithium layer and said metal fluoride substance layer are formed by a vacuum film growth method, and

wherein said metal fluoride substance layer is in contact with said conductive substrate.