Method for preparing titanium dioxide array film on flexible metallic matrix and application of method in lithium ion battery

A flexible metal and titanium dioxide technology, applied in alkaline battery electrodes, metal material coating process, coating, etc., can solve the problems of film substrate selection restrictions, achieve stable charge-discharge cycle performance, mild preparation conditions, and avoid corrosion Effect

Inactive Publication Date: 2011-08-10
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the arrays prepared by the above method are usually subjected to high temperature heat treatment above 400°C to crystallize the film, or the reaction envir

Method used

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  • Method for preparing titanium dioxide array film on flexible metallic matrix and application of method in lithium ion battery
  • Method for preparing titanium dioxide array film on flexible metallic matrix and application of method in lithium ion battery
  • Method for preparing titanium dioxide array film on flexible metallic matrix and application of method in lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] Example 1 Preparation of titanium dioxide array film on copper foil

[0047] Step 1: Clean the copper foil

[0048] Dip the copper foil into 0.5M sulfuric acid (H 2 SO 4 ) Ultrasonic cleaning in the lotion for 5 minutes, and then immersed in acetone (C 3 H 6 O) After 10 minutes of ultrasonic cleaning, take it out and rinse with deionized water to remove impurities on the surface of the substrate to obtain a clean substrate;

[0049] Step 2: Make the first mixture

[0050] The titanium trichloride (or titanium tetrachloride (TiCl 4 )) Dissolve in saturated sodium chloride (NaCl) solution to form a first mixed solution;

[0051] Dosage: The molar concentration of titanium salt in the first mixed solution is 0.1M;

[0052] Step 3: Make the second mixture

[0053] Add urea ((NH 2 ) 2 CO) forming a second mixed liquid;

[0054] Dosage: The mass concentration of urea in the second mixed solution is 12g / L;

[0055] In the present invention, urea ((NH 2 ) 2 CO) is used as a nucleation promot...

Example Embodiment

[0063] Example 2 Preparation of titanium dioxide array film on titanium foil

[0064] Step 1: Clean the titanium foil

[0065] Immerse the titanium foil in 0.5M sulfuric acid (H 2 SO 4 ) Ultrasonic cleaning in the lotion for 10 minutes, then immersed in acetone (C 3 H 6 O) After ultrasonic cleaning for 8 minutes, take it out and rinse with deionized water to remove impurities on the surface of the titanium foil to obtain a clean titanium foil;

[0066] Step 2: Make the first mixture

[0067] Titanium oxysulfate (TiOSO 4 ) Dissolve in saturated sodium chloride (NaCl) solution to form a first mixed solution;

[0068] Dosage: The molar concentration of titanium salt in the first mixed solution is 0.2M;

[0069] Step 3: Make the second mixture

[0070] Add urea ((NH 2 ) 2 CO) forming a second mixed liquid;

[0071] Dosage: The mass concentration of urea in the second mixed solution is 8g / L;

[0072] In the present invention, urea ((NH 2 ) 2 CO) is used as a nucleation promoter and metal corrosi...

Example Embodiment

[0079] Example 3 Preparation of titanium dioxide array film on stainless steel sheet

[0080] Step 1: Clean the stainless steel sheet

[0081] Immerse the stainless steel sheet in 0.5M sulfuric acid (H 2 SO 4 ) Ultrasonic cleaning in the lotion for 6 minutes, then immersed in acetone (C 3 H 6 O) After 15 minutes of ultrasonic cleaning, take it out and rinse with deionized water to remove impurities on the surface of the stainless steel sheet to obtain a clean stainless steel sheet;

[0082] Stainless steel sheet size (length, width and thickness): 10cm×3cm×0.2cm

[0083] Step 2: Make the first mixture

[0084] The titanium sulfate (Ti(SO 4 ) 2 ) Dissolve in saturated sodium chloride (NaCl) solution to form a first mixed solution;

[0085] Dosage: The molar concentration of titanium salt in the first mixed solution is 0.15M;

[0086] Step 3: Make the second mixture

[0087] Add urea ((NH 2 ) 2 CO) forming a second mixed liquid;

[0088] Dosage: The mass concentration of urea in the second mi...

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Abstract

The invention discloses a method for preparing a titanium dioxide array film on a flexible metallic matrix and application of the method in a lithium ion battery. The method comprises the following steps of: soaking the matrix into sulfuric acid cleaning solution to perform ultrasonic cleaning, then soaking the matrix into acetone to perform ultrasonic cleaning, and finally flushing the matrix by using deionized water; adding titanium salt-containing solution and urea into saturated sodium chloride solution to prepare reaction solution, and putting the reaction solution into a stainless steel autoclave with a Teflon lining; soaking the cleaned matrix into the reaction solution, and performing reaction for 2 to 5 hours at the temperature of between 150 and 180 DEG C; sequentially flushing the film obtained after reaction together with the matrix by using sulfuric acid cleaning solution, deionized water and anhydrous ethanol; and performing vacuum drying for 10 to 15 hours at the temperature of between 60 and 100 DEG C to prepare an electrode material. The titanium dioxide nano-rod array film is prepared on the copper/titanium matrix by one-step molding according to the method to form an electrode used for the lithium ion battery; the method is simple, feasible and low in cost; and the film has regular size arrangement, ideal crystallization and large specific surface area, and shows good multiplying power performance on lithium ion intercalation and deintercalation.

Description

technical field [0001] The present invention relates to a kind of method for preparing titanium dioxide array thin film, more particularly, refers to a kind of method for preparing titanium dioxide array thin film on metal substrate (copper or titanium metal), and the electrode prepared by adopting the method of the present invention is used in lithium ion battery on the application. Background technique [0002] One of the key factors restricting the overall performance of lithium-ion battery materials is the negative electrode material. At present, the negative electrode materials used in commercial lithium-ion batteries are almost all carbon / graphite materials. The electrode potential of carbon is very close to that of metal lithium. When the battery is overcharged, metal lithium may precipitate on the surface of the carbon electrode to form dendrites, causing Security issues. At the same time, the structure of the carbon material will be damaged during the repeated int...

Claims

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Application Information

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IPC IPC(8): C23C26/00H01M4/26
CPCY02E60/124Y02E60/10
Inventor 张世超刘冠娆
Owner BEIHANG UNIV
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