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Composite electrode micropowder material doped with humic acid and preparation process thereof

A composite electrode and humic acid technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of LiFePO4 conductivity performance is not obvious, etc.

Inactive Publication Date: 2018-03-23
张彩缘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But only adding Y rare earth elements, for LiFePO 4 The conductivity performance of the improvement is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] First take 0.98 parts of lithium acetate (CH 3 COOLi·2H 2 O, analytically pure), 1 part of ferrous oxalate (FeC 2 o 4 ・2H 2 O, analytically pure), 1 part of ammonium dihydrogen phosphate (NH 4 h 2 PO 4 , analytically pure) and 0.02 parts of Y powder (analytical pure) were mixed and ground in an agate jar, and after grinding for a period of time, the yellow powder turned into porridge, accompanied by the smell of acetic acid. At this time, continue grinding for 0.6 hours, and the reaction The material turns into light yellow powder, and the precursor powder is obtained. Take 5g of precursor powder and mix it evenly with 0.15g of humic acid (analytical pure). Under the condition of inert gas and nitrogen atmosphere at 300°C, the resulting mixture powder is heat-treated for 6h, and then the temperature is raised to 500°C. After constant temperature heat treatment for 10 hours, the obtained product was naturally cooled to room temperature under the protection of nitr...

Embodiment 2

[0015] First take 0.97 parts of lithium acetate (CH 3 COOLi·2H 2 O, analytically pure), 1 part of ferrous oxalate (FeC 2 o 4 ・2H 2 O, analytically pure), 1 part of ammonium dihydrogen phosphate (NH 4 h 2 PO 4 , analytically pure) and 0.03 parts of Y powder (analytical pure) were mixed and ground in an agate jar, and after grinding for a period of time, the yellow powder turned into porridge, accompanied by the smell of acetic acid. At this time, continue grinding for 0.6 hours, and the reaction The material turns into light yellow powder, and the precursor powder is obtained. Take 20g of precursor powder and mix it evenly with 0.6g of humic acid (analytical pure). Under the condition of inert gas and nitrogen atmosphere at 300°C, the resulting mixture powder is heat-treated for 8 hours, and then the temperature is raised to 500°C. After constant temperature heat treatment for 11 hours, the obtained product was naturally cooled to room temperature under the protection of...

Embodiment 3

[0017] First take 0.95 parts of lithium acetate (CH 3 COOLi·2H 2 O, analytically pure), 1 part of ferrous oxalate (FeC 2 o 4 ・2H 2 O, analytically pure), 1 part of ammonium dihydrogen phosphate (NH 4 h 2 PO 4 , analytically pure) and 0.05 parts of Y powder (analytical pure) were mixed and ground in an agate jar, and after grinding for a period of time, the yellow powder turned into a porridge, accompanied by the smell of acetic acid. The material turns into light yellow powder, and the precursor powder is obtained. Take 50g of precursor powder and mix it evenly with 1.5g of humic acid (analytical pure), put the mixture into a quartz glass tube with one end sealed, fill the inside with an appropriate amount of nitrogen, and then use a high-temperature flame to fused the other end of the opening of the quartz tube to seal it , put the sealed quartz glass tube into the water to verify the airtightness, if there are no bubbles, it can be considered that the airtightness is ...

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Abstract

The invention discloses a composite electrode micropowder material doped with humic acid and a process thereof. The method comprises the steps: firstly, proportioning and mixing lithium acetate (a lithium source), ferrous oxalate (an iron source), ammonium dihydrogen phosphate (a phosphate source) and a Y powder according to the atomic ratio of Li1-xYxFePO4, then grinding the mixed raw material with an agate mortar, grinding finely, then adding humic acid, continuing to grind uniformly, collecting the powder, carrying out heat treatment under the protection of an inert gas atmosphere, and thusobtaining the composite electrode micropowder doped with humic acid. The process is simple, the heat treatment temperature is low, and the prepared electrode micropowder material has good performanceand has a good development prospect.

Description

technical field [0001] The invention relates to a lithium ion composite electrode fine powder material and a preparation process thereof, in particular to a lithium ion composite electrode fine powder material doped with humic acid and a preparation process thereof, belonging to the field of electrode materials. Background technique [0002] A lithium-ion battery is a battery that relies on lithium ions to move between the positive and negative electrodes to work and form charge and discharge. When charging, Li+ is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state, and the opposite is true when discharging. At present, the anode materials of lithium-ion batteries mainly include lithium cobaltate, lithium nickelate, lithium manganate and lithium iron phosphate, etc., among which cobalt is poisonous and resources are limited, and the preparation cost is relatively high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5825H01M4/62H01M4/624H01M10/0525Y02E60/10
Inventor 张彩缘
Owner 张彩缘