Capacitor-assisted electrochemical devices having hybrid structures

Patent metadata

Field	Value
Publication number	US-2021135224-A1
Application number	US-202017084782-A
Country	US
Kind code	A1
Filing date	Oct 30, 2020
Priority date	Nov 1, 2019
Publication date	May 6, 2021
Grant date	—

Abstract

A hybrid electrochemical device including at least two electrically connected solid-state electrochemical cells is provided. Each electrochemical cell includes a first outer electrode having a first current collector and a first electroactive layer, a second outer electrode having a second current collector and a second electroactive layer, and one or more intervening electrodes disposed between the electroactive layers. At least one of the intervening electrodes includes one or more capacitor additives. The first outer electrode is electrically connected to at least one of the intervening electrodes in a first electrical configuration. The second outer electrode is electrically connected to at least one of the intervening electrodes in a second electrical configuration. The at least two electrochemical cells are electrically connected in a third electrical configuration. The first and second electrical configurations are the same and the third electrical configuration is distinct from the first and second electrical configurations.

First claim

What is claimed is:

1 . A hybrid electrochemical device comprising:
at least two electrically connected solid-state electrochemical cells, wherein each solid-state electrochemical cell comprises:
a first outer electrode comprising a first current collector and a first electroactive layer disposed on or adjacent a first surface of the first current collector;
a second outer electrode comprising a second current collector and a second electroactive layer disposed on or adjacent a first surface of the second current collector; and
one or more intervening electrodes disposed between the first and second electroactive layers, wherein at least one of the intervening electrodes comprises one or more capacitor additives,
wherein the first outer electrode is electrically connected to at least one of the intervening electrodes in a first electrical configuration selected from series or parallel, the second outer electrode is electrically connected to at least one of the intervening electrodes in a second electrical configuration selected from series or parallel, and the at least two electrochemical cells are electrically connected in a third electrical configuration selected from series or parallel, wherein the first and second electrical configurations are the same and the third electrical configuration is distinct from the first and second electrical configurations.

2 . The hybrid electrochemical device of claim 1 , wherein the first and second electrical configurations are series configurations and the third electrical configuration is a parallel configuration.

3 . The hybrid electrochemical device of claim 2 , wherein the one or more intervening electrodes are bipolar electrodes and each of the bipolar electrodes comprises:
a bipolar current collector having a first surface opposing a second surface; a positive electroactive layer disposed on or adjacent the first surface of the bipolar current collector; and a negative electroactive layer disposed on or adjacent the second surface of the bipolar current collector.

4 . The hybrid electrochemical device of claim 3 , wherein one of the positive electroactive layer and the negative electroactive layer of at least a first bipolar electrode comprises the one or more capacitor additives.

5 . The hybrid electrochemical device of claim 3 , wherein one of the positive electroactive layer and the negative electroactive layer of at least a first bipolar electrode is a capacitor layer consisting essentially of the one or more capacitor additives.

6 . The hybrid electrochemical device of claim 5 , wherein greater than or equal to about 1 to less than or equal to about n−1 of the intervening electrodes includes the one or more capacitor additives, where n is a total number of intervening electrodes in the solid-state electrochemical cell.

7 . The hybrid electrochemical device of claim 1 , wherein one of the first and second electroactive layers includes the one or more capacitor additives.

8 . The hybrid electrochemical device of claim 1 , wherein the first and second electrical configurations are parallel configurations and the third electrical configuration is a series configuration.

9 . The hybrid electrochemical device of claim 1 , wherein the one or more intervening electrodes are monopolar electrodes, wherein each monopolar electrode comprises:
a third current collector having a first surface that opposes a second surface; a third electroactive layer disposed on or adjacent the first surface of the third current collector; and a fourth electroactive layer disposed on or adjacent the second surface of the third current collector.

10 . The hybrid electrochemical device of claim 9 , wherein one of the second and third electroactive layers includes the one or more capacitor additives.

11 . The hybrid electrochemical device of claim 9 , wherein one of the second and third electroactive layers consisting essentially of the one or more capacitor additives, and wherein greater than or equal to about 1 to less than or equal to about n−1 of the intervening electrodes includes the one or more capacitor additives, where n is a total number of intervening electrodes in the solid-state electrochemical cell.

12 . The hybrid electrochemical device of claim 1 , wherein a solid-state electrolyte is disposed between each of the positive outer electrode, the one or more intervening electrodes, and the negative outer electrode.

13 . A hybrid electrochemical device comprising:
at least two solid-state electrochemical cells, wherein the at least two solid-state electrochemical cells are electrically connected in series and wherein each of the at least two solid-state electrochemical cells comprises:
a positive outer electrode comprising a first positive current collector and a first positive electroactive layer disposed on or adjacent a first surface of the first positive current collector;
a negative outer electrode comprising a first negative current collector and a first negative electroactive layer disposed on or adjacent a first surface of the first negative current collector;
at least one positive monopolar electrode disposed between the first positive electroactive layer and the first negative electroactive layer, wherein the at least one positive monopolar electrode is electrically connected to the positive outer electrode in parallel; and
at least one negative monopolar electrode disposed with the at least one monopolar positive electrode between the first positive electroactive layer and the first negative electroactive layer, wherein the at least one negative monopolar electrode is electrically connected to the negative outer electrode in parallel, and wherein one of the at least one monopolar positive electrode and the at least one monopolar negative electrode comprises a capacitor additive.

14 . The hybrid electrochemical device of claim 13 , wherein each of the positive monopolar electrodes comprises:
a second positive current collector having a first surface that opposes a second surface; a second positive electroactive layer disposed on the first surface of the second positive current collector; and a third positive electroactive layer disposed on the second surface of the second positive current collector; and each of the negative monopolar electrodes comprises:
a second negative current collector having a first surface that opposes a second surface;
a second negative electroactive layer disposed on or adjacent the first surface of the second negative current collector; and
a third negative electroactive layer disposed on or adjacent the second surface of the second positive current collector.

15 . The hybrid electrochemical device of claim 14 , wherein the one of the second positive electroactive layer, the second negative electroactive layer, the third positive electroactive layer, and the third negative electroactive layer comprises the capacitor additive.

16 . The hybrid electrochemical device of claim 14 , wherein the one of the second positive electroactive layer, the second negative electroactive layer, the third positive electroactive layer, and the third negative electroactive layer is a capacitor layer consisting essentially of the capacitor additive.

17 . A hybrid electrochemical device comprising:
at least two solid-state electrochemical cells, wherein the at least two solid-state electrochemical cells are electrically connected in parallel and wherein each of the at least two solid-state electrochemical cells comprises:
a positive outer electrode comprising a first positive c

Assignees

• Gm Global Tech Operations Llc

Inventors

• Hou Mengyan
• Liu Haijing
• Su Qili
• Que Xiaochao

Classifications

• H01M50/531

  Electrode connections inside a battery casing · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01M2300/0065

  Solid electrolytes · CPC title

• H01M2004/029

  Bipolar electrodes · CPC title