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Composite positive pole material, battery-super electric capacity energy storage means and preparation method

A composite positive electrode material and composite positive electrode technology, applied in the field of batteries and capacitors, can solve the problems of affecting energy density and life, small contact area of ​​materials, low mixing uniformity, etc., and achieve high energy density, good performance, and high power density. Effect

Active Publication Date: 2009-09-30
CHENGDU ZHONGKE LAIFANG POWER SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the positive electrode of this patent application is the active ingredient LiMn 2 o 4 It is obtained by physical mixing (mechanical mixing) with activated carbon, resulting in low mixing uniformity between materials, small contact area between materials, and the positive electrode material is in a multi-phase state, which affects its energy density and life

Method used

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  • Composite positive pole material, battery-super electric capacity energy storage means and preparation method
  • Composite positive pole material, battery-super electric capacity energy storage means and preparation method
  • Composite positive pole material, battery-super electric capacity energy storage means and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Preparation of LiFePO by solid phase synthesis 4 / AC composite cathode material:

[0028] Take Li 2 CO 3 0.924g, ferrous oxalate FeC 2 O 4 ·2H 2 O 4.498g and (NH 4 ) 2 HPO 4 3. 302g is mixed thoroughly, then 15g of activated carbon is added to grind uniformly, and the mixture is ground into a uniform slurry in 100mL of acetone solvent, and then preheated at 350°C for 12h under an inert atmosphere, and the precursor is taken out and ground evenly and then at 750°C Roasting for 24h. LiFePO can be obtained after cooling to room temperature 4 / AC composite material (LAC). Figure 1(a) is a scanning electron microscope (SEM) photograph showing LiFePO 4 / AC composite material micro morphology.

[0029] Use lithium acetate, lithium hydroxide or lithium oxalate instead of Li 2 CO 3 , With the same result.

Embodiment 2

[0032] Example 2: Preparation of LiFePO by solid phase synthesis 4 / AC composite cathode material

[0033] Take Li 2 CO 3 0.924g, ferrous oxalate FeC 2 O 4 ·2H 2 O 4.498g and NH 4 H 2 PO 4 Mix 2.875g thoroughly, then add 15g of activated carbon to grind uniformly, and grind the mixture into a uniform slurry in 100mL acetone solvent, then preheat it at 350℃ for 12h in an inert atmosphere, take out the precursor and grind it evenly and then at 750℃ Roasting for 24h. LiFePO can be obtained after cooling to room temperature 4 / AC composite material (LAC). Figure 1(b) is a scanning electron microscope (SEM) photograph showing LiFePO 4 / AC composite material micro morphology.

Embodiment 3

[0036] Example 3: Preparation of LiMn by solid phase synthesis 2 O 4 / AC composite cathode material:

[0037] Take LiOH·H 2 O 1.049g, electrolytic MnO 2 4.347g, mix well, then add 18g of activated carbon to grind uniformly, and grind the mixture into a uniform slurry under 50mL of acetone solvent, then transfer it into the muffle furnace, keep it at 450℃ for 6h; then heat up to 750℃, keep it for 24h , LiMn is obtained by natural cooling to room temperature 2 O 4 / AC composite materials.

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Abstract

The invention relates to a novel energy accumulator, i.e. a battery--- a super capacity energy accumulator, and the composite positive material is obtained by situ composition of the resources for fabricating lithium-contained composite metal oxide materials and porous carbon materials. The resources for fabricating lithium-contained composite metal oxide materials and porous carbon materials are ground in acetone or ethanol to form the uniform flow state with the solvent being volatilized, preheated in the inert atmosphere, ground uniformly after naturally cooling, roasted in the inert atmosphere again, and cooled down to the room temperature to obtain the target product. The composite anode is used as the anode of the battery--- the super capacity energy accumulator, lithium-contained composite metal oxide material or lithium ion-embeddable inorganic oxide material is used as the cathode of the battery--- the super capacity energy accumulator, non-aqueous lithium salt organic solution is used as the electrolyte solution, and an electron-insulation diaphragm through which ions can pass is provided between the anode and the cathode. The novel energy accumulator has better energy density and performance on service life, and after 100 times of circulations, the capacity is lost by 9.18 percent. The energy accumulator in the invention has both the properties of super capacitors and rechargeable batteries.

Description

Technical field [0001] The invention relates to a new type of energy storage device, specifically a battery-supercapacitor energy storage device, which belongs to the technical field of batteries and capacitors. Background technique [0002] Due to energy shortages and increasing urban environmental pollution, scientists put forward the concept of hybrid electric vehicles as early as the 1960s, the purpose of which is to save fuel and reduce exhaust emissions. The emergence of hybrid electric vehicles requires a corresponding power source. There are currently two types of power sources for most hybrid electric vehicles. The first type uses secondary batteries as the power source, but the power density of the battery is small, which cannot meet the output power requirements of electric vehicles when starting, accelerating, and climbing; the charging and discharging current is small, and the charging time is long, which cannot meet the requirements of a short time. Current charging...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/48H01M4/04H01M16/00H01M14/00H01M10/00H01G9/042H01G9/058H01G9/00H01G11/50H01G11/86
CPCH01G11/32Y02E60/13H01G11/06
Inventor 潘中来邓正华胡学步刘力怀永建林子吉李仁贵索继栓
Owner CHENGDU ZHONGKE LAIFANG POWER SCI & TECH CO LTD