US 12,272,826 B2 · Porous carbon structure, manufacturing method therefor, positive electrode material using same, and battery using same

Abstract

The present invention addresses the problem of providing: a porous carbon structure that has a high micropore volume and can be self-contained; a manufacturing method therefor; a positive electrode material using the same; and a battery (particularly an air battery) using the same. The present invention is a porous carbon structure that is for a positive electrode for an air battery and has voids and a skeleton formed by incorporating carbon, the porous carbon structure satisfying all of the following conditions (a) to (d). (a) The t-plot external specific surface area is within the range of 300 m2/g to 1600 m2/g; (b) the total volume of micropores having a diameter of 1 nm to 200 nm is within the range of 1.2 cm3/g to 7.0 cm3/g; (c) the total volume of micropores having a diameter of 1 nm to 1000 nm is within the range of 2.3 cm3/g to 10.0 cm3/g; and (d) the overall porosity is within the range of 80% to 99%.

Claims17

Dependent claims

A porous carbon structure for an air battery positive electrode, the porous carbon structure comprising pores and a skeleton containing carbon, and satisfying all of conditions (a) to (e) shown as follows:

(a) a t-plot external specific surface area is in a range of 900 m2/g or more and 1,600 m2/g or less;
(b) a pore volume of the pores having a diameter of 1 nm or more and 200 nm or less is in a range of 2.2 cm3/g or more and 7.0 cm3/g or less;
(c) a pore volume of the pores having a diameter of 1 nm or more and 1,000 nm or less is in a range of 4.0 cm3/g or more and 10.0 cm3/g or less;
(d) an overall porosity is in a range of 92% or more and 99% or less;
and
(e) a pore volume of the pores having a diameter of 200 nm or more and 10,000 nm or less is in a range of 2.3 cm3/g or more and 8.0 cm3/g or less.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/611,984Filed 21 May 2020

Priority

JP 2019-09658523 May 2019

Published

US 2022/0255085 A111 Aug 2022

Granted

8 Apr 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification37 codes

C01B 32/05
Carbon; Compounds thereof: preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
H01M 4/8605
Inert electrodes with catalytic activity, e.g. for fuel cells: porous electrodes
C04B 35/532
Obtained from carbonaceous particles with or without other non-organic components: containing a carbonisable binder
C04B 35/6263
Wet mixtures: characterised by their solids loadings, i.e. the percentage of solids

Porous carbon structure, manufacturing method therefor, positive electrode material using same, and battery using same

Life of this patent

Porous carbon structure, manufacturing method therefor, positive electrode material using same, and battery using same

Life of this patent

Abstract

Claims17