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Anode material for lithium ion batteries and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, which can be applied to battery electrodes, secondary batteries, circuits, etc., and can solve the problems of poor high-rate performance of negative electrode materials

Active Publication Date: 2017-04-26
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Na 2 Li 2 Ti 6 o 14 The large rate performance of negative electrode materials is poor

Method used

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  • Anode material for lithium ion batteries and preparation method thereof
  • Anode material for lithium ion batteries and preparation method thereof
  • Anode material for lithium ion batteries and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh sodium chloride (1.4040g, 0.024mol), barium chloride (2.4987g, 0.012mol), strontium chloride (3.8041g, 0.024mol), lithium nitrate (6.6192g, 0.096mol), amorphous titanium dioxide (23.0014 g, 0.288mol) in an agate ball mill jar, use methanol as a solvent, ball mill for 5 hours, put the ground mixture into an oven at 70°C and dry for 20 hours, put the dried material in an agate mortar and grind it thoroughly, Put it in a muffle furnace to raise the temperature to 500°C at a heating rate of 1°C / min, and then heat it up to 1000°C at a heating rate of 4°C / min for 6 hours, and then heat it up to 1000°C at a heating rate of 4°C / min. material; its purity was determined by powder diffraction (XRD), as figure 1 Shown; Observe the morphology of described composite material with scanning electron microscope (SEM), as figure 2 As shown; Assemble the simulated battery in a glove box filled with argon, and measure its electrochemical performance, such as image 3 shown.

Embodiment 2

[0027] Weigh sodium acetate trihydrate (0.8165g, 0.006mol), barium nitrate (0.7507g, 0.003mol), strontium nitrate (1.2698g, 0.006mol), lithium carbonate (1.7734g, 0.024mol), anatase titanium dioxide ( 1.4040g, 0.072mol) in an agate ball mill jar, use ethanol as a solvent, ball mill for 10 hours, put the ground mixture in an oven at 80°C for 15 hours, put the dried material in an agate mortar and grind it thoroughly , placed in a muffle furnace to raise the temperature to 600°C at a heating rate of 5°C / min, and then heat it up to 800°C at a heating rate of 10°C / min for 4 hours, and then heat it up to 800°C at a heating rate of 10°C / min. The composite material; determine its purity by measuring powder diffraction (XRD); observe the morphology of the composite material with a scanning electron microscope (SEM); assemble a simulated battery in a glove box filled with argon, and measure its electrochemical performance.

Embodiment 3

[0029]Weigh sodium carbonate (1.2720g, 0.012mol), barium carbonate (1.1820g, 0.006mol), strontium nitrate (1.26982.5396g, 0.012mol), lithium chloride (2.0754g, 0.048mol), rutile titanium dioxide (11.5012g, 0.144mol) in an agate ball mill jar, use propanol as a solvent, ball mill for 15 hours, put the ground mixture in an oven at 90°C and dry for 10 hours, put the dried material in an agate mortar and grind it thoroughly, put In the muffle furnace, the temperature was raised to 800°C at a heating rate of 10°C / min, and then the temperature was raised to 900°C at a heating rate of 1°C / min for 1 hour, and the temperature was raised to 900°C at a heating rate of 1°C / min. Composite material; determine its purity by measuring powder diffraction (XRD); observe the morphology of the composite material with a scanning electron microscope (SEM); assemble a simulated battery in a glove box filled with argon, and measure its electrochemical performance.

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Abstract

The invention discloses an anode material for lithium ion batteries and a preparation method of the anode material. A sodium salt, a barium salt, a strontium salt, a lithium salt and a titanium salt are mixed in proportion, and the novel material for the lithium ion batteries is prepared through ball-milling, drying, grinding and sintering synthesis; the chemical formula of the anode material is Na0.5Ba0.25Sr0.5Li2Ti6O14, and the electrochemical performance and lithium storage performance of the cathode material are researched. Electrochemical experiments prove that the composite material prepared through the method has excellent physical and chemical properties, and has wide application prospect as the anode material for the lithium ion batteries. In the whole preparation process, the synthetic method is simple and easy to operate, the material preparation cost is low, the equipment investment is low, and the anode material is applicable for volume production.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a novel lithium ion battery negative electrode material and a preparation method thereof, in particular to doping barium and strontium ions on the sodium titanate lithium battery negative electrode material and a preparation method thereof. Background technique [0002] Due to its outstanding advantages such as high working voltage, light weight, large specific energy, small self-discharge, long cycle life, no memory effect, and no environmental pollution, lithium-ion batteries have become ideal power sources for small and lightweight electronic devices, and are also high-energy vehicles in the future. The preferred power source for power batteries. The negative electrode material is one of the main components of the lithium-ion battery, and the performance of the negative electrode directly affects the performance of the lithium-ion battery. Na 2 Li 2 Ti 6 o 14...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M10/0525C04B35/462
CPCC04B35/462C04B2235/3201C04B2235/3203C04B2235/3213C04B2235/3215H01M4/485H01M10/0525Y02E60/10
Inventor 孙陈李星
Owner NINGBO UNIV
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