Energy storage devices

• US 8,273,475 B2
• Filed: 12/09/2008
• Issued: 09/25/2012
• Est. Priority Date: 09/23/2008
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Tsai, Li-Duan, Li, Chun-Lung, Hwang, Jenn-Yeu
• Primary Examiner(s): Kalafut, Stephen J.
• Application Number:
  US12/331,338
• Publication Number:
  US 20100075223A1
• Time in Patent Office: 1,386 Days
• Field of Search: 429/137, 429/213
• US Class Current: 429/137
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/1393 of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/622 being polymers
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An energy storage device is provided. The energy storage device includes a positive electrode, a negative electrode covered by a protective layer, and an electrolyte. The positive electrode includes fast-energy-storage electrochemical capacitive materials coated on a current collector. The negative electrode includes metal materials capable of having electrochemical reactivity toward lithium ion. The protective layer includes oxides or hydroxides of the metal materials.

Claims

1. An energy storage device, comprising:

a positive electrode;

an aluminum negative electrode;

a protective layer of aluminum oxide or aluminum hydroxide formed on a surface of the aluminum negative electrode; and

an electrolyte.

2. The energy storage device as claimed in claim 1, wherein the positive electrode comprises fast-energy-storage electrochemical capacitive materials coated on a current collector.

3. The energy storage device as claimed in claim 2, wherein the fast-energy-storage electrochemical capacitive materials comprise activated carbon, conductive polymers or combinations thereof.

4. The energy storage device as claimed in claim 3, wherein the conductive polymers comprise poly(3-methylthiophene) (PMeT) or poly(3,4-ethylenedioxythiophene) (PEDOT).

5. The energy storage device as claimed in claim 2, wherein the current collector comprises aluminum.

6. The energy storage device as claimed in claim 1, wherein the electrolyte comprises lithium salts.

7. The energy storage device as claimed in claim 1, wherein the aluminum negative electrode is an aluminum foil arranged to serve as a current collector.