Lithium ion battery high-voltage anode material preparation and surface coating method

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as battery failure and scrapping, electrode charge and discharge capacity, and cycle reversible performance attenuation, so as to avoid specific capacity decline and suppress adverse reactions , Improve the effect of interface conditions
CN102005563BInactive Publication Date: 2013-05-01HEFEI GUOXUAN HIGH TECH POWER ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI GUOXUAN HIGH TECH POWER ENERGY
Publication Date
2013-05-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides lithium ion battery high-voltage anode material preparation and surface coating method. The method adopts high-voltage anode material spinel-type LiNi0.5Mn1.5O4 prepared by a two-step method and comprises the following steps of: firstly, evenly mixing nickel source and manganese source solutions with a surface active agent solution, then drying and roasting in the air of 350-450 DEG C to obtain a precursor of a nickel and manganese oxide; mixing the precursor with a lithium source through liquid phase ball milling, drying and finally roasting in the air of 400-900 DEG C to obtain an anode active material; and adding the anode active material to a soluble aluminum solution containing a lithium source, sufficiently and evenly mixing under controlling the lithium source, the soluble aluminum source and the anode active material to be at the proper mol, drying and carrying out high-temperature roasting treatment to obtain a final product which is the lithium ion battery high-voltage anode material which is coated with a layer of lithium-contained transition metal oxide on the surface. The high-voltage anode material prepared by the method has the characteristics of high initial capacity, good cycle performance and the like.
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Description

technical field

[0001] The invention belongs to the field of material synthesis, and in particular relates to a lithium-ion battery cathode material and a preparation method thereof, in particular to a high-voltage lithium-ion battery surface-coated cathode material and a preparation method thereof. technical background

[0002] Lithium-ion secondary batteries have higher energy density than other rechargeable battery systems, and their applications range from various portable electronic devices to zero-emission electric vehicles. At present, more positive materials for lithium-ion batteries have been studied, including LiCoO with a layered structure. 2 , LiNiO 2 , LiMn with spinel structure 2 o 4 , and LiFePO with olivine structure 4 . The voltage of the above-mentioned positive electrode materials relative to the graphite negative electrode is lower than 4V, and the power of the battery is limited to a certain extent. If it is used in an electric vehicle, multiple bat...

Claims

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