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Lithium aluminum titanium phosphate preparation method

A technology of titanium aluminum lithium phosphate and aluminum salt, which is applied in chemical instruments and methods, phosphorus compounds, nanotechnology for materials and surface science, etc., can solve the problems of low product purity, high energy consumption, and high cost, and achieve a solution The effect of low product purity, cheap raw materials and simple process

Active Publication Date: 2016-02-17
SHANDONG YUHUANG NEW ENERGY TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the common methods for synthesizing lithium titanium aluminum phosphate mainly include solid-phase method and sol-gel method. The solid-phase method has a simple process, but long-term high-temperature calcination leads to high energy consumption, and the product purity is low due to the volatilization of lithium salt at high temperature. Low, the sol-gel method uses expensive alkoxide, the cost is very high, only suitable for laboratory research

Method used

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  • Lithium aluminum titanium phosphate preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Weigh 0.8g of titanium dioxide, 0.1g of PVDF and 0.1g of acetylene black, grind them in a mortar for half an hour and mix them well, take 0.2g of the mixture and put it into a mold, and press it under 20MPa pressure for 1 minute to form a tablet. Use the pressed sheet as the positive electrode, select the CR2032 button battery case, assemble the battery in the order of the negative electrode case, spring sheet, gasket, lithium sheet, diaphragm, positive electrode, and positive electrode case, add 5 drops of lithium-ion battery electrolyte, and seal it with a sealing machine Prepare button cells. Put the prepared button battery on the battery tester, and discharge it at a constant current of 0.05C to a capacity of 40.99mAh. Take out the pressed tablet after lithium intercalation, dry it, grind and mix it with 0.018g of alumina and 0.406g of ammonium dihydrogen phosphate, pre-calcine in a muffle furnace at 700°C for 10 hours, and then sinter at 900°C for 4 hours to obtain...

Embodiment 2

[0025] Weigh 9g of titanium dioxide, 0.5g of PVDF and 0.5g of SuperP, put them into a 100ml ball mill jar with a ball-to-material ratio of 3:1, grind for 2 hours and mix well, take 0.2g of the mixture and put it into a mold, and press it under 20MPa for 1 minute to form a tablet. Use the pressed sheet as the positive electrode, select the CR2032 button battery case, assemble the battery in the order of the negative electrode case, spring sheet, gasket, lithium sheet, diaphragm, positive electrode, and positive electrode case, add 5 drops of lithium-ion battery electrolyte, and seal it with a sealing machine Prepare button cells. Put the prepared button battery on a battery tester, and discharge it at a constant current of 0.05C to a capacity of 46.11mAh. Take out the pressed tablet after lithium intercalation, dry it, grind and mix it with 0.02g of alumina and 0.487g of ammonium dihydrogen phosphate, pre-calcine in a muffle furnace at 550°C for 10 hours, and then sinter at 110...

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Abstract

The present invention belongs to the technical field of lithium-ion batteries, and specifically discloses a lithium aluminum titanium phosphate preparation method. First, titanium dioxide is embedded into an appropriate amount of lithium ions by electrochemical method, according to the ratio of lithium aluminum titanium phosphate, aluminum and phosphor salts are added to form a homogeneous mixture, and the homogeneous mixture is annealed to obtain a LATP (lithium aluminum titanium phosphate) solid electrolyte. The raw materials are cheaper, the process is simple, high purity lithium aluminum titanium phosphate can be obtained by two steps of electrochemical and high temperature treatment, the ratio of lithium aluminum titanium phosphate can be precisely controlled, and the lower product purity problem caused by volatilization of a lithium salt at high temperature in general solid-phase method can be solved.

Description

(1) Technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a preparation method of lithium titanium aluminum phosphate. (2) Background technology [0002] The popularity of new energy vehicles can reduce environmental pollution, among which power batteries are the key factor. Power batteries usually use liquid electrolytes, which may cause fire or explosion under abuse, posing safety hazards. All-solid batteries using solid electrolytes do not use flammable liquid electrolytes, and their safety is greatly improved. At the same time, all-solid batteries have more storage capacity and higher output power, but the low ionic conductivity of solid electrolytes hinders all-solid batteries. practical. [0003] In the solid electrolyte, lithium titanium aluminum phosphate Li 1+x al x Ti 2-x (PO 4 ) 3 (LATP) room temperature ionic conductivity up to 10 -3 S / cm, which is close to the level of commercial electrolytes, is of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/1397H01M10/0525C01B25/45B82Y30/00
CPCB82Y30/00C01B25/45H01M4/1397H01M4/5825H01M10/0525Y02E60/10
Inventor 陈建伟赵成龙王龙王瑛张庆朋李丽于文倩王超武
Owner SHANDONG YUHUANG NEW ENERGY TECH
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