Anode material of lithium ion battery and preparation method thereof

A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of sewage discharge, long production process, and increased cost, and achieve no waste discharge, low raw material and production costs, The effect of increasing the operating voltage

Inactive Publication Date: 2012-03-28
QINGDAO HUAGUAN HENGYUAN LI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a process flow for washing the product with water containing a precipitating agent to remove the residual alkaline substances...

Method used

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  • Anode material of lithium ion battery and preparation method thereof
  • Anode material of lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Take by weighing the reactant raw material lithium carbonate, manganese carbonate, aluminum hydroxide, magnesium carbonate with higher purity in the ratio of 1.01: 1.9: 0.1: 0.05 by the ratio of molar fractions of Li: Mn: Al: Mg, will weigh The measured lithium carbonate, manganese carbonate and aluminum hydroxide are mixed and milled; the weighed magnesium carbonate is used for later use;

[0036](2) Using the heating device of the electric heating tunnel heating furnace, put the mixed and ground mixture raw materials into a flat-bottomed ceramic bowl, and fill it with two-thirds of the capacity of the bowl, level the surface of the mixture, do not pile up the tip, and install the raw materials The ceramic flat-bottomed bowl is sent into the tunnel heating furnace for heating through the porcelain roller, and the air atmosphere is heated at a heating rate of 20°C / min. When the temperature reaches 800°C, it is kept for 15 hours;

[0037] (3) The ceramic flat-bottome...

Embodiment 2

[0045] (1) Take by weighing the higher reactant raw material lithium carbonate, manganese carbonate, aluminum hydroxide, zinc nitrate with the ratio of 1.03: 1.85: 0.15: 0.05 by the mole fraction ratio of Li: Mn: Al: Zn, will weigh The measured lithium carbonate, manganese carbonate and aluminum hydroxide are mixed and mixed; the weighed zinc nitrate is set aside;

[0046] (2) Using the heating device of the electric heating tunnel heating furnace, put the mixed and ground mixture raw materials into a flat-bottomed ceramic bowl, and fill it with two-thirds of the capacity of the bowl, level the surface of the mixture, do not pile up the tip, and install the raw materials The ceramic flat-bottomed bowl is sent into the tunnel heating furnace for heating through the porcelain roller, and the air atmosphere is heated at a heating rate of 20°C / min. When the temperature reaches 800°C, it is kept for 18 hours;

[0047] (3) The ceramic flat-bottomed bowl in step (2) is withdrawn from...

Embodiment 3

[0055] (1) Take by weighing the higher purity reactant raw materials lithium carbonate, manganese dioxide, dichromium trioxide, aluminum hydroxide in the ratio of 1.02: 1.9: 0.1: 0.06 by the molar ratio of Li: Mn: Cr: Al 1. Mix and grind the weighed lithium carbonate, manganese dioxide, and chromium trioxide, and weigh the aluminum hydroxide for subsequent use;

[0056] (2) Using the heating device of the electric heating tunnel heating furnace, put the mixed and ground mixture raw materials into a flat-bottomed ceramic bowl, and fill it with two-thirds of the capacity of the bowl, level the surface of the mixture, do not pile up the tip, and install the raw materials The ceramic flat-bottomed bowl is sent into the tunnel heating furnace for heating through the porcelain roller, and the air atmosphere is heated at a heating rate of 5°C / min. When the temperature reaches 800°C, it is kept for 18 hours;

[0057] (3) The ceramic flat-bottomed bowl in step (2) is withdrawn from the...

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Abstract

The invention discloses an anode material of a lithium ion battery and a preparation method thereof. The anode material which is granular comprises: an internal nucleus which is a substance having a molecular formula of LixMn2-yMyNzO4; and an external surface crystal shell which is nitrogen-containing nanometer oxide particles. According to the anode material of the lithium ion batter disclosed in the invention, M is doped to replace partial Mn, and the crystal lattice volume is reduced because the bond energy of M-O is greater than the bond energy of Mn-O, so the spinel structure of lithium manganate is stabilized, the manganese solution in the cycle process is reduced, and the product cycle performance is improved. The preparation method of the anode material of the lithium ion battery disclosed in the invention, which allows the lithium manganese oxide to be doped and coated through a two-step reaction, has the advantages of simple production technology, no pollution, no waste discharge, simple equipment, low cost of raw materials and the production cost, and the like.

Description

technical field [0001] The invention relates to a battery positive electrode material, in particular to a lithium ion secondary battery positive electrode material and a preparation method of the material. Background technique [0002] In 1978, Armand proposed that both the positive and negative electrodes use TiS which can allow lithium ions to be intercalated and extracted. 2 Concentration battery is formed. During the charging and discharging process of this kind of battery, lithium ions are intercalated and extracted between the two electrodes, which is vividly called a "rocking chair" lithium-ion secondary battery. However, the battery voltage is only 0-2V, which does not have the high voltage characteristics of lithium batteries. In early 1980, LiCoO was discovered 2 with TiS 2 The same layered structure, in the same year, Oxford University Goodendugh et al. proposed to use LiCoO 2 , LiNiO 2 , LiMn 2 o 4 As the positive electrode material, the research on posit...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/62
CPCY02E60/12Y02E60/10
Inventor 胡章勇孟升
Owner QINGDAO HUAGUAN HENGYUAN LI TECH
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