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Amorphous anode active material, preparation method of electrode using same, secondary battery containing same, and hybrid capacitor

A cathode active material and secondary battery technology, applied in the direction of active material electrodes, hybrid capacitors, hybrid capacitor electrodes, etc., can solve problems such as limited market expansion, and achieve excellent charge and discharge characteristics, high capacity, effective tracking and prediction effects

Inactive Publication Date: 2012-07-18
SEOUL NAT UNIV R&DB FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its storage capacity is about 1 / 10 of that of lithium secondary batteries, which is relatively low, so its market expansion is limited

Method used

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  • Amorphous anode active material, preparation method of electrode using same, secondary battery containing same, and hybrid capacitor
  • Amorphous anode active material, preparation method of electrode using same, secondary battery containing same, and hybrid capacitor
  • Amorphous anode active material, preparation method of electrode using same, secondary battery containing same, and hybrid capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0083] Embodiment 1 (amorphous Li 3 V 2 (PO 4 ) 3 )

[0084] Lithium hydroxide (LiOH·H 2 O) and ammonium vanadate (NH 3 VO 3 ), stir it while maintaining 70°C to dissolve it completely, and then put it into the dissolved ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) and sucrose (sucrose) solution and fully stirred, then dried at a temperature of 80°C. After extruding and granulating the dried material, it was first heat-treated in an argon atmosphere at 300°C for 6 hours, then pulverized and mixed in an agate mortar, and then granulated again, and heated in an argon atmosphere at 600°C. The heat treatment was carried out in an atmosphere for 12 hours. This is because at a temperature lower than 600° C., vanadium cannot be sufficiently reduced, and thus impurities may remain, and the higher the temperature, the stronger the crystallinity. It was confirmed by elemental analysis that Li:V:P:O=5.0:24.8:22.1:48.1 (weight ratio).

Embodiment 2

[0085] Embodiment 2 (amorphous MoO 2 )

[0086] Prepare 2.5 molar concentration of KBH 4 50ml, its pH is 11-12. and prepare dilute aqueous HCl at pH 1 and 0.25 molar K 2 MoO 4 solution. KBH prepared before 4While the solution was stirring, slowly add K 2 MoO 4 solution, at which time the reduction reaction proceeds to form a solid. This was filtered to recover powder. The powder thus prepared was heat-treated at 300 °C in vacuum to synthesize amorphous MoO 2 . If the heat treatment temperature is 500°C, crystals will be formed, so the heat treatment is performed at a temperature of 500°C or lower. It was confirmed by elemental analysis that Mo:O=74.4:25.6 (weight ratio).

Embodiment 3

[0087] Embodiment 3 (amorphous V 2 o 5 )

[0088] Dissolve crystalline V in distilled water and oxalic acid 2 o 5 Then heat it to boil. At this point, additional hydrochloric acid and distilled water were added, and boiling was continued for 20 minutes. The solution was blue, and if this solution was added to ammonia solution and stirred at room temperature for 30 minutes, a precipitate could be obtained. It was filtered and washed with ethanol to remove impurities. The powder thus obtained was vacuum-dried at 100 °C for one hour to prepare amorphous V 2 o 5 . It was confirmed by elemental analysis that V:O=55.0:45.0 (weight ratio).

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Abstract

The present invention relates to an amorphous anode active material, a preparation method of an electrode using the same, a secondary battery containing the same, and a hybrid capacitor, wherein the amorphous anode active material according to the present invention comprises at least one of a metal oxide or a metal phosphate, and the metal oxide or the metal phosphate is amorphous. The metal oxide has the form of MOX (0 < X <= 3), wherein M is at least one of molybdenum (Mo), vanadium (V), scandium (Sc), titanium (Ti), chromium (Cr), yttrium (Y), zirconium (Zr), niobium (Nb) and tungsten (W).; The metal phosphate has the form of AxBy(PO4) (0 <= x =< 2, 0 < y <= 2), wherein A is at least one of lithium (Li), sodium (Na) and potassium (K), and B is at least one of molybdenum (Mo), vanadium (V), scandium (Sc), titanium (Ti), chromium (Cr), yttrium (Y), zirconium (Zr), niobium (Nb) and tungsten (W).; According to the present invention, the storage space of lithium, sodium, and the like and the diffusion velocity of ions thereof are increased by using an amorphous metal oxide or phosphate as an anode active material, thereby remarkably improving the capacity and velocity characteristics of a battery, the charged and discharged state of a finished battery is easily tracked or predicted because a charge / discharge voltage curve having a slope close to a straight line is shown, and compatibility with an anode of a lithium secondary battery, a sodium secondary battery and a hybrid capacitor is expected to be very high because an excellent cycle lifetime is shown.

Description

technical field [0001] The present invention relates to an amorphous cathode active material, an electrode manufacturing method using it, a secondary battery and a hybrid capacitor including the same, and in more detail relates to a method of using amorphous phase metal oxides and phosphates as cathode active materials , so as to increase the storage places of lithium, sodium, etc. and accelerate the diffusion speed of these ions, so as to greatly improve the battery capacity and speed characteristics of amorphous cathode active materials and electrode manufacturing methods using it, secondary batteries and hybrid capacitors containing it . Background technique [0002] Conventional graphite has been widely used as a cathode material for lithium secondary batteries in the past. However, due to the development of the secondary battery market and the demand for power sources for various purposes, graphite-based materials cannot meet the conditions required for capacity and ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/04H01M10/05H01M50/409
CPCH01M4/505H01M4/5825H01G11/04H01M4/622H01M4/525H01M10/054H01M10/052H01M4/485H01G11/50H01M4/1391H01M4/623H01G11/46H01M2004/027Y02E60/122Y02E60/13H01M4/625H01M10/0569H01G11/38H01M4/661H01M10/0568H01M2/16H01G9/058H01M4/131Y10T428/2982Y02E60/10H01M50/409H01M4/48H01M4/04H01M10/05
Inventor 丘埈焕朴京珍金智善抑志宪吴承模
Owner SEOUL NAT UNIV R&DB FOUND
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