Composite oxide electrode material and producing method thereof, and mixed super capacitor

A composite oxide and electrode material technology, which is applied in the manufacture of electrolytic capacitors, capacitors, electrodes, etc., can solve the problems of capacity attenuation and achieve the effects of small capacity attenuation, good cycle performance, and stable charge and discharge cycles

Active Publication Date: 2005-09-28
SICHUAN INDIGO TECH CO LTD
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  • Abstract
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Problems solved by technology

However, the device can only work at a charge-discharge current of C / 3 rate, and at a higher charge-discharge rate, a large capacity attenuation will occur, such as the capacity at 10C current remains less than 60% of that at 1C current
[0008] Li 2 Ti 3 o 7 Composite oxides, in which the valence states of lithium and titanium are +1 and +4 respectively, and the atomic number ratio of the two is about 2:3. It belongs to the orthorhombic crystal system and is a kind of 2 The orthorhombite structure of [M.E.A.Dompablo, A.Várez, F.García- lvarado.Materials Research Bulletin, 1997, 32:993], has the ability of chemical lithium intercalation and electrochemical lithium intercalation; but so far, there is no report on the application of this material in the field of supercapacitors

Method used

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  • Composite oxide electrode material and producing method thereof, and mixed super capacitor
  • Composite oxide electrode material and producing method thereof, and mixed super capacitor
  • Composite oxide electrode material and producing method thereof, and mixed super capacitor

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Embodiment 1

[0035] The preparation of embodiment 1 composite oxide electrode material

[0036] With Li 2 CO 3 , Anatase TiO 2 According to the ratio of the amount of Li and Ti being 2:3, add it into the ball mill jar equipped with zirconia balls, and use the mixed solution of deionized water, acetone and ethanol as the volume ratio of 1:2.5:3 as the dispersion medium, rotate the ball mill at a rate of 750 rpm for 6 hours, and spray-dry the obtained mixed slurry at 75°C, heat-treat the obtained powder in a muffle furnace at a high temperature of 950±50°C for 14 hours, and obtain a composite oxide electrode after cooling Material. X-ray powder diffraction analysis was carried out to this material, the instrument used is Japan Rigaku D / MAX 2400 diffractometer, test condition is Cukα, 40kV, and the diffraction pattern sees figure 1 . The intensity of each peak reflects the characteristics of the space group Pbnm very well. The parameters of the lattice unit are a=5.07, b=9.53, c=2.94,...

Embodiment 2

[0037] Preparation of embodiment 2 composite oxide electrode material

[0038] The material preparation method of this embodiment is basically the same as that described in Example 1, the difference is that LiOH·H 2 O and anatase TiO 2 The dispersion medium is polyacrylic acid with an average molecular weight of 850. After rotary ball milling, the slurry is dried in an oven at 80°C to form a bulk precursor. The precursor is preformed in an air atmosphere in a muffle furnace at 400°C Heat treatment, when the color turns white and no gas is released, raise the temperature to 950±50°C for 14 hours, and obtain a composite oxide electrode material after cooling.

Embodiment 3

[0039] Preparation of embodiment 3 composite oxide electrode material

[0040] The material preparation method of this embodiment is the same as 1, and its difference is to increase Fe in the raw material 2 o 3 , where Li 2 CO 3 , Anatase TiO 2 , Fe 2 o 3 The amount of the three compounds is 2:2.75:0.25 with the ratio of Li, Ti, Fe.

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Abstract

A composite oxide electrode material is composite oxide of Li2Ti3O7 prepared from main metal elements of Li and Ti under simple and easy operated process, the composite oxide of Li2Ti3O7 is orthorhombic structure and specific capacity of the composite oxide is 140mAh /g. The mixed super capacitor made of this composite oxide has high specific capacity and excellent cyclic property.

Description

technical field [0001] The present invention relates to a kind of composite oxide electrode, specifically, a kind of lithium, titanium composite oxide Li 2 Ti 3 o 7 A composite oxide electrode as an electrode material, and a hybrid supercapacitor using the electrode as an anode active material. Background technique [0002] In recent years, hybrid electric vehicles, as a new type of environmentally friendly means of transportation, have gradually become one of the key projects of scientific research departments in various countries. As a power supply system capable of supplying electric vehicles or other high-power electrical equipment, the following basic requirements must be met: (1) high energy density to ensure the continuous energy supply of the vehicle for a long time and long distance; (2) high power Density, used to provide the high energy required by the car at the moment of starting, accelerating, etc.; (3) Long cycle life, to ensure that the car power supply is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/042H01M4/02H01M4/04H01M10/00H01M14/00
CPCY02E60/12Y02E60/13Y02E60/10
Inventor 邓正华陈方刘力侯敏李仁贵
Owner SICHUAN INDIGO TECH CO LTD
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