Compositions for preparing expander free electrodes for lead acid battery and performance thereof

Patent metadata

Field	Value
Publication number	US-2018337397-A1
Application number	US-201815919082-A
Country	US
Kind code	A1
Filing date	Mar 12, 2018
Priority date	May 17, 2017
Publication date	Nov 22, 2018
Grant date	—

Abstract

The present invention deals with employing Heteroatoms namely Nitrogen, Sulphur intrinsic embedded carbon nanotubes (H-CNT) as multifunctional additive for preparing lead acid battery electrodes to substitute the expander chemicals namely, Vanisperse, Dinel Fibre, Barium sulphate and carbon black. Further the invention provides H-CNT in-situ produced from Crude oil or its products.

First claim

1 . An expander free electrode for lead acid battery comprising heteroatom embedded carbon nanotube (H-CNT) and lead oxide.

2 . The electrode as claimed in claim 1 , wherein the heteroatom embedded carbon nanotube (H-CNT) is present in the range of 0.001 wt % to 1 wt %.

3 . The electrode as claimed in claim 1 , wherein the heteroatom embedded carbon nanotube (H-CNT) comprises sulphur in the range of 0.001 wt % to 1 wt %.

4 . The electrode as claimed in claim 1 , wherein the heteroatom embedded carbon nanotube (H-CNT) comprises nitrogen in the range of 0.01 ppm to 2000 ppm.

5 . The electrode as claimed in claim 1 , wherein the electrode is having lead sulphate crystallite size in the range of 480 Å to 550 Å.

6 . The electrode as claimed in claim 1 , wherein the electrode is having penetration in the range of 3 dmm to 7 dmm.

7 . A process for preparing an expander free electrode composition for lead acid battery, the process comprising:
a) adding water drop wise to lead oxide to obtain lead oxide-water paste; b) dispersing the heteroatom embedded carbon nanotube (H-CNT) in sulphuric acid; c) mixing the product as obtained in step (b) with lead oxide-water paste of step (a); d) applying the product of step (c) in grid and curing for 72 hours to obtain expander free electrode for lead acid battery.

8 . The process as claimed in claim 7 , wherein the dispersion is done by sonification.

9 . The process as claimed in claim 7 , wherein the process is performed at a temperature in the range of 40° C. to 50° C.

10 . The process as claimed in claim 7 , wherein the heteroatom embedded carbon nanotube (H-CNT) is produced from crude oil or its products or mixture thereof.

11 . The process as claimed in claim 10 , wherein the crude oil or its products or mixture thereof comprises sulphur in the range of 0.001 wt % to 5 wt %.

12 . The process as claimed in claim 10 , wherein the crude oil or its products or mixture thereof comprises nitrogen in the range of 0.01 ppm to 5000 ppm.

13 . The process as claimed in claim 7 , wherein the heteroatom embedded carbon nanotube (H-CNT) comprises sulphur in the range of 0.001 wt % to 1 wt %.

14 . The process as claimed in claim 7 , wherein the heteroatom embedded carbon nanotube (H-CNT) comprises nitrogen in the range of 0.01 ppm to 2000 ppm.

15 . A lead acid battery comprising one or more electrodes as claimed in claim 1 .

Assignees

• Indian Oil Corp Ltd

Inventors

• Mohanasundaram Palvannan
• Samala Bhanumurthy
• Seshubabu Narayanam
• Singh Amardeep
• Raman Naduhatty Selai
• RAMAKUMAR Sankara Sri Venkata
• Das Biswapriya

Classifications

• H01M4/364 Primary

  as mixtures · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• H01M4/20

  of pasted electrodes · CPC title

• H01M4/56

  of lead · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title