Lithium titanate material coated with carbon nanotubes and preparation method thereof
A technology of carbon nanotubes and lithium titanate, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., can solve problems such as unsatisfactory use requirements, poor conductivity and rate performance, and achieve good hydrophilicity and Electrochemical performance, improvement of electrochemical performance, effect of contributing to dispersion
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Embodiment 1
[0055] The carbon nanotube-coated lithium titanate material in this embodiment includes lithium titanate particles, and the surface of the lithium titanate particles is coated with a coating layer with a three-dimensional network structure formed by carbon nanotubes; each component The mass percentage is: 99% of lithium titanate and 1% of carbon nanotubes; in the coating layer, the carbon nanotubes are chemically bonded.
[0056] The carbon nanotube is a single-walled carbon nanotube; the diameter of the carbon nanotube is 1-100 nm, and the length is 1-50 μm.
[0057] The preparation method of the carbon nanotube-coated lithium titanate material of the present embodiment comprises the following steps:
[0058] 1) Take the functionalized carbon nanotubes, add them to water, and disperse them uniformly by ultrasonic to obtain a mixture A, the content of the functionalized carbon nanotubes in the mixture A is 0.5 mg / ml;
[0059] 2) Add mixture A obtained in step 1) into ethanol,...
Embodiment 2
[0073] The carbon nanotube-coated lithium titanate material in this embodiment includes lithium titanate particles, and the surface of the lithium titanate particles is coated with a coating layer with a three-dimensional network structure formed by carbon nanotubes; each component The mass percentages are: 90% of lithium titanate and 10% of carbon nanotubes; in the cladding layer, the carbon nanotubes are chemically bonded.
[0074] The carbon nanotubes are double-walled carbon nanotubes; the carbon nanotubes have a diameter of 1-100 nm and a length of 1-50 μm.
[0075] The preparation method of the carbon nanotube-coated lithium titanate material of the present embodiment comprises the following steps:
[0076] 1) Take functionalized carbon nanotubes, add them to water, and ball mill to disperse them evenly to obtain mixture A, the content of functionalized carbon nanotubes in mixture A is 5 mg / ml;
[0077] 2) Add mixture A obtained in step 1) into acetone, the volume ratio...
Embodiment 3
[0090] The carbon nanotube-coated lithium titanate material in this embodiment includes lithium titanate particles, and the surface of the lithium titanate particles is coated with a coating layer with a three-dimensional network structure formed by carbon nanotubes; each component The mass percentages are: lithium titanate 80%, carbon nanotubes 20%; in the coating layer, the carbon nanotubes are chemically bonded.
[0091] The carbon nanotubes are multi-walled carbon nanotubes; the carbon nanotubes have a diameter of 1-100 nm and a length of 1-50 μm.
[0092] The preparation method of the carbon nanotube-coated lithium titanate material of the present embodiment comprises the following steps:
[0093] 1) Take functionalized carbon nanotubes, add them to water, and mechanically stir to disperse them evenly to obtain mixture A, the content of functionalized carbon nanotubes in mixture A is 15 mg / ml;
[0094] 2) Add mixture A obtained in step 1) into isopropanol, the volume rat...
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Abstract
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