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Preparation method of lithium-intercalated molybdenum trioxide electrode material

A technology of molybdenum trioxide and electrode materials, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of electrode materials such as cumbersome steps, long time consumption, and high cost, and achieve excellent cycle performance, simple and easy raw materials, and uniform size distribution Effect

Inactive Publication Date: 2012-09-26
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method to prepare electrode materials has cumbersome steps, takes a long time, and the cost of preparation is relatively high.

Method used

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  • Preparation method of lithium-intercalated molybdenum trioxide electrode material
  • Preparation method of lithium-intercalated molybdenum trioxide electrode material
  • Preparation method of lithium-intercalated molybdenum trioxide electrode material

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Effect test

Embodiment 1

[0014] The preparation method of the lithium intercalation molybdenum trioxide electrode material of the present embodiment is as follows:

[0015] Weigh 36g of lithium molybdate and pour it into a beaker, add appropriate deionized water to prepare 180mL of a saturated solution of lithium molybdate; then put the beaker into an ultrasonic cleaner, ultrasonically clean it at 25°C for 10min, and use the prepared A good 2.2mol / L nitric acid solution adjusts the pH value of the saturated solution to 0.5, white precipitates appear, stir, then place it in the autoclave, then put the autoclave into the electric heating constant temperature blast drying box, set The temperature is 170°C, and the hydrothermal reaction time is 4h; after the constant temperature is over, let the reactor cool down naturally, and the obtained product is washed with 33wt% nitric acid, absolute ethanol and deionized water; the washed sample is heated at 60°C Dry at constant temperature for 6 hours to obtain n...

Embodiment 2

[0017] The preparation method of the lithium intercalation molybdenum trioxide electrode material of the present embodiment is as follows:

[0018] Weigh 40g of lithium molybdate and pour it into a beaker, add appropriate deionized water to prepare 200mL of a saturated solution of lithium molybdate; then put the beaker into an ultrasonic cleaner, ultrasonically clean it at 25°C for 10min, and use the prepared A good 2.2mol / L nitric acid solution adjusts the pH value of the saturated solution to 1.0, white precipitates appear, stir, then place it in the autoclave, then put the autoclave into the electric heating constant temperature blast drying box, set The temperature is 180°C, and the hydrothermal reaction time is 10h; after the constant temperature is over, let the reactor cool down naturally, and the obtained product is washed with 33wt% nitric acid, absolute ethanol and deionized water; the washed sample is heated at 60°C Dry at constant temperature for 6 hours to obtain ...

Embodiment 3

[0020] The preparation method of the lithium intercalation molybdenum trioxide electrode material of the present embodiment is as follows:

[0021] Weigh 50g of lithium molybdate and pour it into a beaker, add appropriate deionized water to prepare 250mL of a saturated solution of lithium molybdate; then put the beaker into an ultrasonic cleaner, ultrasonically clean it at 25°C for 10min, and use the prepared A good 2.2mol / L nitric acid solution adjusts the pH value of the saturated solution to 2.0, white precipitates appear, stir, then place it in the autoclave, then put the autoclave into the electric heating constant temperature blast drying box, set The temperature was 175°C, and the hydrothermal reaction time was 20h; after the constant temperature was over, the reactor was allowed to cool naturally, and the resulting product was washed with 33wt% nitric acid, absolute ethanol and deionized water; the washed samples were heated at 60°C Drying at a constant temperature for...

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Abstract

The invention discloses a preparation method of a lithium-intercalated molybdenum trioxide electrode material, which comprises the following steps: adding de-ionized water to lithium molybdate to prepare a lithium molybdate water solution; regulating the pH value of the solution to 0.5-3.0 until white precipitates appear; then, carrying out hydrothermal reaction at 170-180 DEG C for 4-40 hours; and separating, and drying to obtain the lithium-intercalated molybdenum trioxide electrode material. By using the lithium molybdate (Li2MoO4) as the raw material to prepare the lithium-intercalated molybdenum trioxide electrode material through a one-step hydrothermal reaction method, the preparation method is simple and easy to implement, the used raw material is simple and easy to control, and the preparation cost is greatly lowered. By using the lithium-intercalated molybdenum trioxide battery material prepared by the invention in case of 100 mA / g discharging current, the first discharging specific capacity is more than or equal to 300 mA.h / g, and the discharging specific capacity is more than or equal to 250 mA.h / g after 10 weeks of cycling, there ensuring that the capacity conservation rate reaches 85.5% or above. Thus, the lithium-intercalated molybdenum trioxide battery material has fine cycle performance, thereby having wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of a lithium intercalation molybdenum trioxide electrode material, belonging to the technical field of preparation of lithium battery materials. Background technique [0002] Lithium-ion secondary battery is a newly developed green energy in the 1990s. It is favored by the world for its high reversible capacity, high voltage, high cycle performance and high energy density. It is called the leading power source in the 21st century. . A lithium-ion battery is a secondary battery composed of two compounds that can reversibly intercalate and deintercalate lithium ions as positive and negative electrodes. When charging, lithium ions are deintercalated from the positive electrode and intercalated in the negative electrode, and vice versa during discharge. Therefore, an electrode is required to be in a lithium-intercalated state before assembly. Generally speaking, a lithium-intercalating transition metal oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485
CPCY02E60/122Y02E60/10
Inventor 李继文魏世忠张国赏徐流杰马向东宫方方马琰华赵晶晶
Owner HENAN UNIV OF SCI & TECH
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