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 electric energy, and produce problems such as low efficiency, the technical solution provided by the invention is:

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

Embodiment 1

[0035] The preparation of embodiment 1 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 grinding cylinder 1, which is provided with a ball milling medium 2, and two ends of the grinding cylinder are provided with a feed port 11 and a discharge port. 12, the outlet port 12 of the grinding cylinder is connected to the feeding port 11 of the grinding cylinder through a circulating feeding pipe, the lower end of the grinding cylinder is provided with a base supporting the grinding cylinder 1, and a damping spring is arranged between the base and the grinding cylinder 1 3.

[0037] Then adopt ball milling rotary furnace to synthesize, the structure of ball milling rotary furnace 4 is as follows figure 2As shown, it includes a feeding system, a discharging system and a furnace tube 42 . The furnace tube 42 of the ball milling rotary furnace 4 is provided with at least on...

Embodiment 2

[0039] The preparation of embodiment 2 lithium ferrous phosphate

[0040] Vibrating ball mill and ball milling rotary kiln are as described in Example 1.

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

Embodiment 3

[0042] The preparation of embodiment 3 lithium ferrous phosphate

[0043] Vibrating ball mill and ball milling rotary kiln are as described in Example 1.

[0044] Fully mix iron oxide and lithium phosphate in a vibrating ball mill at a molar ratio of 1:1, then add conductive carbon black and mix, and then continuously enter the ball milling rotary furnace under nitrogen protection. During the low-temperature synthesis process, the temperature is controlled at 200~ 400 degrees, heat preservation for 1 to 4 hours, when the temperature in the high temperature zone is controlled at 400 to 800 degrees, heat preservation for 1 to 4 hours, the rotation speed is 1 revolution / minute, and then cooled at room temperature. The product lithium ferrous phosphate is obtained through milling, testing and packaging. In the process of electrochemical test, conductive agent and binder are added to make pole piece, and metal lithium piece is used as the test counter electrode. The tap density o...

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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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