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Titanium acid lithium battery cathode material containing rare metal elements

A rare metal element, lithium titanate battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor electrochemical capacity, achieve the effects of low equipment requirements, good reproducibility, and simple preparation process

Inactive Publication Date: 2011-05-11
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Thanks to Li 4 Ti 5 o 12 The electrical conductivity of the material, although its fast charge and discharge performance and high current charge and discharge performance can be improved by doping, but the electrochemical capacity is poor

Method used

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  • Titanium acid lithium battery cathode material containing rare metal elements
  • Titanium acid lithium battery cathode material containing rare metal elements
  • Titanium acid lithium battery cathode material containing rare metal elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Lithium hydroxide, anatase titanium dioxide and cerium oxide are selected as raw materials, wherein the molar ratio of lithium hydroxide to anatase titanium dioxide is 0.81:1, and cerium oxide accounts for 1 wt% of the total weight of the three raw materials. The three raw materials were mixed, methanol dispersant was added, ball milled on a ball mill for 6 hours, and the precursor was obtained after microwave drying.

[0028] The precursor is further processed as follows: firstly in the air atmosphere at a temperature of 500 ° C, high temperature treatment for 2 hours, after cooling, the ball mill passes through a 150 mesh sieve, and the product after sieving is kept at a temperature of 500 ° C for 2 hours, and then the temperature is raised to 800 ° C Keep warm for 8 hours, then cool down to 600°C and keep warm for 2 hours, and finally cool down to room temperature and then ball mill through a 150-mesh sieve to get lithium titanate Li 4 Ti 5 o 12 sample. Observed b...

Embodiment 2

[0031] Lithium carbonate, anatase titanium dioxide and neodymium oxide are selected as raw materials, wherein the molar ratio of lithium carbonate and anatase titanium dioxide is 0.85:1, and neodymium oxide accounts for 3 wt% of the total weight of the three raw materials. Mix the three raw materials, add ethanol dispersant, ball mill on a ball mill for 7 hours, and microwave dry to obtain the precursor.

[0032] The precursor is further processed as follows and the further processing is the same as in Example 1. Observed by an electron microscope (SEM), the material particles are uniform and fine. After the X-ray powder diffraction (XRD) test, the pH value of the single spinel structure is 10.5, and the particle size analysis particle D50 is 4um.

[0033] The preparation of the pole piece, the assembly of the button cell and the electrochemical performance test are the same as in the first embodiment. For the first time, the specific capacity is 160mAh / g, and the performance...

Embodiment 3

[0035] Lithium hydroxide, gold-red titanium dioxide and cerium oxide are selected as raw materials, wherein the molar ratio of lithium hydroxide to anatase titanium dioxide is 0.8:1, and cerium oxide accounts for 0.5 wt% of the total weight of the three raw materials. Mix the three raw materials, add ethanol dispersant, ball mill on a ball mill for 6 hours, and microwave dry to obtain the precursor.

[0036] The precursor is further processed as follows and the further processing is the same as in Example 1. Observed by an electron microscope (SEM), the material particles are uniform and fine. After the X-ray powder diffraction (XRD) test, the pH value of the single spinel structure is 10.9, and the particle size analysis particle D50 is 5um.

[0037] The preparation of the pole piece, the assembly of the button cell and the electrochemical performance test are the same as in the first embodiment. For the first time, the specific capacity is 150mAh / g, and the performance of t...

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Abstract

The invention relates to titanium acid lithium battery cathode material containing rare metal elements, which comprises a synthesized lithium titanate material. A or a plurality of rare metal elements are contained in the lithium titanate material; the rare metal elements adopt Zr, Al, La, Ce, Pr, Nd, Sm and Dy or Ho; the contents of the rare metal elements are 0.01-3 wt percent by oxidate; the lithium and titanium molar ratio in the lithium titanate material is 0.7-1.2; and the titanium acid lithium battery cathode material is produced by adopting the processes of material mixing, ball milling and sieving, high-temperature treatment, secondary ball milling, high-temperature heat preservation and the like. The titanium acid lithium battery cathode material containing the rare metal elements is doped with the rare metal elements, improves the quick charging and discharging properties, improves the electrochemical capacity and has excellent cycle performance, good repeatability and high consistency; and furthermore, the titanium acid lithium battery cathode material has the advantages of low raw material cost, short synthesis time, low temperature, low requirements for equipment and simple manufacturing process and is suitable for industrial scale production.

Description

technical field [0001] The invention relates to key materials of lithium batteries, in particular to a lithium titanate battery negative electrode material containing rare metal elements. Background technique [0002] With the development of science and technology, various increasingly popular portable electronic products and developing electric vehicles have put forward higher requirements on the energy density and service life of battery energy and many other aspects. Among all batteries, lithium-ion batteries have the characteristics of high voltage, high specific energy, long cycle life, and no environmental pollution, and have been widely used. [0003] However, there are still some problems in lithium-ion batteries. For example, there are certain safety hazards. The electrode potentials of carbon electrodes and lithium metal are similar. When the battery is overcharged, lithium metal may still be precipitated on the surface of the carbon electrode, forming dendrites an...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/62
CPCY02E60/10
Inventor 王雅和王兴勤王昕吴宁宁葛焕增蔡春华
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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