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

Abstract

The invention relates to a lithium battery anode material provided with high electric capacity (more than 130 mAh/g) - LiBiSnO4 or LiBiTiO4 or LiBiPbO4 or LiInSnO4 or LiInTiO4 or LiInPbO4. The high-temperature solid state sintering preparation method for the lithium battery anode material comprises the following steps: Li2O or Bi2O3 or PbO2 and SnO2 or TiO2or PbO2 are taken as raw materials with a purity of 99.99 percent; the three raw materials are fully mixed according to the mole proportion of 1 to 1 to 2; mixture is grinded in a ball mill, and grain diameter of powder reaches 1 to 2 micrometers; the mixture is dried for 4+-2 hours under the temperature of 100+-20 DEG C; the powder is pressed into sheets and put into a high-temperature sintering furnace for burning; the sheets are crushed and pressed into sheets and then put into the high-temperature sintering furnace for the third time, and temperature is raised from room temperature to 900 to 1400 DEG C; after heat preservation for 25 to 36 hours, the sheets are cooled along with the furnace; the powder sheets are taken out and crushed, and grain diameter of the sheets after crushing is 0.5 to 1.2 micrometers; pure single-phase lithium battery anode material is prepared successfully.

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 no LiBiSnO 4 、LiBiTiO 4 , LiBiPbO 4 , LiInSnO 4 , LiInTiO 4 , LiInPbO 4 Disclosure of Composite Oxide as Lithium-ion Battery Cathode Material