Anode material for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery using such anode material

A non-aqueous electrolyte secondary battery comprising:

• anode consisting of carbon material capable of carrying out doping/undoping of lithium, cathode, and non-aqueous electrolytic solution in which electrolyte is dissolved in non-aqueous solvent,
• wherein, as carbon material constituting the anode, there is included carbon fiber in which area replenishment rate defined as value obtained by dividing area of the cross section thereof by area of circumscribed rectangle of the minimum area surrounding the cross section is 0.8 or more.

An anode material for non-aqueous electrolyte secondary battery,

• the anode material consisting of carbon fiber capable of carrying out doping/undoping of lithium,
• wherein the carbon fiber is such that the high order structure of the cross section is random radial type structure, and that value of fractal dimension of the cross section is 1.1 or more and is less than 1.8.

A method of manufacturing an anode material for non-aqueous electrolyte secondary battery,

• wherein, in applying pressure to softened pitch to carry out discharge/fiber-forming thereof, discharge/fiber-forming is carried out while applying ultrasonic wave to a discharge hole to form precursor of carbon fiber.

A method of manufacturing an anode material for non-aqueous electrolyte secondary battery,

• wherein, in applying pressure to softened pitch to carry out discharge/fiber-forming, discharge/fiber-forming is carried out while applying magnetic field to a discharge hole to form precursor of carbon fiber.

A non-aqueous electrolyte secondary battery comprising:

• anode consisting of carbon material capable of carrying out doping/undoping of lithium, cathode, and non-aqueous electrolytic solution in which electrolyte is dissolved in non-aqueous solvent,
• wherein, as carbon material constituting the anode, there is included carbon fiber in which the high order structure of the cross section thereof is random radial type structure, and that value of fractal dimension of the cross section is 1.1 or more and is less than 1.8.

An anode material for non-aqueous electrolyte secondary battery,

• the anode material consisting of carbon fiber capable of carrying out doping/undoping of lithium,
• wherein the carbon fiber has cross sectional high order structure in which the central portion is radial type structure and the surface layer portion is random radial type structure.

A non-aqueous electrolyte secondary battery comprising:

• anode consisting of carbon material capable of carrying out doping/undoping of lithium, cathode, and non-aqueous electrolytic solution in which electrolyte is dissolved in non-aqueous solvent,
• wherein, as carbon material constituting the anode, there is included carbon fiber having cross section high order structure in which the central portion is radial type structure and the surface layer portion is random radial type structure.

An anode material for non-aqueous electrolyte secondary battery,

• the anode material consisting of carbon fiber capable of carrying out doping/undoping of lithium,
• wherein the carbon fiber has notch structure at the cross section thereof.

A non-aqueous electrolyte secondary battery comprising:

• anode consisting of carbon material capable of carrying out doping/undoping of lithium, cathode, and non-aqueous electrolytic solution in which electrolyte is dissolved in non-aqueous solvent,
• wherein, as carbon material constituting the anode, there is included carbon fiber having notch structure at the cross section thereof.

An anode material for non-aqueous electrolyte secondary battery,

• the anode material consisting of carbon fiber capable of carrying out doping/undoping of lithium,
• wherein the carbon fiber is carbon fiber formed by crushing carbon fiber having cross sectional portions periodically different in the crystal structure in a fiber length direction.

A non-aqueous electrolyte secondary battery comprising:

• anode consisting of carbon material capable of carrying out doping/undoping of lithium, cathode, and non-aqueous electrolytic solution in which electrolyte is dissolved in non-aqueous solvent,
• wherein, as carbon material constituting the anode, there is included carbon fiber formed by crushing carbon fiber having cross sectional portions periodically different in the crystal structure in a fiber length direction.