NONAQUEOUS SECONDARY BATTERY - MITSUBISHI CHEM CORP

Title:

NONAQUEOUS SECONDARY BATTERY

Document Type and Number:

Japanese Patent JP3531274

Kind Code:

B2

Abstract:

PURPOSE: To easily provide a negative electrode material suitable for nonaqueous secondary battery having a large charge and discharge capacity by heating a coke whose O/C is made to a specified value by oxidization with a mineral acid at a specified temperature under inert gas atmosphere.
CONSTITUTION: A crude coke obtained, for example, by thermally treating coal tar pitch at about 400-500°C by an autoclave is pulverized to make a maximum diameter less than about 100μm. The resulting coke is oxidized by the contact with nitric acid (concentration of about 1-16N) at about room temperature-less than 100°C for several minutes to several hours to provide a coke having an O/C of 0.20 or more (atomic ratio). This coke is heated at 900-1500°C under inert gas atmosphere. Thus, a negative electrode material suitable for nonaqueous secondary battery having a large charge and discharge capacity can be provided from inexpensive coke.

More Like This:

JP4794972	Negative electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery including it
JP5428125	Positive electrode active material for non-aqueous electrolyte secondary batteries, and non-aqueous electrolyte secondary batteries using this
JPH11191416	POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY

Inventors:

Miyasaka, Jinichi
Ishihara, Masaji
Fuse, Toru
Machino, Haruko

Application Number:

JP9529095A

Publication Date:

May 24, 2004

Filing Date:

April 20, 1995

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI CHEM CORP

International Classes:

H01M10/05; H01M4/587; H01M10/0568; H01M10/0569; (IPC1-7): H01M4/58; H01M4/02; H01M10/40

Attorney, Agent or Firm:

長谷川曉司

Previous Patent: FREEZER DEVICE

Next Patent: OUTDOOR EQUIPMENT OF AIR CONDITIONER