Battery electrode binder

Patent metadata

Field	Value
Publication number	US-2019229336-A1
Application number	US-201716327247-A
Country	US
Kind code	A1
Filing date	Aug 30, 2017
Priority date	Aug 30, 2016
Publication date	Jul 25, 2019
Grant date	—

Abstract

There is provided a battery electrode binder comprising an aqueous composition of at least one component selected from the group consisting of azadirachta indica, triticum aestivum, glue and moringa oleifera. There is also provided a battery electrode comprising the battery electrode binder, a method of preparing the battery electrode comprising the battery electrode binder, and a battery comprising the battery electrode.

First claim

1 . A battery electrode binder comprising an aqueous composition of at least one component selected from the group consisting of azadirachta indica, triticum aestivum, glue and moringa oleifera.

2 . The battery electrode binder according to claim 1 , wherein the azadirachta indica is a bark extract of azadirachta indica and/or the moringa oleifera is a bark extract of moringa oleifera.

3 . The battery electrode binder according to claim 1 , wherein the aqueous composition comprises:
(i) azadirachta indica and triticum aestivum; (ii) triticum aestivum and glue; (iii) azadirachta indica and glue; (iv) glue and moringa oleifera; (v) azadirachta indica and moringa oleifera; (vi) azadirachta indica, glue and moringa oleifera; or (vii) glue.

4 . The battery electrode binder according to claim 1 , wherein a weight ratio of the components to water comprised in the aqueous composition is 1:1-1:20.

5 . A battery electrode comprising the binder according to claim 1 , and an electrode active material.

6 . The battery electrode according to claim 5 , wherein the electrode active material is selected from:
(a) Li + -containing compounds, transition metal oxides, carbon-based materials, lithium metal or a combination thereof, when the battery is a lithium ion battery; or (b) Na + -containing compounds, transition metal oxides, carbon-based materials, sodium metal or a combination thereof, when the battery is a sodium ion battery.

7 . The battery electrode according to claim 5 , further comprising a conductive material.

8 . The battery electrode according to claim 5 , wherein the battery electrode is comprised in a battery.

9 . A method of preparing a battery electrode comprising:
a. mixing the battery electrode binder of claim 1 with an electrode active material to form an electrode coating composition; and b. coating the electrode coating composition on a current collector to form the battery electrode.

10 . The method according to claim 9 , wherein the battery electrode binder is formed by dissolving water with the at least one component selected from the group consisting of azadirachta indica, triticum aestivum, glue and moringa oleifera, wherein the water is at a temperature of 25-90° C.

11 . The method according to claim 9 , wherein the electrode active material is selected from:
(a) Li + -containing compounds, transition metal oxides, carbon-based materials, lithium metal or a combination thereof, when the battery is a lithium ion battery; or (b) Na + -containing compounds, transition metal oxides, carbon-based materials, sodium metal or a combination thereof, when the battery is a sodium ion battery.

12 . The method according to claim 9 , wherein the mixing further comprises mixing a conductive material.

13 . The method according to claim 9 , wherein the mixing comprises stirring for a pre-determined period of time to form a homogeneous electrode coating composition.

14 . The method according to claim 13 , wherein the pre-determined period of time is 0.1-12 hours.

15 . The method according to claim 9 , wherein the method further comprises drying the battery electrode following the coating.

16 . The method according to claim 15 , wherein the drying comprises drying the battery electrode in a vacuum chamber or inert gas atmosphere.

Assignees

• Nat Univ Singapore

Inventors

• Palani Balaya
• Hariharan Srirama
• Kwok Cheow Wai Clement
• Gajjela Satyanarayana Reddy

Classifications

• H01M4/139

  Processes of manufacture · CPC title

• H01M4/621 Primary

  Binders · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• H01G11/38

  Carbon pastes or blends; Binders or additives therein · CPC title