A battery system

Patent metadata

Field	Value
Publication number	US-2017237106-A1
Application number	US-201515503563-A
Country	US
Kind code	A1
Filing date	Aug 17, 2015
Priority date	Aug 15, 2014
Publication date	Aug 17, 2017
Grant date	—

Abstract

The present invention relates to batteries and more particularly to battery systems. More particularly, the present invention relates to metal-air based battery systems. In an aspect of the present invention, there is provided a battery system, the system comprising (a) a cell comprising a metal anode and a cathode current collector, the metal anode and the cathode current collector separated by a separator; (d) a gas diffusion tank; and (e) an electrolyte between the cathode current collector and the gas diffusion tank, the electrolyte comprising redox molecules.

First claim

1 . A battery system, the system comprising:
(a) a cell comprising a metal anode and a cathode current collector, the metal anode and the cathode current collector separated by a separator; (b) a gas diffusion tank; and (c) an electrolyte between the cathode current collector and the gas diffusion tank, the electrolyte comprising redox molecules.

2 . The system according to claim 1 , wherein the redox molecules may be any molecule selected from the group comprising: a quinone derivative, an aromatic amine derivatives, a phenazine derivatives, a phenothiazine derivatives and quinoxaline.

3 . The system according to claim 1 , wherein the concentration of the redox molecules in the electrolyte is about 5 mM to 5M.

4 . The system according to claim 1 , wherein the separator selectively allows the passage of metal ions only.

5 . The system according to claim 1 , wherein the separator is any one selected from the group comprising: a lithiated Nafion or its composite membrane, and a lithium ion conductive ceramic membrane.

6 . The system according to claim 1 , wherein the metal in the metal anode is any metal selected from the group comprising: lithium, potassium, calcium, aluminium, zinc and magnesium.

7 . The system according to claim 6 , wherein the lithium metal electrode is a vinylene carbonate pre-treated lithium foil.

8 . The system according to claim 7 , wherein the lithium metal electrode further comprises a PVDF-Nafion composite membrane.

9 . The system according to claim 1 , wherein the cathode current collector comprises a porous conducting matrix.

10 . The system according to claim 9 , wherein the porous substrate is carbon felt.

11 . The system according to claim 1 , further comprising a pump to pump the electrolyte fluid between the cathode current collector and the tank.

12 . The system according to claim 11 , wherein the pump is a peristaltic pump.

13 . The system according to claim 1 , wherein the gas in the gas diffusion tank is oxygen and the pressure of oxygen in the gas diffusion tank is 1 atmosphere.

Assignees

• Nat Univ Singapore

Inventors

• Wang Qing
• Zhu Yunguang

Classifications

• H01M50/497

  Ionic conductivity · CPC title

• H01M50/426

  Fluorocarbon polymers · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M12/08

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M8/04276

  Arrangements for managing the electrolyte stream, e.g. heat exchange · CPC title