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Nanorod rutile TiO2 mesocrystalline and preparation method and application thereof

A nano-rod-like, mesogenic technology, applied in the field of battery materials, can solve problems such as safety hazards, metal lithium deposition, low theoretical capacity, etc., and achieve the effects of simple operation, high specific capacity and high purity

Inactive Publication Date: 2013-04-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current commercial anode materials are mainly graphite, and some Li 4 Ti 5 o 12 , the surface of graphite may cause the deposition of metal lithium during the charge and discharge process, which has certain safety hazards
And Li 4 Ti 5 o 12 There is also a low theoretical capacity (175 mAhg -1 )The problem

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  • Nanorod rutile TiO2 mesocrystalline and preparation method and application thereof
  • Nanorod rutile TiO2 mesocrystalline and preparation method and application thereof

Examples

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Embodiment 1

[0014] A nanorod-shaped rutile TiO 2 The steps of the preparation method of the mesogen include: mixing 0.5 g of titanium dioxide powder with 40 ml of potassium hydroxide solution with a concentration of 10 mol / L, reacting at 160°C for 96 hours, washing the reactant with 0.05 mol / L of dilute nitric acid, and taking 0.1 g Dispersed in 40 mL concentration of 1 mol / L nitric acid solution and stirred for 5 days, then centrifuged and dried to obtain the nanorod-shaped rutile TiO 2 mesomorph. The prepared mesogen has a length of 200-300nm and a diameter of 50-80nm.

[0015] Nanorod-shaped rutile TiO 2 The application of mesogens is to combine nanorod-shaped rutile TiO 2 Mesogens are used in lithium batteries. According to the mass ratio, the rutile TiO 2 Mesogen: polyvinylidene fluoride: acetylene black = 70:5:15 mixed and ground and evenly coated on 0.25 cm 2 The copper sheet is used as the positive electrode, the negative electrode is lithium metal, and the electrolyte is 1M...

Embodiment 2

[0017] A nanorod-shaped rutile TiO 2 The steps of the preparation method of the mesogen include: mixing 1.5 grams of titanium dioxide powder with 50 milliliters of 20 mol / liter potassium hydroxide solution, reacting at 200 ° C for 48 hours, and washing the reactant with 0.1 mol / liter of dilute nitric acid, taking 0.5 grams of Disperse in 100 mL concentration of 3 mol / liter nitric acid solution and stir for 15 days, then obtain the nanorod-shaped rutile TiO after centrifugation and drying 2 mesomorph. The prepared mesogen has a length of 200-300nm and a diameter of 50-80nm.

[0018] Nanorod-shaped rutile TiO 2 The application of mesogens is to combine nanorod-shaped rutile TiO 2 Mesogens are used in lithium batteries. According to the mass ratio, the rutile TiO 2 Mesogen: polyvinylidene fluoride: acetylene black = 75: 10: 20 mixed and ground and evenly coated on 0.25 cm 2 The copper sheet is used as the positive electrode, the negative electrode is lithium metal, and the ...

Embodiment 3

[0020] A nanorod-shaped rutile TiO 2 The steps of the preparation method of the mesogen include: mixing 1.0 g of titanium dioxide powder with 45 ml of potassium hydroxide solution with a concentration of 15 mol / L, reacting at 180°C for 72 hours, washing the reactant with 0.1 mol / L of dilute nitric acid, and taking 0.3 g Dispersed in 60 mL concentration of 2 mol / L nitric acid solution and stirred for 10 days, then centrifuged and dried to obtain the nanorod-shaped rutile TiO 2 mesomorph. The prepared mesogen has a length of 200-300nm and a diameter of 50-80nm.

[0021] Nanorod-shaped rutile TiO 2 The application of mesogens is to combine nanorod-shaped rutile TiO 2 Mesogens are used in lithium batteries. According to the mass ratio, the rutile TiO 2 Mesogen: polyvinylidene fluoride: acetylene black = 72:8:19 mixed and ground and evenly coated on 0.25 cm 2 The copper sheet is used as the positive electrode, the negative electrode is lithium metal, and the electrolyte is 1M...

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Abstract

The invention relates to a nanorod rutile TiO2 mesocrystalline and a preparation method and application thereof. The nanorod rutile TiO2 mesocrystalline consists of 3nm to 5nm superfine nanowires. The length of the nanorod rutile TiO2 mesocrystalline is 200nm to 300nm. The diameter of the nanorod rutile TiO2 mesocrystalline is 50nm to 80nm. The invention provides the preparation method for the high-purity nanorod rutile TiO2 mesocrystalline for the first time. The nanorod rutile TiO2 mesocrystalline has the advantages of convenience in operation, low cost, high purity and excellent performance, and can be synthesized in a large scale. By using the high-purity nanorod rutile TiO2 mesocrystalline as the anode material of a lithium battery, according to the results, the cyclic stability is excellent and the specific capacity is higher. After 80 times of cycles under current density being 1C, the specific capacity can still reach 170mAhg<-1>.

Description

technical field [0001] The invention belongs to the field of battery materials, and more specifically relates to a nanorod-shaped rutile TiO 2 Mesogens and their preparation methods and applications. Background technique [0002] Lithium-ion batteries have significant advantages such as high voltage, high capacity, and long cycle life. They have been widely used in mobile electronic equipment, defense industry, electric vehicles and other fields. Among them, due to the needs of energy and environmental protection, electric vehicles have become the most concerned industry in the field of new energy. Therefore, the development of high-performance lithium-ion power batteries has become one of the hottest research fields in recent years. At present, cathode materials for power batteries such as spinel lithium manganese oxide and lithium iron phosphate have been extensively studied and great progress has been made. However, the current commercial anode materials are mainly gra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047B82Y40/00
Inventor 魏明灯洪振生
Owner FUZHOU UNIV
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