A kind of lithium manganese oxide and its preparation method and application

Abstract

The invention belongs to the field of materials, and relates to a lithium manganate and its preparation method and application. The preparation method of the lithium manganate comprises preparing a metal salt into a metal salt solution with a conductivity ≥ 200uS / cm, and then adding manganese metal element and / or manganese metal oxide, dopant, oxidant, water, ammonia solution, The metal salt solution undergoes chemical corrosion and crystallization reaction under the conditions of oxidation-reduction potential ORP value ≤-100mv, complexing agent concentration of 3-50g / L, and electrical conductivity ≥200uS / cm, followed by magnetic separation, solid-liquid separation, and washing Calcined after drying and mixing with lithium source. Adopt the method provided by the present invention to prepare lithium manganate, dissolving and crystallizing process does not produce waste water, and consumes water constantly, thereby can achieve the purpose of being friendly to the environment, and use lithium manganate thus obtained as lithium ion battery cathode material, can also improve The gram capacity and cycle stability of lithium-ion batteries have great industrial application prospects.

Description

technical field

[0001] The invention belongs to the field of materials, and relates to a lithium manganate and its preparation method and application. Background technique

[0002] Lithium-ion batteries are a new generation of green high-energy batteries. They have the advantages of high voltage, high energy density, good cycle performance, small self-discharge, no memory effect, and wide operating temperature range. They are widely used in various electronic equipment, especially power tools and electric The demand for lithium-ion batteries for scooters is increasing day by day. Lithium cobalt oxide material (LiCoO 2 ), multi-component materials, high-nickel materials, lithium manganese oxide materials (LiMn 2 o 4 ). Among them, lithium manganate is fully used in the 3C market due to its stable material and mature technology. LiMn 2 o 4 Considered as the most promising alternative LiCoO in the field of power tools 2 one of the materials. LiMn 2 o 4 As a cathode m...

Images