Modified natural graphite lithium ionic cell cathode material, manufacturing method thereof and application

Abstract

The invention relates to a cathode material of modified natural graphitic lithium ion batteries. The material comprises ball natural graphite with a fixed carbon content over 90 percent, asphalt for coating a transitional vector and nano-pore superconducting graphite, and the weight ration of constituents of the three raw materials is 10: 0.1 to 2.0: 0.1 to 2.0. The cathode material of modified natural graphitic lithium ion batteries is used for manufacturing the lithium ion battery, which is characterized in that the nano-pore superconducting graphite is added in the coating process. The nano-pore superconducting graphite can not modify the property of the raw materials, but can significantly improve the conductivity of the raw materials, without adding with any conductive agent in the application in later stage. And the nano-pore superconducting graphic can be well compatible with an electrolyte and improve the reversible capacity of the materials.

Description

Modified natural graphite lithium ion battery negative electrode material and its manufacturing method and application technical field The invention relates to a negative electrode material for a lithium ion battery and a manufacturing method thereof, in particular to a modified natural graphite lithium ion battery negative electrode material, a manufacturing method and an application thereof. Background technique At present, as a green chemical power source, lithium-ion batteries have incomparable advantages of high voltage, long life, and high energy density compared with traditional lead-acid batteries, nickel-hydrogen batteries, and nickel-cadmium batteries. Since the advent of the first generation of lithium-ion batteries, their anode materials have always been the focus and hotspot of energy material research, and have attracted the attention of many scholars. Later, people thought that the specific capacity of graphite was very limited, so they began to study other ...

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Problems solved by technology

Due to the large specific surface area due to the nanoscale pores or cracks on the surface, it will still cause an increase in irreversible capacity and a decrease in the first efficiency.

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