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Lithium-ion secondary battery cathode material and application of a class of aromatic heterocyclic ketones

A positive electrode material, secondary battery technology, applied in secondary batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of low capacity, limited application scope, etc., and achieve easy preparation, good cycle stability, and structure. rich effects

Active Publication Date: 2016-01-13
NANJING TECH UNIV
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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 cathode material and application of a class of aromatic heterocyclic ketones
  • Lithium-ion secondary battery cathode material and application of a class of aromatic heterocyclic ketones
  • Lithium-ion secondary battery cathode material and application of a class of aromatic heterocyclic ketones

Examples

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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

A class of anode materials for lithium ion secondary batteries of aromatic heterocyclic ketones, which are ketone compounds with aromatic heterocyclic ketones or ketoquinones as electrochemical redox sites, including aromatic heterocyclic ketones and aromatic heterocyclic ketoquinones Derivatives, this type of compound participates in the preparation of electrodes in the form of small molecules or polymers in an amorphous state or in the form of micro-crystals and nano-crystals with α, β, γ and other different phases or mixed phases. , the corresponding structural units are directly connected by C-C bonds or multi-bond and ring structures. The material is a material with a dicarbonyl bridged conjugated aromatic skeleton, and has the following structure: (1) rich in structure, cheap and easy to obtain; (2) high energy density, rate power density and cycle stability ; and (3) the advantages of maintaining 80% of the initial capacity after 150 cycles.

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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Patent Type & Authority Patents(China)
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 TECH UNIV
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