Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of secondary battery and preparation method thereof

A secondary battery and electrolyte technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of unsatisfactory electrochemical performance of potassium ion batteries, limited lithium resource reserves, complex processes, etc., and achieve a good charge-discharge cycle. performance, suitable for large-scale production, and the effect of simple process

Active Publication Date: 2021-02-26
SHENZHEN INST OF ADVANCED TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the first aspect of the present invention provides a kind of secondary battery, and this battery uses the material that can intercalate potassium salt anion such as graphite as positive electrode active material, simultaneously as negative electrode current collector and negative electrode active material with metal foil, uses potassium salt As an electrolyte, it aims to solve the problems of limited lithium resource reserves and high cost in the existing commonly used lithium secondary batteries, as well as the unsatisfactory electrochemical performance and complicated process of the existing potassium ion batteries

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of secondary battery and preparation method thereof
  • A kind of secondary battery and preparation method thereof
  • A kind of secondary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] Correspondingly, an embodiment of the present invention also provides a method for preparing the above-mentioned secondary battery, including the following steps:

[0045] (1) Prepare the positive electrode: provide a positive electrode current collector with a clean surface, weigh the positive electrode active material, conductive agent and binder in a certain proportion, add an appropriate solvent and fully mix to form a uniform slurry; then apply the slurry evenly on the On the surface of the positive electrode current collector, a positive electrode active material layer is formed, and after being completely dried, it is pressed and cut to obtain a battery positive electrode of the desired size;

[0046] (2) Prepare the negative electrode: cut the metal foil into the required size, clean and dry the surface to obtain the negative electrode;

[0047] (3) Electrolyte preparation: Weigh a certain amount of potassium salt electrolyte and add it into the non-aqueous solv...

Embodiment 1

[0054] A method for preparing a secondary battery, comprising the steps of:

[0055] (1) Preparation of battery negative electrode: take tin foil with a thickness of 0.02 mm, cut it into discs with a diameter of 12 mm, clean the surface of the tin foil with ethanol, dry it and use it as a negative electrode for later use;

[0056] (2) Preparing the diaphragm: cutting the glass fiber film into discs with a diameter of 16 mm as a diaphragm for subsequent use;

[0057] (3) Preparation of electrolyte: weigh 3g of potassium hexafluorophosphate (KPF 6 ) into a mixed solvent of 5mL ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate (the volume ratio of the three is 4:3:2), stir until potassium hexafluorophosphate is completely dissolved, and then add a mass fraction of 5% The fluoroethylene carbonate is used as an additive, and the electrolyte solution is obtained after being fully stirred evenly;

[0058] (4) Preparation of battery positive electrode: Add 0.8g of ex...

Embodiment 2-10

[0072] The only difference between Example 2-10 and Example 1 is that the material selection of the negative electrode is different, as shown in Table 2. The secondary battery obtained in Example 2-12 was subjected to a constant current charge and discharge test, and the results are shown in Table 2. Show:

[0073] Table 2

[0074]

[0075] It can be seen from Table 2 that when tin foil is used as the negative electrode, the specific capacity of the battery is higher, the cycle performance is better, and the energy density is the highest.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a secondary battery, comprising a positive electrode, an electrolyte, a negative electrode and a diaphragm; wherein the positive electrode includes a positive electrode current collector and a positive electrode active material layer arranged on the positive electrode current collector, and the positive electrode active material layer includes a positive electrode active material. The positive electrode active material includes a material that can intercalate potassium salt anions; the electrolyte includes potassium salt and a non-aqueous solvent; the negative electrode includes a metal foil, and the metal foil simultaneously serves as a negative electrode current collector and a negative electrode active material. The secondary battery electrolyte uses potassium salt as the electrolyte, which solves the problem of limited lithium resource reserves in the currently commonly used lithium secondary batteries, reduces the cost of the secondary battery and is environmentally friendly; in addition, because the metal foil is also active as the negative electrode Materials and current collectors reduce the weight and volume of the battery, thereby increasing the energy density of the battery and saving battery manufacturing costs.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, in particular to a secondary battery and a preparation method thereof. Background technique [0002] A secondary battery, also known as a rechargeable battery, is a battery that can be repeatedly charged and discharged and used many times. Compared with primary batteries, secondary batteries have the advantages of low cost and less environmental pollution. At present, the main secondary battery technologies include lead-acid batteries, nickel-chromium batteries, nickel-metal hydride batteries, lithium-ion batteries, etc., among which lithium-ion batteries are the most widely used. However, lithium-ion batteries are facing the problems of limited lithium resource reserves and high cost. As a potential energy storage technology to replace lithium-ion batteries, potassium-ion batteries have attracted increasing attention in recent years. [0003] The working principle of potassium-ion...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0568H01M10/0567H01M4/134H01M4/38H01M10/054H01M10/0585
CPCH01M4/134H01M4/38H01M4/387H01M10/054H01M10/0567H01M10/0568H01M10/0585Y02E60/10Y02P70/50
Inventor 唐永炳季必发张帆
Owner SHENZHEN INST OF ADVANCED TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com