IP Library › Granted Patent US 12,456,759
Granted Patent B2
US 12,456,759 · App. 17/834,488 · Granted Oct 28, 2025

Nanoparticle-enhanced lead-acid electrode paste and improved lead-acid batteries made therefrom

Inventor: William H. Niedermeyer (West Jordan, UT)
Assignee: EVOQ NANO, INC.
H01M10/08H01M4/14H01M4/20H01M2004/021H01M2004/027H01M2004/028H01M10/06H01M10/12
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Quick Facts
Patent No.
US 12,456,759
App. No.
17/834,488
Granted
Oct 28, 2025
Kind
B2
Abstract

This disclosure relates to improved electrode pastes that include a carrier, basic lead sulfate compounds, and ground state metal nanoparticles formed by laser ablation (e.g., spherical-shaped nanoparticles). Improved lead-acid batteries can be made using improved electrode pastes that include a carrier, basic lead sulfate compounds, and ground state metal nanoparticles formed by laser ablation. Methods for manufacturing lead-acid batteries of improved performance include applying an improved electrode paste to a least a portion of the positive and/or negative electrodes, placing the electrodes in a container, and placing an electrolyte in contact with the electrodes. The metal nanoparticles may comprise or consist of gold. The metal nanoparticles may by spherical-shaped and/or coral-shaped.

Claims (34)

1 . An electrode paste for use in manufacturing lead-acid batteries comprising:

a carrier;

one or more of lead (II) sulfate monobasic (PbO·PbSO 4 ), lead (II) sulfate dibasic (2PbO·PbSO 4 ), lead (II) sulfate tribasic (3PbO·PbSO 4 ), or lead (II) sulfate tetrabasic (4PbO·PbSO 4 ); and

ground state metal nanoparticles formed by laser ablation so as to have a smooth surface with no external bond angles or edges, wherein the ground state metal nanoparticles are free of capping agents and are not bound to organic molecules.

2 . The electrode paste of claim 1 , wherein the carrier includes a binder.

3 . The electrode paste of claim 2 , wherein the binder is a polymer binder.

4 . The electrode paste of claim 1 , wherein the carrier includes water and/or sulfuric acid.

5 . The electrode paste of claim 1 , wherein the ground state metal nanoparticles comprise gold.

6 . The electrode paste of claim 1 , wherein the ground state metal nanoparticles comprise spherical-shaped nanoparticles.

7 . The electrode paste of claim 6 , wherein the spherical-shaped nanoparticles have a mean diameter of less than 20 nm, or less than 15 nm, or less than 10 nm, or less than 7 nm.

8 . The electrode paste of claim 1 , wherein the nanoparticles comprise coral-shaped nanoparticles.

9 . The electrode paste of claim 8 , wherein the coral-shaped nanoparticles have a mean length of less than 100 nm, or less than 80 nm, or less than 60 nm, or less than 40 nm, such as or in a range of 25 nm to 80 nm.

10 . The electrode paste of claim 1 , wherein the electrode paste includes the ground state metal nanoparticles at a concentration in a range of 100 ppb to 100 ppm, 50 ppm, 25 ppm, 10 ppm, 5 ppm, or 2 ppm.

11 . A lead-acid battery having enhanced performance, comprising:

a plurality of positive electrodes comprising lead (IV) oxide (PbO 2 );

a plurality of negative electrodes comprising ground state lead (Pb); and

an electrode paste coated on or impregnated in at least portion of the positive electrodes and the negative electrodes, the electrolyte electrode paste comprising (i) a carrier, (ii) one or more of lead (II) sulfate monobasic (PbO·PbSO 4 ), lead (II) sulfate dibasic (2PbO·PbSO 4 ), lead (II) sulfate tribasic (3PbO·PbSO 4 ), or lead (II) sulfate tetrabasic (4PbO·PbSO 4 ), and (iii) ground state metal nanoparticles formed by laser ablation so as to have a smooth surface with no external bond angles or edges, wherein the ground state metal nanoparticles are free of capping agents and are not bound to organic molecules; and

a container in which the positive electrodes, negative electrodes, and electrode paste are positioned.

12 . The lead-acid battery of claim 11 , further comprising an electrolyte in contact with the positive electrodes and the negative electrodes, the electrolyte comprising aqueous sulfuric acid.

13 . The lead-acid battery of claim 11 , wherein the inclusion of the metal nanoparticles in the electrode paste increases a fully charged resting voltage of the battery as compared to a fully charged resting voltage of a same battery that omits the metal nanoparticles.

14 . The lead-acid battery of claim 11 , wherein the inclusion of the metal nanoparticles in the electrode paste increases a cranking amps or cold cranking amps rating of the battery as compared to the cranking amps or cold cranking amps rating of a same battery that omits the metal nanoparticles.

15 . The lead-acid battery of claim 11 , wherein the inclusion of the metal nanoparticles in the electrode paste increases a reserve capacity of the battery as compared to a reserve capacity of a same battery that omits the metal nanoparticles.

16 . The lead-acid battery of claim 12 , wherein the electrolyte includes ground state metal nanoparticles.

17 . The lead-acid battery of claim 16 , wherein the ground state metal nanoparticles are included in a concentration of at least 100 ppb and up to 100 ppm, or up to 50 ppm, or up to 25 ppm, or up to 10 ppm, or up to 5 ppm.

18 . A method of manufacturing a lead-acid battery of enhanced performance, comprising:

providing an electrode paste comprising (i) a carrier, (ii) one or more of lead (II) sulfate monobasic (PbO·PbSO 4 ), lead (II) sulfate dibasic (2PbO·PbSO 4 ), lead (II) sulfate tribasic (3PbO·PbSO 4 ), or lead (II) sulfate tetrabasic (4PbO·PbSO 4 ), and (iii) ground state metal nanoparticles formed by laser ablation so as to have a smooth surface with no external bond angles or edges, wherein the ground state metal nanoparticles are free of capping agents and are not bound to organic molecules;

applying the electrode paste to a plurality of positive electrode plates comprising lead (IV) oxide (PbO 2 );

applying the electrode paste to a plurality of negative electrode plates comprising ground state lead (Pb); and

positioning the positive and negative electrode plates within an electrically insulated container.

19 . The method of claim 18 , further comprising positioning separators between pairs of positive and negative electrode plates.

20 . The method of claim 18 , further comprising placing an electrolyte comprising aqueous sulfuric acid inside the insulated container in contact with the positive and negative electrode plates.

21 . A method of manufacturing an enhanced battery electrode paste comprising:

providing a battery electrode paste formed from lead oxide, sulfuric acid, and water to form one or more lead sulfate compounds selected from PbO·PbSO 4 (monobasic lead sulfate), 2PbO·PbSO 4 (dibasic lead sulfate), 3PbO·PbSO 4 (tribasic lead sulfate), and 4PbO·PbSO 4 (tetrabasic lead sulfate); and

adding nonionic, ground state gold or gold alloy nanoparticles that are free of capping agents and not bound to any organic molecules to yield the enhanced battery electrode paste, wherein the gold or gold alloy nanoparticles are formed by laser ablation so as to have a smooth surface with no external bond angles or edges.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 7, 2022
From: NIEDERMEYER, WILLIAM H.
To: EVOQ NANO, INC.
Reel/Frame 060125/0499 →
Continuity (4)
Continuation In Part PCTUS2022071448 · Mar 30, 2022
Continuation In Part 17216996 · Mar 30, 2021
Provisional Application 63197605 · Jun 7, 2021
Related Publication 20220328886A1 · Oct 13, 2022
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