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Lithium ion battery positive electrode material lithium-enriched doped lithium molybdate and preparation method thereof

A lithium-ion battery, cathode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of complex crystal structure and uncertainty, achieve high specific capacity, reduce defects, and simple and easy preparation methods.

Inactive Publication Date: 2012-01-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the existence of a superlattice-like structure in the lithium-rich cathode material, which contains a variety of cations, the crystal structure is very complex
At present, there is no definite model for the structure of lithium-rich cathode materials, and further exploration of its structure is still needed.

Method used

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  • Lithium ion battery positive electrode material lithium-enriched doped lithium molybdate and preparation method thereof
  • Lithium ion battery positive electrode material lithium-enriched doped lithium molybdate and preparation method thereof
  • Lithium ion battery positive electrode material lithium-enriched doped lithium molybdate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Lithium-rich manganese-doped lithium molybdate Li 2 mn 0.7 Mo 0.3 o 3 (x=0.3) Preparation

[0022] 1, adopt lithium carbonate, molybdenum trioxide, manganese dioxide, active carbon as raw material, the consumption of raw material is Li: Mo: Mn: C=2: 0.3: 0.7: 2 by the molar ratio of raw material, wherein lithium carbonate 14.8 grams, 4.3 grams of molybdenum trioxide, 6.1 grams of manganese dioxide, and 2.4 grams of activated carbon are placed in an agate mortar to grind the raw materials evenly, then the mixture powder is added to 100 g of aqueous solution containing 5 g of polyvinyl alcohol, and stirred for 3 hours to make the mixture Evenly disperse to obtain a mixed solution.

[0023] 2. The temperature of the above mixture was raised to 90° C., stirred and dried for 48 hours to obtain a xerogel.

[0024] 3. Put the above dry gel into an alumina crucible, and heat it in a tubular heating furnace under an argon protective atmosphere. Rapidly raise the ...

Embodiment 2

[0034] Example 2, lithium-rich titanium doped lithium molybdate Li 2 Ti 0.1 Mo 0.9 o 3 (x = 0.9) Preparation

[0035] 1, adopt lithium carbonate, molybdenum trioxide, titanium dioxide, active carbon as raw material, the consumption of raw material is Li: Mo: Ti: C=2: 0.9: 0.1: 2 by the molar ratio of raw material, wherein lithium carbonate 14.8 grams, trioxide 12.96 grams of molybdenum, 0.8 grams of titanium dioxide, and 2.4 grams of activated carbon are placed in an agate mortar to grind the raw materials evenly, then the mixture powder is added to 100 g of aqueous solution containing 6 g of polyvinyl alcohol, stirred for 5 hours, and the mixture is uniformly dispersed to obtain Mixture.

[0036] 2. The temperature of the mixture was raised to 80° C., stirred and dried for 36 hours to obtain a xerogel.

[0037] 3. Put the above dry gel into an alumina crucible, and heat it in a tubular heating furnace under an argon protective atmosphere. Rapidly raise the temperature t...

Embodiment 3

[0040] Embodiment 3, lithium-rich type ruthenium doped lithium molybdate Li 2 Ru 0.4 Mo 0.6 o 3 (x=0.6) Preparation

[0041] 1, adopt lithium carbonate, molybdenum trioxide, ruthenium oxide, active carbon as raw material, the consumption of raw material is Li: Mo: Ru: C=2: 0.6: 0.4: 2 by the mol ratio of the raw material, wherein lithium carbonate 14.8 grams, three 8.63 grams of molybdenum oxide, 5.32 grams of ruthenium dioxide, and 2.4 grams of activated carbon, put the raw materials in an agate mortar and grind them evenly, then add the mixture powder to 100 g of aqueous solution containing 9 g of polyvinyl alcohol, stir for 6 hours, and make the mixture uniform Disperse to obtain a mixed solution.

[0042] 2. The temperature of the above mixture was raised to 85° C., stirred and dried for 24 hours to obtain a xerogel.

[0043] 3. Put the above dry gel into an alumina crucible, and heat it in a tubular heating furnace under an argon protective atmosphere. Rapidly raise...

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Abstract

The invention discloses a positive electrode material lithium-enriched doped lithium molybdate of a lithium ion battery and a preparation method thereof. The chemical structural formula is Li2M1-xMoxO3; the lithium-enriched doped lithium molybdate has favorable electrochemical charge and discharge actions; the discharge capacity is 156mAh / g (the theoretical capacity is 85% of 169.8mAh / g) under the low-current charge and discharge condition (0.1C); the preparation method is simple and feasible, has low cost, has high specific capacity and excellent cycle reversible performance, and has obvious practical value and economic benefit.

Description

technical field [0001] The invention relates to a positive electrode material of a lithium ion battery, in particular to a lithium-rich doped lithium molybdate. Background technique [0002] It has been less than 20 years since the birth of lithium-ion batteries, and its application field has rapidly expanded from the initial mobile communication to various portable electronic products involving people's life and entertainment, military, aerospace, medical treatment, communication, etc. It is developing into large and medium-sized energy storage equipment and power supply. The great commercial success of lithium-ion batteries and the promotion of the development of the above fields are unmatched by any secondary battery. [0003] At present, the most researched and used lithium-ion battery cathode materials are mainly lithium transition metal oxides, including hexagonal layered structure materials (typically such as LiCoO 2 、LiNi 0.5 mn 0.5 o 2 and LiNi 1 / 3 co 1 / 3 mn ...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/1397
CPCY02E60/122Y02E60/10
Inventor 吴晓梅曾小勤张思李斐邹建新丁文江
Owner SHANGHAI JIAO TONG UNIV
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