Hybrid electrochemical cell

Patent metadata

Field	Value
Publication number	US-2023282908-A1
Application number	US-202217984310-A
Country	US
Kind code	A1
Filing date	Nov 10, 2022
Priority date	Jun 16, 2014
Publication date	Sep 7, 2023
Grant date	—

Abstract

Disclosed is a hybrid electrochemical cell with a first conductor having at least one portion that is both a first capacitor electrode and a first battery electrode. The hybrid electrochemical cell further includes a second conductor having at least one portion that is a second capacitor electrode and at least one other portion that is a second battery electrode. An electrolyte is in contact with both the first conductor and the second conductor. In some embodiments, the hybrid electrochemical cell further includes a separator between the first conductor and the second conductor to prevent physical contact between the first conductor and the second conductor, while facilitating ion transport between the first conductor and the second conductor.

First claim

What is claimed is:

1 . An electrode comprising:
a. at least one portion that is a battery electrode; b. at least one portion that is a capacitor electrode; c. a ratio between the capacitor electrode and the battery electrode that is from about 1:10 to about 10:1; and d. graphene formed in an intercorrugated carbon-based network (ICCN).

2 . The electrode of claim 1 , wherein the electrode comprises an active material deposited on the electrode.

3 . The electrode of claim 2 , wherein the ICCN comprises the active material in a conformal coating throughout a three-dimensional (3D) structure of the ICCN.

4 . The electrode of claim 3 , wherein the active material comprises metal oxide particles.

5 . The electrode of claim 4 , wherein the metal oxide particles comprise niobium pentoxide (Nb 2 O 5 ), lanthanum nickel (LaNi 5 ), cadmium hydroxide (Cd(OH) 2 ), or palladium (Pd).

6 . The electrode of claim 1 , wherein the capacitor electrode comprises activated carbon.

7 . The electrode of claim 3 , wherein the capacitor electrode comprises ICCN.

8 . The electrode of claim 3 , wherein a thickness of the ICCN as measured from cross-sectional scanning electron microscopy (SEM) and profilometry ranges from about 5 μm to about 100 μm.

9 . The electrode of claim 1 , wherein the ratio between the capacitor electrode and the battery electrode is 1:1.

10 . The electrode of claim 1 , wherein the ratio between the capacitor electrode and the battery electrode is 2:9, 3:8, 4:7, or 5:6.

11 . The electrode of claim 1 , wherein the ratio between the capacitor electrode and the battery electrode is 6:5, 7:4, 8:3, or 9:2.

12 . The electrode of claim 1 , wherein the electrode is configured to function in an electrochemical cell comprising Ni—Cd or Ni-MH chemistry.

13 . The electrode of claim 1 , wherein the electrode is configured to function in an electrochemical cell comprising lithium ion chemistry.

14 . The electrode of claim 1 , wherein the electrode is a microelectrode.

15 . The electrode of claim 2 , wherein the electrode stores charge via adsorption of ions on a surface the electrode.

Assignees

• Univ California

Inventors

• El-Kady Maher F
• Kaner Richard B

Classifications

• H01G11/46

  Metal oxides · CPC title

• H01G11/32

  Carbon-based · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · 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