Jeffrey Edward Long

US Patent:

20210344001, Nov 4, 2021

Filed:

Jul 14, 2021

Appl. No.:

17/375381

Inventors:

- Arlington VA, US
Joseph F. Parker - Riva MD, US
Jeffrey W. Long - Alexandria VA, US
Debra R. Rolison - Arlington VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

H01M 4/30
H01M 4/38
H01M 4/04
H01M 4/24
B22F 3/11
B22F 3/10
H01M 10/24

Abstract:

Disclosed are methods of making porous zinc electrodes. Taken together, the steps are: forming a mixture of water, a soluble compound that increases the viscosity of the mixture, an insoluble porogen, and metallic zinc powder; placing the mixture in a mold to form a sponge; optionally drying the sponge; placing the sponge in a metal mesh positioned to allow air flow through substantially all the openings in the mesh; heating the sponge in an inert atmosphere at a peak temperature of 200 to 420 C. to fuse the zinc particles to each other to form a sintered sponge; and heating the sintered sponge in an oxygen-containing atmosphere at a peak temperature of 420 to 700 C. to form ZnO on the surfaces of the sintered sponge. The heating steps burn out the porogen.

US Patent:

20210020916, Jan 21, 2021

Filed:

Jul 17, 2020

Appl. No.:

16/932695

Inventors:

- Arlington VA, US
Joseph F. Parker - Riva MD, US
Jeffrey W. Long - Alexandria VA, US
Debra R. Rolison - Arlington VA, US

Assignee:

The Government of the United States of America, as represented by the Secretary of the Navy - Arlington VA

International Classification:

H01M 4/30
H01M 4/38
H01M 4/04
H01M 4/24
H01M 10/24
B22F 3/11
B22F 3/10

Abstract:

Disclosed are methods of making porous zinc electrodes. Taken together, the steps are: forming a mixture of water, a soluble compound that increases the viscosity of the mixture, an insoluble porogen, and metallic zinc powder; placing the mixture in a mold to form a sponge; optionally drying the sponge; placing the sponge in a metal mesh positioned to allow air flow through substantially all the openings in the mesh; heating the sponge in an inert atmosphere at a peak temperature of 200 to 420 C. to fuse the zinc particles to each other to form a sintered sponge; and heating the sintered sponge in an oxygen-containing atmosphere at a peak temperature of 420 to 700 C. to form ZnO on the surfaces of the sintered sponge. The heating steps burn out the porogen.