Anode material of lithium cell and solid-phase sintering production method at high temperature

Abstract

The invention relates to the anode material used by lithium battery with high capacity (bigger than 127mAh / g), which comprises LiSbSnO4, LiSbTiO4, LiSbPbO4, LiSbMnO4, LiBiMnO4, LiInMnO4, LiAlMnO4 LiAlSnO4 or LiAlTiO4. The preparation method comprises the steps: one in Sb2O3, Al2O3, Bi2O3 or In2O3, one in SnO2, MnO2, TiO2 or PbO2 and Li2O are taken as raw materials to be fully mixed with a molar ratio of 1:2:1 and then ball milled in a ball mill; particle diameter of the powder is 1-2 micrometers; the powder is parched for 4 hours under a temperature of 100 DEG C and is planished tablet to be sintered in a high-temperature sintering furnace. The temperature of the furnace is raised to 250-500 DEG C; the powder is put into the high-temperature sintering furnace for the third time and the temperature is raised to 900-1400 DEG C from the room temperature; then the pure anode material of the single-phase lithium battery is successfully prepared.

Description

technical field [0001] The invention relates to a cathode material of a lithium battery and a preparation method thereof. Background technique [0002] Since the commercial production of lithium-ion batteries by Sony Corporation of Japan in 1990, lithium-ion batteries have attracted more and more attention from the battery industry at home and abroad due to a series of advantages such as high energy density, long cycle life, high open circuit voltage, safety and pollution-free. , and its R&D and production are also popular in the battery industry. At present, lithium-ion batteries are divided into two categories: liquid lithium-ion batteries and polymer lithium-ion batteries. [0003] In order to achieve large-scale commercialization of polymer lithium-ion batteries, the following main problems still need to be solved: a. It is necessary to develop positive electrode materials with high discharge voltage, large capacity, and long charge-discharge cycle life. electrical com...

AI Technical Summary

Problems solved by technology

[0003] In order to achieve large-scale commercialization of polymer lithium-ion batteries, the following main problems still need to be solved: a. It is necessary to develop a battery with high discharge voltage, large capacity, and high charge-discharge cycle Positive electrode material with long life, which needs to have good electrical compatibility with the electrolyte to reduce contact resistance; b. It is necessary to develop negative electrode materials without dendrites and long charge and discharge cycle life; c. It is necessary to develop Polymer electrolyte with high conductivity. The polyether solid electrolyte that has been studied more at present has low conductivity after doping, and the internal resistance of the battery is large and the discharge current is small.

There is still no LiSbSnO 4 , LiSbTiO 4 , LiSbPbO 4 , LiSbMnO 4 , LiBiMnO 4 , LiInMnO 4 , LiAlMnO 4 LiAlSnO 4 or LiAlTiO 4 Disclosure of Composite Oxide as Lithium-ion Battery Cathode Material