Electrode slurry, slurry electrode, flow battery and stack

Patent metadata

Field	Value
Publication number	US-2019252677-A1
Application number	US-201816196347-A
Country	US
Kind code	A1
Filing date	Nov 20, 2018
Priority date	Feb 9, 2018
Publication date	Aug 15, 2019
Grant date	—

Abstract

A flow battery field, an electrode slurry, a slurry electrode, a flow battery, and a stack are disclosed. The electrode slurry comprising electrode particles and electrolyte that contains active substance. Based on 100 pbw active substance, the electrode particles are 10-1,000 pbw. The slurry electrode comprises: a bipolar plate, a current collector, and a slurry electrode reservoir configured to store electrode slurry. In the two opposite sides of the bipolar plate, one side is adjacent to the current collector, and the other side is arranged with a slurry electrode cavity, and flow channels are arranged and extended between the bipolar plate and the slurry electrode cavity, so that the electrode slurry is circulated between the slurry electrode cavity and the slurry electrode reservoir. A flow battery that employs the electrode slurry can provide higher and more stable power output under the same current condition and is lower in cost.

First claim

What is claimed is:

1 . An electrode slurry, comprising electrode particles and electrolyte that contains active substance, wherein based on 100 pbw active substance, the electrode particles are 10-1,000 pbw.

2 . The electrode slurry according to claim 1 , wherein based on 100 pbw active substance, the electrode particles are 50-800 pbw.

3 . The electrode slurry according to claim 1 , wherein based on 100 pbw active substance, the electrode particles are 200-500 pbw.

4 . The electrode slurry according to claim 1 , wherein the active substance is selected from at least one of metal halides.

5 . The electrode slurry according to claim 4 , wherein the active substance is at least one of metal chlorides and metal bromides.

6 . The electrode slurry according to claim 4 , wherein the active substance is at least one of aluminum chloride, aluminum bromide, ferric chloride, ferrous chloride, ferric bromide, chromium chloride, titanium chloride, cupric chloride, nickel chloride, cobaltous chloride, and zinc chloride.

7 . The electrode slurry according to claim 1 , wherein in the electrolyte, the concentration of the active substance is 0.1-15 mol/L;
the electrolyte further contains solvent, which is at least one of water, methanol, ethanol, ether, acetone, and acetic acid.

8 . The electrode slurry according to claim 1 , wherein the electrolyte further contains supporting electrolyte, which is at least one of ethylene carbonate, propylene carbonate, diethyl carbonate, dimethyl carbonate, ethyl methyl carbonate, lithium hexafluorophosphate, sulfuric acid, hydrochloric acid, nitric acid, sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, sodium hydroxide, and potassium hydroxide;
the concentration of the supporting electrolyte is 0.1-10 mol/L.

9 . The electrode slurry according to claim 1 , wherein the electrode particles are at least one of graphite, carbon powder, silicon, and molybdenum disulfide; the average particle diameter of the electrode particles is 0.01-200 μm.

10 . The electrode slurry according to claim 9 , wherein the electrode particles are graphite; the average particle diameter of the electrode particles is 1-100 μm.

11 . A slurry electrode, comprising:
A bipolar plate ( 1 ), a current collector ( 2 ), and a slurry electrode reservoir ( 4 ) configured to store electrode slurry; wherein, with regard to the two opposite sides of the bipolar plate ( 1 ), one side is adjacent to the current collector ( 2 ), and the other side is arranged with a slurry electrode cavity ( 5 ) that is open on one side, and the open side of the slurry electrode cavity ( 5 ) is covered with an ion exchange membrane ( 6 ); an electrode slurry inlet flow channel ( 7 ) and an electrode slurry outlet flow channel ( 8 ) are arranged and extended between the bipolar plate ( 1 ) and the slurry electrode cavity ( 5 ), the electrode slurry inlet flow channel ( 7 ) is connected with an outlet of the slurry electrode reservoir ( 4 ), and the electrode slurry outlet flow channel ( 8 ) is connected with an inlet of the slurry electrode reservoir ( 4 ), so that the electrode slurry is circulated between the slurry electrode cavity ( 5 ) and the slurry electrode reservoir ( 4 ); the electrode slurry is the electrode slurry recited in claim 1 .

12 . The slurry electrode according to claim 11 , wherein the depth H of the slurry electrode cavity ( 5 ) is 0.1-10 mm;
the volume of the slurry electrode cavity ( 5 ) is 5-90% of the volume of the bipolar plate ( 1 ).

13 . The slurry electrode according to claim 11 , wherein the depth H of the slurry electrode cavity ( 5 ) is 0.5-5 mm;
the volume of the slurry electrode cavity ( 5 ) is 10-50% of the volume of the bipolar plate ( 1 ).

14 . The slurry electrode according to claim 11 , wherein the slurry electrode cavity ( 5 ) is arranged with fluid channel ( 9 ), which is serpentine-shaped flow channel, interdigitated flow channel, or parallel flow channels.

15 . The slurry electrode according to claim 11 , wherein the slurry electrode cavity ( 5 ) is arranged with at least one baffle plate ( 10 ), and if two or more baffle plates ( 10 ), they are spaced from each other.

16 . The slurry electrode according to claim 11 , wherein angle between the extension direction of the electrode slurry inlet flow channel ( 7 ) and the horizontal direction is 0°-90°; and
angle between the extension direction of the electrode slurry outlet flow channel ( 8 ) and the horizontal direction is 0°-90°.

17 . The slurry electrode according to claim 11 , wherein angle between the extension direction of the electrode slurry inlet flow channel ( 7 ) and the horizontal direction is 45°-90°; and
angle between the extension direction of the electrode slurry outlet flow channel ( 8 ) and the horizontal direction is 45°-90°.

18 . A flow battery, comprising a slurry electrode, an opposite electrode, and a membrane ( 3 ) put between the slurry electrode and the opposite electrode, wherein the slurry electrode is the slurry electrode recited in any of claim 11 .

19 . The flow battery according to the claim 18 , wherein the opposite electrode comprises a porous electrode ( 21 ), an opposite bipolar plate ( 22 ), an opposite current collector ( 23 ), and an electrolyte reservoir ( 24 ) configured to store opposite electrolyte that contains opposite active substance;
the porous electrode ( 21 ) is adjacent to the opposite bipolar plate ( 22 ), and the opposite bipolar plate ( 22 ) is adjacent to the opposite current collector ( 23 ); and the opposite bipolar plate ( 22 ) is arranged with electrolyte flow channels, so that the opposite electrolyte is in contact with the porous electrode ( 21 ).

20 . A stack, comprising the flow battery recited in the claim 18 .

Assignees

• China Energy Investment Corp Ltd
• Nat Inst Clean & Low Carbon Energy

Inventors

• Liu Qinghua
• Lemmon John P
• Wei Chang
• Xu Wenqiang
• Li Yonglong
• Liang Wenbin

Classifications

• H01M8/188 Primary

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• H01M8/2455

  with liquid, solid or electrolyte-charged reactants · CPC title

• H01M8/0293

  Matrices for immobilising electrolyte solutions · CPC title

• H01M8/0258

  characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant · CPC title

• H01M2300/0002

  Aqueous electrolytes · CPC title