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Fully compliant potassium ion battery capable of being charged and discharged as well as preparation method and application thereof

A potassium ion, fully flexible technology, used in electrolyte battery manufacturing, electrode manufacturing, secondary batteries, etc., can solve the problems of short life, poor rate, low energy density, etc., to improve rate performance and cycle stability, increase activity Site and interlayer spacing, the effect of improving specific surface area and interlayer spacing

Inactive Publication Date: 2019-06-14
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a fully flexible potassium ion battery that can be charged and discharged, so as to solve the problems of low capacity, poor rate, short life, and low energy density in the existing potassium ion batteries. , poor flexibility, the total power density, energy density and cycle life are still far from meeting the expected needs, etc.
[0006] The second object of the present invention is to provide a method for preparing the above-mentioned fully flexible potassium-ion battery, by which a fully flexible potassium-ion battery that can be charged and discharged is prepared to solve the problems of low capacity and poor rate of the above-mentioned existing potassium-ion battery , short life, low energy density, poor flexibility, and the total power density, energy density and cycle life are still far from meeting the expected needs.
[0007] The third object of the present invention is to provide the application of the above-mentioned fully flexible potassium ion battery to solve the problem that the existing potassium ion battery has a large radius of potassium ions, difficult insertion / extraction in the electrochemical reaction process, low capacity, poor magnification, and long service life. Short, low energy density, poor flexibility, the total power density, energy density and cycle life are still far from meeting the expected needs.

Method used

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  • Fully compliant potassium ion battery capable of being charged and discharged as well as preparation method and application thereof
  • Fully compliant potassium ion battery capable of being charged and discharged as well as preparation method and application thereof
  • Fully compliant potassium ion battery capable of being charged and discharged as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Rechargeable fully flexible potassium ion battery, including positive electrode material, negative electrode material and electrolyte. Among them, the positive electrode material is KPB@CC nanomaterials, the negative electrode material is N,P-VG@CC nanomaterials, and the electrolyte is KPF 6 , ethylene carbonate, dimethyl carbonate and fluoroethylene carbonate mixed solution.

[0053] The preparation process of KPB@CC nanomaterials is as follows:

[0054] Prepare solution A: take 4mmol FeSO 4 ·H 2 O and 0.4g of PVP K-30 (ie, polyvinylpyrrolidone) were dissolved in 40ml of deionized water, stirred and mixed by a magnetic stirrer to obtain solution A.

[0055] Prepare solution B: take 4mmol K 4 Fe(CN) 6 ·3H 2 O was dissolved in 50ml deionized water, stirred and mixed by a magnetic stirrer to obtain solution B.

[0056] Preparation of KPB nanoparticles: Add solution B to solution A dropwise, stirring continuously during the dropping process, after stirring for a tot...

Embodiment 2-4

[0086] The preparation method of Examples 2-4 is the same as that of Example 1, the difference lies in the flow rates of hydrogen and methane when VG is grown on the flexible carbon cloth substrate. The specific flow rate regulation in the preparation method of Examples 2-4 is shown in Table 1. The N,P-VG@CC nanomaterial prepared in Example 2-4 was used to assemble and prepare a fully flexible potassium ion battery, and the energy storage of the fully flexible potassium ion battery was studied by referring to the same constant current charge and discharge test method as in Example 2 above. performance. The fully flexible potassium ion battery prepared in embodiment 1 is at 50mAg -1 The corresponding specific capacity is 116.25mA h g -1 , the fully flexible potassium-ion battery prepared in test example 2-4 was tested at 50mA g -1 When the corresponding specific capacity.

[0087] Table 1 Flow rate regulation of hydrogen and methane

[0088]

Embodiment 5-7

[0090] The preparation method of Examples 5-7 is the same as that of Example 1, except that the temperature and time of doping heating are different when VG is grown on the flexible carbon cloth substrate. The specific heating time and heating temperature of doping heating in the preparation method of Examples 5-7 are shown in Table 2. Using the N,P-VG@CC nanomaterials prepared in Examples 5-7 to assemble and prepare a fully flexible potassium ion battery, refer to the same constant current charge and discharge test method as in Example 2 above to study the energy storage of the fully flexible potassium ion battery performance. The fully flexible potassium ion battery prepared in Example 1 still had a capacity retention rate of 86.9% after 150 continuous charge and discharge times, and the capacity retention rate of the fully flexible potassium ion battery prepared in Examples 5-7 was tested after 150 continuous charge and discharge times.

[0091] Table 2 Heating time and he...

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PUM

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Abstract

The invention discloses a fully compliant potassium ion battery capable of being charged and discharged. The fully compliant potassium ion battery comprises a cathode material, an anode material and electrolyte; the cathode material adopts a KPB@CC nanomaterial, the anode material adopts an N,P-VG@CC nanomaterial, and the electrolyte is mixed solution of KPF6, ethylene carbonate, dimethyl carbonate and fluoroethylene carbonate. The invention also discloses a preparation method and application of the fully compliant potassium ion battery. The fully compliant potassium ion battery capable of being charged and discharged has the advantages that both specific surface area and interlamellar spacing of an electrode material are increased, thus performance of the potassium ion battery is effectively improved; and the electrode material can be applied to assembly of the compliant potassium ion battery, so that reversible capacity, rate capability and cycling stability of the potassium ion battery are greatly improved.

Description

technical field [0001] The present invention relates to the technical field of electrochemical energy storage batteries, in particular to a chargeable and dischargeable fully flexible potassium ion battery, and the present invention also relates to a preparation method of the chargeable and dischargeable fully flexible potassium ion battery and the rechargeable fully flexible Applications of potassium ion batteries. Background technique [0002] With the rapid growth of the world's population and the continuous development of human society, people's various demands for energy are increasing day by day. It is obvious that traditional fossil energy cannot meet the various demands of future society for energy in the long run. In addition, with the development and utilization of fossil energy, the greenhouse effect is becoming more and more serious, and the ecological environment is deteriorating. Renewable and environmentally friendly green energy has become a common concern in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M4/62H01M4/04H01M4/66H01M10/054H01M10/0567H01M10/058B82Y30/00
CPCY02E60/10Y02P70/50
Inventor 邱文达黎彧肖红兵
Owner GUANGDONG IND TECHN COLLEGE
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