Nippon Steel Chemical Co., Ltd.

Nippon Steel & Sumikin Chemical Co., Ltd.

Taisa Ikeda

Yoichi Kawano

Kazuki Tagawa

Hiroshi Ono

Hideki Ono

Tetsusei Fukuda

Keiji Taura

Ryoji Akamine

A negative electrode active material of lithium secondary battery includes: at least one of a petroleum-derived green coke and a coal-derived green coke; and at least one of a petroleum-derived calcined coke and a coal-derived calcined coke within a mass ratio range of 90:10 to 10:90 which are fired.

Negative electrode active material of lithium secondary battery, negative electrode of lithium secondary battery, lithium secondary battery for vehicle installation using the negative electrode active material and negative electrode, and method for manufacturing the negative electrode active material

A negative electrode active material of lithium secondary battery includes: at least one of a petroleum-derived green coke and a coal-derived green coke, and at least one of a petroleum-derived calcined coke and a coal-derived calcined coke within a mass ratio range of 90:10 to 10:90, and a phosphorous compound within a range of 0.1 to 6.0 parts by mass in amount equivalent to phosphor relative to 100 parts by mass of the at least one of the green cokes and the at least one of the calcined cokes.

Negative electrode active material of lithium secondary battery, secondary battery using the same, method for manufacturing the same

A negative electrode active material of lithium secondary battery include: at least one of a petroleum-derived green coke and a coal-derived green coke, and at least one of a petroleum-derived calcined coke and a coal-derived calcined coke within a mass ratio range of 90:10 to 10:90; a phosphorous compound within a range of 0.1 to 6.0 parts by mass in amount equivalent to phosphor relative to 100 parts by mass of the at least one of the green cokes and the at least one of the calcined cokes; and a boron compound within a range of 0.1 to 6.0 parts by mass in amount equivalent to boron relative to 100 parts by mass of the at least one of the green cokes and the at least one of the calcined cokes.

Provided are an amorphous coke for a special carbon material characterized in that it is an amorphous coke obtained by blending a coal tar base heavy oil and/or a petroleum base heavy oil with a resin and subjecting the mixture to thermal decomposition polycondensation; it has a larger thermal expansion coefficient than that of a coke obtained from a heavy oil alone; and a molded article of the coke is shrunk by 0.3% or more in terms of a volume change rate before and after the treatment when it is subjected to graphitizing treatment, and a production process of an amorphous coke for a special carbon material characterized in that in subjecting a coal tar base heavy oil or a petroleum base heavy oil to thermal decomposition polycondensation, the raw material is blended with a resin to modify a coke crystal structure.

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Kitakyushu, Japan

Taisa Ikeda