Production method of rare-earth wide-temperature lithium-ion battery

Abstract

The invention provides a production method of a rare-earth wide-temperature lithium-ion battery. The production method of the rare-earth wide-temperature lithium-ion battery comprises the steps of preparing a mixed saline solution by using dissoluble metal salts and a rare-earth compound according to a certain mole ratio; and carrying out reaction between the mixed saline solution and a mixed alkaline solution under a certain condition, then mixing with lithium salt powder according to a certain proportion, and roasting the mixture to obtain a cathode material of the rare-earth wide-temperature lithium-ion battery. The rare-earth element is added into the cathode material of the lithium-ion battery to keep the crystal structure of the cathode material, and only the lattice constant C is changed, for example, a rare-earth yttrium element is added into the cathode material lithium manganate to enable yttrium to be doped into the cathode material LiMn2O4, thereby forming a LiY0.02Mn1.98O4 compound. The lithium-ion battery added with the rare-earth element is verified to have relatively high reversible capacity, good cycle performance, strong adaptability to high and low temperatures; and the lithium-ion battery added with the rare-earth element can be used at -45 DEG C after being subjected to technical processing.

Description

technical field [0001] The invention relates to the technical field of battery production, and more specifically relates to a production method of a rare-earth wide-temperature lithium-ion battery. Background technique [0002] With the continuous development of social civilization in recent years, especially since human society entered the information age and network age, it is more eager for high-quality electric energy. Therefore, batteries, especially secondary batteries, will inevitably play a pivotal role in the future society based on electric energy. Since the late 1990s, portable electronic devices such as mobile phones and notebook computers have been rapidly popularized around the world at an astonishing speed, and they have entered the homes of ordinary people faster and faster. The result is a rapid increase in the demand for small power supplies. Since portable electronic devices are compact and lightweight, they require small power supplies with the advantag...

AI Technical Summary

Problems solved by technology

At present, the starting power supplies for various automobiles are lead-acid batteries. Compared with lithium-ion batteries, they have disadvantages such as large volume, heavy weight, short cycle life, and narrow temperature adaptation range (currently 0°C-60°C). The market demand for ion batteries