Method for preparing high-density spherical lithium iron phosphate

Abstract

This invention discloses a high density ball ferric phosphate lithium process method in energy material process technique, which comprises the following steps: to use ferric nitrate, phosphate chrome and acetic acid lithium as materials and to add deionized water to process solution A; to mix impurity metal compound or carbon source into the solution A; to make solution of hexamethylenetetramine and carbamide to process solution B; to make solution C by adding solution B into solution A; to drop solution C with kerosene and to heat it into gel for deposition; to get the ball dry gel front driver after centrifugal separation; to get the high volume proportion capacity high density ferric phosphate lithium through high temperature process.

Description

technical field

[0001] The invention belongs to the technical field of energy materials. In particular, it relates to a preparation method of a high-density spherical lithium iron phosphate used as a positive electrode material of a lithium ion battery. Background technique

[0002] Lithium-ion battery is a new generation of green high-energy battery. It has many advantages such as high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, and wide operating temperature range. It is widely used in mobile phones, notebook computers, UPS, Camcorders, various portable electric tools, electronic instruments, weapons and equipment, etc. also have good application prospects in electric vehicles, and are considered to be high-tech products that are of great significance to the national economy and people's lives in the 21st century.

[0003] Cathode materials are an important part of lithium-ion batteries. Currently, the most studied cathod...