Compositions for preparing expander free electrodes for lead acid battery and performance thereof
AssigneeIndian Oil Corporation Limited
InventorsPalvannan Mohanasundaram, Bhanumurthy Samala, Narayanam Seshubabu, Amardeep Singh, Naduhatty Selai Raman, Sankara Sri Venkata Ramakumar, Biswapriya Das
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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.
Claims12
An expander free electrode for lead acid battery comprising heteroatom embedded carbon nanotube (H-CNT) and lead oxide, wherein the heteroatom embedded carbon nanotube (H-CNT) comprises Sulphur in the range of 0.001 wt % to 1 wt % and wherein the electrode is having lead sulphate crystallite size in the range of 480 Å to 550 Å.
An expander free electrode for lead acid battery comprising heteroatom embedded carbon nanotube (H-CNT) and lead oxide, wherein the electrode is having penetration in the range of 3 dmm to 7 dmm.
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.
Dependencies are inferred from the claim text.