Electrochemical energy storage device

Patent metadata

Field	Value
Publication number	US-2025357528-A1
Application number	US-202519210334-A
Country	US
Kind code	A1
Filing date	May 16, 2025
Priority date	May 17, 2024
Publication date	Nov 20, 2025
Grant date	—

Abstract

The present invention provides an electrochemical energy storage device comprising: a cathode, which generates a first metal ion that substantially participates in an electrochemical reaction during the operation of the device; an electrolyte, which generates at least one second metal ion that substantially participates in the electrochemical reaction, wherein the second metal ion is different from the first metal ion and has a reduction potential/nucleation charge higher than that of the first metal ion; and an anode that includes at least one current collector foil. The present invention proposes combining two or more heterogeneous metal ions with differing reduction potentials/nucleation charges within the same electrochemical system, utilizing the ion with the lowest reduction potential/nucleation charge to define the reaction window, thereby achieving a novel electrochemical energy storage device involving dual or multiple ion participation.

First claim

What is claimed is:

1 . An electrochemical energy storage device, comprising:
a cathode, which generates a first metal ion that substantially participates in an electrochemical reaction during the operation; an electrolyte, which generates at least one second metal ion that substantially participates in the electrochemical reaction, wherein the second metal ion is different from the first metal ion and has a reduction potential/nucleation potential higher than that of the first metal ion; and an anode comprising at least one current collector foil.

2 . The electrochemical energy storage device of claim 1 , wherein the electrolyte also generates the first metal ion that substantially participates in the electrochemical reaction.

3 . The electrochemical energy storage device of claim 1 , wherein the first metal ion or the second metal ion comprises lithium (Li), sodium (Na), calcium (Ca), potassium (K), magnesium (Mg), barium (Ba), strontium (Sr), aluminum (Al), zinc (Zn), nickel (Ni), or iron (Fe).

4 . The electrochemical energy storage device of claim 1 , wherein the electrolyte further comprises one or more heterogeneous metal ions in addition to the second metal ion, each having a reduction potential/nucleation potential higher than that of the first metal ion.

5 . The electrochemical energy storage device of claim 2 , wherein the electrolyte further comprises one or more heterogeneous metal ions in addition to the second metal ion, each having a reduction potential/nucleation potential higher than that of the first metal ion.

6 . The electrochemical energy storage device of claim 1 , wherein the current collector foil of the anode comprises copper foil, aluminum foil, or stainless steel foil.

7 . The electrochemical energy storage device of claim 2 , wherein the current collector foil of the anode comprises copper foil, aluminum foil, or stainless steel foil.

8 . The electrochemical energy storage device of claim 1 , wherein the charge/discharge voltage or potential of the device is controlled to be lower than the reduction potential of the first metal ion and higher than that of the second metal ion, or equal to the reduction potential of the first metal ion.

9 . The electrochemical energy storage device of claim 2 , wherein the charge/discharge voltage or potential of the device is controlled to be lower than the reduction potential of the first metal ion and higher than that of the second metal ion, or equal to the reduction potential of the first metal ion.

10 . The electrochemical energy storage device of claim 1 , wherein the cathode comprises a positive electrode material selected from lithium manganese oxide, lithium iron phosphate, lithium nickel cobalt manganese oxide, or lithium cobalt oxide.

11 . The electrochemical energy storage device of claim 2 , wherein the cathode comprises a positive electrode material selected from lithium manganese oxide, lithium iron phosphate, lithium nickel cobalt manganese oxide, or lithium cobalt oxide.

12 . The electrochemical energy storage device of claim 1 , wherein the anode comprises a negative electrode material selected from carbon-based or non-carbon-based negative electrode materials.

13 . The electrochemical energy storage device of claim 2 , wherein the anode comprises a negative electrode material selected from carbon-based or non-carbon-based negative electrode materials.

Assignees

• Univ Nat Taiwan Science & Technology

Inventors

• Hwang Bing-Joe
• Su Hsuan-Hsuan
• Yang Sheng-Chiang
• Huang Yu-Chun
• Su Wei-Nien

Classifications

• H01M4/381

  Alkaline or alkaline earth metals elements (H01M4/40 takes precedence) · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title