Negative electrode of power storage device and power storage device

Patent metadata

Field	Value
Publication number	US-10998141-B2
Application number	US-202016840659-A
Country	US
Kind code	B2
Filing date	Apr 6, 2020
Priority date	Aug 31, 2011
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A mixture of amorphous PAHs and at least one of a carrier ion storage metal, a Sn compound, a carrier ion storage alloy, a metal compound, Si, Sb, and SiO2 is used as the negative electrode active material. The theoretical capacity of amorphous PAHs greatly exceeds that of a graphite based carbon material. Thus, the use of amorphous PAHs enables the negative electrode active material to have a higher capacity than in the case of using the graphite-based carbon material. Further, addition of at least one of the carrier ion storage metal, the Sn compound, the carrier ion storage alloy, the metal compound, Si, Sb, and SiO2 to the amorphous PAHs enables the negative electrode active material to have a higher capacity than the case of only using the amorphous PAHs.

First claim

What is claimed is:

1. A method for manufacturing an active material, comprising the steps of:
mixing a first particle and a second particle to obtain a mixture; and
baking the mixture under an inert atmosphere at a temperature greater than or equal to 600° C. and less than or equal to 800° C. to form an active material particle comprising a polycyclic aromatic hydrocarbon after mixing the first particle and the second particle,
wherein the active material particle has a shape that the second particle is attached to an outer surface of the first particle,
wherein the first particle comprises one selected from the group consisting of a phenol resin, a furfuryl alcohol resin and a saccharide in the mixture,
wherein the second particle comprises a compound in the mixture, and
wherein the mixture comprises any one of Sn, Co, Ni, Mn, Fe, V and Si.

2. The method for manufacturing the active material according to claim 1 , wherein the second particle comprises any one of CoO, NiO, MnO 2 and FePO 4 .

3. The method for manufacturing the active material according to claim 1 ,
wherein the first particle comprises a phenol resin in the mixture, and
wherein the active material particle comprises a polyacenic material.

4. The method for manufacturing the active material according to claim 1 , wherein the mixing of the first particle and the second particle is a dry-mixing.

5. The method for manufacturing an active material according to claim 1 , further comprising the step of:
conducting ultrasonic cleaning of the first particle in an organic solvent before mixing the first particle and the second particle.

6. The method for manufacturing an active material according to claim 5 , wherein the organic solvent is acetone.

7. A method for manufacturing an active material, comprising the steps of:
conducting ultrasonic cleaning of a first particle in an organic solvent;
mixing the first particle and a second particle to obtain a mixture;
baking the mixture under an inert atmosphere to form an active material particle comprising a polycyclic aromatic hydrocarbon after mixing the first particle and the second particle,
wherein the active material particle has a shape that the second particle is attached to an outer surface of the first particle in the active material particle,
wherein the first particle is a spherical phenol resin particle before and after the ultrasonic cleaning,
wherein the second particle comprises a compound in the mixture,
wherein the mixture comprises any one of Sn, Co, Ni, Mn, Fe, V and Si, and
wherein an amount of the second particle to the first particle is greater than or equal to 1 wt% and less than or equal to 50 wt%.

8. The method for manufacturing an active material according to claim 7 , wherein the organic solvent is acetone.

9. The method for manufacturing the active material according to claim 7 , wherein the second particle comprises any one of CoO, NiO, MnO 2 and FePO 4 .

10. The method for manufacturing the active material according to claim 7 ,
wherein the first particle comprises a phenol resin in the mixture, and
wherein the active material particle comprises a polyacenic material.

11. The method for manufacturing the active material according to claim 7 , wherein the mixing of the first particle and the second particle is a dry-mixing.

Assignees

• Semiconductor Energy Lab

Inventors

• Saito Yumiko
• Yokoi Rie
• Mikami Mayumi

Classifications

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/387

  Tin or alloys based on tin · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/483

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title