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Lithium ion secondary battery positive electrode materials of aromatic heterocyclic ketone compounds

A technology for secondary batteries and positive electrode materials, applied in secondary batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve problems such as limited application fields and low capacity, and achieve good cycle stability, easy preparation, and structure. rich effects

Active Publication Date: 2014-01-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The functional principle of lithium-ion secondary batteries is based on the mechanism of ion intercalation. Carbon-based materials such as graphite are mainly used as negative electrode materials. The positive electrode materials are lithium metal oxides, lithium phosphate, etc. Due to the low capacity of these positive electrode main materials, its Lower energy efficiency and power limit the range of its application fields

Method used

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  • Lithium ion secondary battery positive electrode materials of aromatic heterocyclic ketone compounds
  • Lithium ion secondary battery positive electrode materials of aromatic heterocyclic ketone compounds
  • Lithium ion secondary battery positive electrode materials of aromatic heterocyclic ketone compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1, using quinacridone violet (micron-sized rod-shaped particles) as the positive electrode material to test the performance of lithium-ion secondary batteries: 60 mg of quinacridone as the positive electrode material, 30 mg of carbon black and 10 mg of polybias Vinyl fluoride (PVDF) mixed, after adding enough N-methylpyrrolidone, and then coated on aluminum foil. The coated electrodes were placed in a vacuum oven and dried at 373K for 12 hours. Finally, the electrodes are cut with a tablet machine. In a glove box filled with argon, use the electrode sheet as the positive electrode, polyethylene as the diaphragm, lithium hexafluorophosphate / dimethyl carbonate as the electrolyte (1mol / L), and the lithium sheet as the negative electrode to assemble a lithium-ion secondary battery.

[0079] The battery is charged and discharged at a constant current under the condition of a current density of 50mA / g, and the discharge voltage range is 1.5-4.5V. The cycle discharge...

Embodiment 2

[0081] Example 2, using diindoloquinacridone (nano-sized powder particles) as the positive electrode material to test the performance of lithium-ion secondary batteries: 60 mg of diindoloquinacridone as the positive electrode material, 30 mg Carbon black and 10 mg of polyvinylidene fluoride (PVDF) were mixed, after adding a sufficient amount of N-methylpyrrolidone, and then coated on aluminum foil. The coated electrodes were placed in a vacuum oven and dried at 373K for 12 hours. Finally, the electrodes are cut with a tablet machine. In a glove box filled with argon, use the electrode sheet as the positive electrode, polyethylene as the diaphragm, lithium hexafluorophosphate / dimethyl carbonate as the electrolyte (1mol / L), and the lithium sheet as the negative electrode to assemble a lithium-ion secondary battery.

[0082] The battery is charged and discharged at a constant current under the condition of a current density of 50mA / g, and the discharge voltage range is 1.5-4.5V....

Embodiment 3

[0084] Embodiment 3, use quinacridone quinone powder as positive electrode material to carry out the test of lithium ion secondary battery performance: 60 mg quinacridone quinone is used as positive electrode material, 30 mg carbon black and 10 mg polyvinylidene fluoride (PVDF) Mix, add enough N-methylpyrrolidone, and spread on aluminum foil. The coated electrodes were placed in a vacuum oven and dried at 373K for 12 hours. Finally, the electrodes are cut with a tablet machine. In a glove box filled with argon, use the electrode sheet as the positive electrode, polyethylene as the diaphragm, lithium hexafluorophosphate / dimethyl carbonate as the electrolyte (1mol / L), and the lithium sheet as the negative electrode to assemble a lithium-ion secondary battery.

[0085] The battery is charged and discharged at a constant current under the condition of a current density of 50mA / g, and the discharge voltage range is 1.5-4.5V; the cycle discharge capacity retention curve of the batt...

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Abstract

The invention discloses lithium ion secondary battery positive electrode materials of a kind of aromatic heterocyclic ketone compounds. The lithium ion secondary battery positive electrode materials of the aromatic heterocyclic ketone compounds are ketone compounds taking an aromatic heterocyclic ketone or ketone quinine as an electrochemical oxidation reduction position point. The lithium ion secondary battery positive electrode materials comprise aromatic heterocyclic ketone derivatives and aromatic heterocyclic ketone quinine derivatives, the aromatic heterocyclic ketone derivatives and the aromatic heterocyclic ketone quinine derivatives take part in the preparation of an electrode in the mode of micromolecules or clusters in an amorphous state or in the mode of micro crystal and nanometer crystal in the phase state of alpha, beta and gamma or in the mixed phase state, and in the cluster form of the aromatic heterocyclic ketone derivatives and the aromatic heterocyclic ketone quinine derivatives, corresponding structural units are directly connected through C-C keys or a multi-key ring-combination structure. The lithium ion secondary battery positive electrode materials are provided with a dicarbonyl birdging conjugate aromatic framework, and comprise the following structure shown in the formula: . The lithium ion secondary battery positive electrode materials of aromatic heterocyclic ketone compounds has the advantages that (1) structure is abundant, and materials are low in cost and easy to obtain; (2) energy density, multiplying power density and cycling stability are high; (3) 80% of initial capacity is still kept after cycling is conducted for 150 weeks.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials. It specifically relates to an organic material containing heteroatom-containing ketones and quinone compounds, and relates to the application of these organic energy storage materials and their micro-nano-sized particle powders in different crystal states in lithium-ion secondary battery cathode materials and sodium-ion battery cathode materials. , capacitors and other energy storage technologies and other fields Background technique [0002] Lithium-ion secondary batteries have high energy storage and power density, so they have become the most important energy storage and supply source devices / components for mobile electronic devices that are prevalent today. Under the background of several years of research and today's ever-changing technology updates and the demand for energy supply of higher-performance mobile devices, technical conditions and application ranges have been s...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M10/058
CPCH01M4/608H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 黄维解令海赵剑锋殷成蓉
Owner NANJING UNIV OF TECH
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