Electrochemical devices and methods of fabrication

Patent metadata

Field	Value
Publication number	US-2016189884-A1
Application number	US-201514858415-A
Country	US
Kind code	A1
Filing date	Sep 18, 2015
Priority date	Mar 14, 2012
Publication date	Jun 30, 2016
Grant date	—

Abstract

The described invention provides a packaged electrochemical device comprising an electrochemical battery, further comprising at least one electrochemical cell stack and a barrier packaging material. The present invention further provides a method of fabricating the packaged electrochemical device. The present invention further provides a flexible multifunctional liquid-based thermogalvanic cell that converts and stores electricity derived from low grade temperature differentials that exist in ubiquitous scenarios.

First claim

What is claimed:

1 . An electrochemical device comprising an electrochemical cell, wherein the electrochemical cell further comprises
(i) an electrolyte comprising an ionic liquid; (ii) at least one electrochemical cell stack, comprising: (1) a first layer containing a positive electrode; (2) a second layer containing a porous separator; (3) a third layer containing a negative electrode; and (iii) a barrier packaging material comprising at least one conformal barrier coating layer deposited at a pressure of less than 1 atm.

2 . The electrochemical device according to claim 1 , wherein the second layer containing the porous separator is bonded between the first layer containing the positive electrode and the third layer containing the negative electrode.

3 . The electrochemical device according to claim 1 , wherein the barrier packaging material is conformally deposited over each surface of each side of the electrochemical cell stack.

4 . The electrochemical device according to claim 1 , wherein the ionic liquid further comprises a dissolved salt.

5 . The electrochemical device according to claim 1 , wherein the electrolyte further comprises a cosolvent that has a vapor pressure <10 −1 torr.

6 . The electrochemical device according to claim 1 , wherein the at least one electrochemical cell stack further comprises a positive current collector associated with the positive electrode.

7 . The electrochemical device according to claim 1 , wherein the at least one electrochemical cell stack further comprises a negative current collector associated with the negative electrode.

8 . The electrochemical device according to claim 1 , the at least one electrochemical cell stack is a bonded microporous electrochemical cell stack that has the ability to store the ionic liquid within its pores.

9 . The electrochemical device according to claim 1 , wherein the positive electrode and the negative electrode comprises an electrode composition within the electrochemical stability of water.

10 . The electrochemical device according to claim 1 , wherein the battery cell is a fluoride battery cell.

11 . The electrochemical device according to claim 1 , wherein each conformal barrier coating layer is deposited onto the electrochemical battery at a pressure less than one atmospheric pressure.

12 . The electrochemical device according to claim 1 , wherein each conformal barrier coating layer contains at least one para-xylylene polymer variant.

13 . The electrochemical device according to claim 12 , wherein the at least one parylene (paraxylylene polymer) variant is Parylene-C® (para-chloroxylylene).

14 . The electrochemical device according to claim 11 , wherein each conformal barrier coating layer contains a barrier agent.

15 . The electrochemical device according to claim 14 , wherein the barrier agent is a hermetic agent.

16 . The electrochemical device according to claim 1 , wherein the barrier packaging material comprises alternating layers of a conformal barrier coating layer containing at least one para-xylylene polymer variant and a conformal barrier coating layer comprising a barrier agent.

17 . The electrochemical device according to claim 15 , wherein the hermetic agent is a metal or metal oxide.

18 . The electrochemical device according to claim 1 , wherein each electrode is optionally associated with a current collector.

19 . The electrochemical device according to claim 1 , wherein each electrochemical cell stack comprises a plurality of electrochemical cells connected in parallel within the packaged electrochemical device.

20 . The electrochemical device according to claim 1 , wherein each electrochemical cell stack comprises a plurality of electrochemical cells connected in series within the packaged electrochemical device.

Assignees

• Univ Rutgers

Inventors

• Amatucci Glenn G
• Plitz Irene
• Halajko Anna B
• Sung Linda Wu

Classifications

• H01M50/191

  Inorganic material · CPC title

• H01M50/121

  Organic material · CPC title

• H01G9/035

  Liquid electrolytes, e.g. impregnating materials (H01G11/54 takes precedence) · CPC title

• H01G11/80 Primary

  Gaskets; Sealings · CPC title

• H01G11/22

  Electrodes · CPC title