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Composite electrode material prepared by adding nano titanium dioxide and process thereof

A composite electrode and preparation process technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems that the application of electrode materials cannot be further improved, and the conductivity performance is only improved.

Inactive Publication Date: 2018-03-23
郑观情
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But single addition of rare earth elements, for LiFePO 4 The improved conductivity properties of the single, LiFePO 4 The application of electrode materials cannot be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] With LiOH as lithium source, Fe(PO 4 ) 3 As an iron source, (NH 4 ) 2 HPO 4 As the source of phosphoric acid, Nd powder is used as the doping raw material for doping Nd, and nano-titanium dioxide powder is used as the doping raw material for doping Ti, according to Li 0.98 Nd 0.02 Fe 0.8 Ti 0.2 PO 4 The atomic proportion of ingredients is 5g of the mixture, and the prepared mixture raw materials are initially mixed and poured into the ball mill jar together, then add an appropriate amount of steel balls and anhydrous alcohol into the ball mill jar as the ball mill medium, then cover the ball mill jar lid and Tighten the screw, and put it into the planetary ball mill for 10 hours of ball milling. After the ball milling, take off the ball milling tank and let it stand for a period of time, open the ball milling tank, take out the alloy powder slurry in the ball milling tank, and spray dry it to obtain the precursor Then the powder was heated to 500°C under the pro...

Embodiment 2

[0014] With LiOH as lithium source, Fe(PO 4 ) 3 As an iron source, (NH 4 ) 2 HPO 4 As the source of phosphoric acid, Nd powder is used as the doping raw material for doping Nd, and nano-titanium dioxide powder is used as the doping raw material for doping Ti, according to Li 0.95 Nd 0.05 Fe 0.7 Ti 0.3 PO 4 20g of the mixture with the atomic ratio of ingredients, mix the prepared mixture raw materials and pour them into the ball milling tank together, then add an appropriate amount of steel balls and anhydrous alcohol ball milling medium into the ball milling tank, then cover the ball milling tank and tighten it After tightening the screw, put it into the planetary ball mill for 12 hours of ball milling. After the ball milling, take off the ball mill tank and let it stand for a period of time, open the ball mill tank, take out the alloy powder slurry in the ball mill tank and spray dry it to obtain the precursor powder, and then heat the powder at high temperature to 55...

Embodiment 3

[0016] With LiOH as lithium source, Fe(PO 4 ) 3 As an iron source, (NH 4 ) 2 HPO 4 As the source of phosphoric acid, Nd powder is used as the doping raw material for doping Nd, and nano-titanium dioxide powder is used as the doping raw material for doping Ti, according to Li 0.9 Nd 0.1 Fe 0.6 Ti 0.4 PO 4 The mixture of 50g of the atomic proportion ingredients is mixed initially, and then poured into the ball milling tank together, and then add an appropriate amount of steel balls and acetone ball milling medium to the ball milling tank, and then cover the ball milling tank and tighten the screws. After tightening, put it into a planetary ball mill for 15 hours of ball milling. After the ball milling, take off the ball milling tank and let it stand for a period of time, open the ball milling tank, take out the alloy micropowder slurry in the ball milling tank and spray dry it to obtain the precursor powder. Then put the precursor powder into a quartz glass tube sealed a...

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Abstract

The invention discloses a composite electrode material prepared by adding nano titanium dioxide and a process thereof. The material is the composite electrode material prepared by taking LiOH as a lithium source, Fe(PO4)3 as an iron source, (NH4)2HPO4 as a phosphate source, a Nd powder as a doping raw material for doping Nd and a nano titanium dioxide powder as a doping raw material for doping Tiaccording to the atomic ratio of Li1-xNdxFe1-yTiyPO4. The process comprises the steps: proportioning according to the atomic ratio firstly, then carrying out ball milling to prepare slurry by a ball milling process, next drying the slurry, then carrying out heat treatment and cooling under the protection of an inert atmosphere, and thus preparing the target product. The method is simple in process, and the properties of the composite electrode material powder are good.

Description

technical field [0001] The invention relates to a lithium-ion composite electrode material and a preparation process thereof, in particular to a titanium-doped lithium-ion composite electrode material and a preparation method thereof, belonging to the field of electrode material processing. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery), which mainly relies on lithium ions to move between the positive and negative electrodes to work. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: when charging, Li+ is deintercalated from the positive electrode, intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state, and the opposite is true during discharge. With LiFePO 4 The representative polyanionic structure phosphate material has attracted extensive attention in the field of lithium-ion electronics...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/364H01M4/5825H01M4/626H01M10/0525Y02E60/10
Inventor 郑观情
Owner 郑观情
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