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Lithium battery electrode material and preparation method thereof

A technology of electrode materials and positive electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems affecting cycle and storage performance, increased contact area, small particles, etc., to improve cycle performance and long-term storage performance, high The effect of stability

Inactive Publication Date: 2014-11-12
周明炯 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods are conducive to obtaining ferric fluoride materials with relatively small particles, they have the disadvantage of small particles, resulting in an increase in the contact area between the particles and the electrolyte, thereby dissolving the iron ions in the ferric fluoride, thereby affecting its circulation. and save performance

Method used

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  • Lithium battery electrode material and preparation method thereof
  • Lithium battery electrode material and preparation method thereof
  • Lithium battery electrode material and preparation method thereof

Examples

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Embodiment 1

[0031] Example 1 Preparation of lithium fluoride-coated iron trifluoride nanomaterials

[0032] Include the following steps:

[0033] 8Kg anhydrous FeCl 3 Put it into a 50L polytetrafluoroethylene reactor, stir continuously, and cool the reactor to -30°C. Under the condition of stirring, the molar ratio of Fe and F is 1:10, and HF gas is introduced at a certain flow rate, and the certain flow rate is 10 g / min. After 12 hours, ventilation was completed. When the aeration is completed, the temperature is raised at a heating rate of 5° / hour, and finally the temperature of the reactor is controlled at 0-5° C. to react while stirring. At the same time, FT-IR is used to analyze whether there is HCl in the generated gas. If no HCl gas is detected, it indicates that the reaction is complete, and the whole process takes about 24 hours. Finally FeF with water of crystallization is obtained 3 Material. The material obtained from the above reaction was placed in an atmosphere furnac...

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Abstract

The invention provides a long-life nano-iron fluoride electrode material and a preparation method thereof. The electrode material is characterized in that the nano-iron fluoride particle is coated with a lithium fluoride nano-layer on the surface, thus reducing direct contact of the electrolyte solution and iron fluoride, and enhancing the cycle life. The preparation method comprises the steps of: putting iron fluoride particles into a soluble lithium salt solution, performing stirring constantly to form a uniformly dispersed slurry; and drying the slurry, then placing the dried slurry in a sealed container, and introducing a fluoride gas to carry out reaction under certain temperature and certain time, thus obtaining the lithium fluoride coated iron fluoride anode material.

Description

technical field [0001] The invention relates to the technical field of energy storage electrode materials, in particular to a long-life ferric fluoride electrode material and a preparation method thereof Background technique [0002] The main constituent materials of lithium-ion batteries include electrolyte, separator materials, positive and negative electrode materials, etc. The positive electrode material occupies a large proportion, because the performance of the positive electrode material directly affects the performance of the lithium-ion battery, and its cost also directly determines the cost of the battery. Currently commercialized cathode materials such as lithium cobaltate, lithium nickelate, lithium iron phosphate and ternary materials. Due to factors such as limited resources and high prices of cobalt-based materials, people are trying to find materials that can replace cobalt-based materials. At present, manganese-based materials with high safety and low cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62
CPCH01M4/366H01M4/582H01M10/0525Y02E60/10
Inventor 周明炯夏永高
Owner 周明炯
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