Method for manufacturing electrochemical active material

An active material and electrochemical technology, which is applied in the field of designing a cyclic continuous carbon-free reduction-low temperature synthesis to prepare electrochemical active materials, can solve the problems of incomplete sintering reaction, low production efficiency, large power consumption, etc. Short time, good consistency of finished products, and the effect of reducing energy consumption

Inactive Publication Date: 2010-12-15
NANOCHEM SYST SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the incomplete sintering reaction in the prior art, consume a large amount of elect

Method used

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  • Method for manufacturing electrochemical active material
  • Method for manufacturing electrochemical active material
  • Method for manufacturing electrochemical active material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1 Preparation of lithium iron phosphate

[0036] In this embodiment, a vibrating ball mill is used to pulverize, mix, and circulate materials. The vibrating ball mill includes a mill cylinder 1, in which a ball milling medium 2 is provided, and both ends of the mill cylinder are provided with a feed port 11 and a discharge port. Port 12, the grinding cylinder discharge port 12 is connected to the grinding cylinder feed port 11 through a circulating feed pipe. The lower end of the grinding cylinder is provided with a base supporting the grinding cylinder 1, and a shock-absorbing spring is provided between the base and the grinding cylinder 1. 3.

[0037] Then it is synthesized by a ball mill rotary kiln. The structure of the ball mill rotary kiln 4 is as follows figure 2 As shown, it includes a feeding system, a discharging system and a furnace tube 42. The furnace tube 42 of the ball mill rotary furnace 4 is provided with at least one ball mill heating zone 43 with ...

Example Embodiment

[0039] Example 2 Preparation of lithium iron phosphate

[0040] The vibrating ball mill and the ball mill rotary furnace are as described in Example 1.

[0041] Mix iron oxide, dihydrogen ammonium phosphate and lithium carbonate or lithium hydroxide at a molar ratio of 1:1:1 in a vibrating ball mill, then add conductive carbon black to mix, and continuously enter the ball mill rotary furnace under nitrogen protection. In the low-temperature synthesis process, the temperature is controlled at 200-400 degrees, and the temperature is kept for 1 to 4 hours. When the temperature in the high temperature zone is controlled at 400-800 degrees, the temperature is kept for 1 to 4 hours, and the rotation speed is 1 cycle / minute, and then it is cooled at room temperature. After powdering, testing and packaging, the product lithium iron phosphate is obtained. During the electrochemical test, a conductive agent and a binder are added to make a pole piece, and a metal lithium piece is used for t...

Example Embodiment

[0042] Example 3 Preparation of lithium iron phosphate

[0043] The vibrating ball mill and the ball mill rotary furnace are as described in Example 1.

[0044] The iron oxide and lithium phosphate are fully mixed in a vibrating ball mill at a molar ratio of 1:1, and then conductive carbon black is added to mix, and the material is continuously fed into the ball mill rotary kiln under the protection of nitrogen. During the low-temperature synthesis process, the temperature is controlled at 200~ 400 degrees Celsius, heat preservation for 1 to 4 hours. When the temperature in the high temperature zone is controlled at 400 degrees to 800 degrees Celsius, the temperature is kept for 1 to 4 hours, and the rotation speed is 1 cycle / minute, and then cooled at room temperature. After powdering, testing and packaging, the product lithium iron phosphate is obtained. During the electrochemical test, a conductive agent and a binder are added to make a pole piece, and a metal lithium piece is ...

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Abstract

The invention discloses a method for manufacturing an electrochemical active material. The method is characterized by comprising the following steps of: (1) smashing and mixing ferric salt, lithium salt or phosphor salt compounds in a vibrating ball mill according to the molar ratio of ferrum element to lithium element to phosphor element of 1:1:1; and circulating the operation; and (2) after the uniformly mixing process in the step (1), putting a mixture into a ball milling rotary furnace and sintering the mixture in an inert atmosphere. The method has the characteristics of short processing reaction time, low energy consumption and excellent performance of processed product, simultaneously improves material purity, reduces the emission of carbon dioxide and contributes to environmental protection by adopting a carbon-free processing process.

Description

technical field [0001] The invention relates to a method for manufacturing electrochemically active materials, in particular to design a method for preparing electrochemically active materials by cyclic continuous carbon-free reduction-low temperature synthesis. Background technique [0002] An excellent lithium-ion battery should at least have the following advantages: high and stable operating voltage, high specific energy, high energy density, long cycle life, and no memory effect. The commercial lithium-ion battery launched by SONY in 1990 basically meets the above conditions. Therefore, this lithium-ion battery can be rapidly promoted and become the mainstream product in the secondary battery market. At present, most mobile phones, notebook computers and some other portable electrical devices use lithium-ion batteries as power sources, and the demand for them will continue to grow. In the future, both electric vehicles and large energy storage batteries may use lithium-...

Claims

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Application Information

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IPC IPC(8): H01M4/58C01B25/45B02C17/14
CPCH01M4/5825H01M4/58H01M4/0471Y02E60/122H01M4/1397C01B25/45H01M4/136Y02E60/10
Inventor 董明苏振华
Owner NANOCHEM SYST SUZHOU
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