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Preparation method of LaTi<21>O<38>CoTi<3>Mn<3>O<4> composite nanowires

A nanowire and composite technology, applied in the field of material chemistry, can solve the problems of limiting discharge capacity and rate performance, poor electrical conductivity, etc., and achieve the effect of uniform particle size and high stability

Active Publication Date: 2018-10-12
宁波市大学科技园发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, manganese-based materials are semiconductor materials, and their electrical conductivity is poor when used as lithium battery materials, and factors such as material volume changes during charge and discharge limit their actual discharge capacity and rate performance (Jiang Feng, Manganese-based materials and their composites Preparation and electrochemical performance research [D]. Xiangtan University, 2014, master's degree thesis)

Method used

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  • Preparation method of LaTi&lt;21&gt;O&lt;38&gt;CoTi&lt;3&gt;Mn&lt;3&gt;O&lt;4&gt; composite nanowires
  • Preparation method of LaTi&lt;21&gt;O&lt;38&gt;CoTi&lt;3&gt;Mn&lt;3&gt;O&lt;4&gt; composite nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1.0mmol (0.251g) of cobalt acetate tetrahydrate (C 4 h 6 CoO 4 4H 2 O) and 3.0mmol (0.735g) manganese acetate tetrahydrate (MnC 4 h 6 o 4 4H 2 O) dissolved in 20mL of N,N-dimethylformamide (DMF) and isopropanol mixed solvent (1:1 by volume) and stirred for 0.5h to form solution A; 8.0mL tetrabutyl titanate (C 16 h 36 o 4 Ti) was dissolved in solution A, and 6mL of glacial acetic acid was added, stirred for 0.5h to form solution B; solution B was heated, and 1.0mmol (0.316g) of lanthanum acetate (C 6 h 9 o 6 La), stirred for 0.5h to form a solution C; 3.70g PVP (K-120, polyvinylpyrrolidone) was added to solution C, stirred for 6h to form a clear solution D; the clear solution D was placed at a voltage of 18kV and a receiving area of ​​15cm distance and 0.8mL h -1 Electrospinning is carried out under the flow rate and relative humidity of 35% atmosphere; the obtained electrospinning product is dried at 100°C for 12h; the dried electrospinning product is trans...

Embodiment 2

[0023] Dissolve 1.0 mmol (0.251 g) of cobalt acetate tetrahydrate and 3.0 mmol (0.735 g) of manganese acetate tetrahydrate in 20 mL of a mixed solvent of N,N-dimethylformamide and isopropanol (volume ratio of 1 : 1) stirred in 0.5h to form solution A; 6.0mL tetrabutyl titanate (C 16 h 36 o 4 Ti) was dissolved in solution A, and 6mL of glacial acetic acid was added, stirred for 0.5h to form solution B; solution B was heated, and 1.0mmol (0.316g) of lanthanum acetate (C 6 h 9 o 6 La), stirred for 0.5h to form a solution C; 3.70g PVP (K-120, polyvinylpyrrolidone) was added to solution C, stirred for 6h to form a clear solution D; the clear solution D was placed at a voltage of 21kV and a receiving area of ​​15cm distance and 1.2mL h -1Electrospinning is carried out under the flow rate and relative humidity of 45%; the obtained electrospinning product is dried at 100°C for 12h; the dried electrospinning product is transferred to a muffle furnace, and the Sintered at ℃ for 5h...

Embodiment 3

[0025] Dissolve 0.5 mmol (0.126 g) of cobalt acetate tetrahydrate and 1.5 mmol (0.3675 g) of manganese acetate tetrahydrate in 10 mL of a mixed solvent of N,N-dimethylformamide and isopropanol (volume ratio of 1 : 1) stirred in 0.5h to form solution A; 4.0ml tetrabutyl titanate (C 16 h 36 o 4 Ti) was dissolved in solution A, added 3mL of glacial acetic acid, stirred for 0.5h to form solution B; solution B was heated, and 1.00mmol (0.158g) of lanthanum acetate (C 6 h 9 o 6 La), stirred for 0.5h to form a solution C; 1.85g PVP (K-120, polyvinylpyrrolidone) was added to solution C, stirred for 6h to form a clear solution D; the clear solution D was placed at a voltage of 19kV and a receiving area of ​​15cm distance and 0.9mL h -1 Electrospinning is carried out under the flow rate and relative humidity of 40%; the obtained electrospun product is dried at 100°C for 12h; the dried electrospun product is transferred to a muffle furnace, Sintered at ℃ for 5h to obtain a brown po...

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Abstract

The invention discloses a preparation method of LaTi<21>O<38>CoTi<3>Mn<3>O<4> composite nanowires. According to the invention, a certain amount of tetrabutyl titanate, cobalt acetate tetrahydrate, manganese acetate tetrahydrate and lanthanum acetate hydrate are used as principal raw materials to be dissolved in a mixed solvent of N, N-dimethylformamide and isopropanol of a certain volume by meansof the electrospinning technology; then a suitable amount of polyvinylpyrrolidone is added to obtain a precursor mixture solution; the electrospinning is carried out under certain voltage, flow rate and certain relative humidity atmosphere; then the spinning products is sintered to obtain the LaTi<21>O<38>CoTi<3>Mn<3>O<4> composite nanowires. The composite nanowires prepared by the invention havegood electrochemical properties and can be applied to the electrode materials of lithium ion batteries. In the whole preparation process, the operation is simple, the raw material cost is low, the equipment investment is few, and it is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a LaTi 21 o 38 ·CoTiO 3 ·Mn 3 o 4 Preparation methods of composite nanowires. Background technique [0002] Due to the small particle size and shell structure of nanoparticles, nanomaterials have four effects, namely small size effect, surface and interface effect, quantum size effect, and macroscopic quantum tunneling effect. Therefore, compared with general conventional materials, nanomaterials show some extraordinary phenomena, such as: optical properties, photoelectric catalytic properties, photoelectric conversion properties, electrical properties and magnetic properties. Among all nanomaterials, one-dimensional nanomaterials have excellent performance and potential application prospects in many fields such as optics, electricity, magnetism, catalysis, and sensors due to their atomic-level structure and 1D morphology. At the same time, one-dimensional nano...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/50H01M4/52H01M10/0525B82Y40/00
CPCB82Y40/00H01M4/362H01M4/483H01M4/502H01M4/523H01M10/0525Y02E60/10
Inventor 王超李星
Owner 宁波市大学科技园发展有限公司
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