Bismuth metal anode for sodium/potassium ion secondary battery and ether-based electrolyte

A secondary battery, potassium ion technology, applied in the field of electrochemistry, can solve the problems of inappropriate charging and discharging platform voltage, low Coulomb efficiency, fast decay, etc., to improve rate performance and cycle stability, improve ionic conductivity, and improve The effect of stability

Active Publication Date: 2017-02-22
NANKAI UNIV
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of small specific capacity, fast decay, inappropriate charging and discharging platform voltage, and low Coulombic efficiency of the existing negative electro

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
  • Bismuth metal anode for sodium/potassium ion secondary battery and ether-based electrolyte
  • Bismuth metal anode for sodium/potassium ion secondary battery and ether-based electrolyte
  • Bismuth metal anode for sodium/potassium ion secondary battery and ether-based electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a sodium-ion battery.

[0034] The composition of the negative electrode material of the sodium ion battery (based on the mass fraction of the negative electrode material as 100%): 80% of bismuth powder, 10% of conductive carbon black, and 10% of polyvinylidene fluoride.

[0035] The counter electrode of a sodium-ion battery is sodium metal.

[0036] The solvent of the electrolyte is: tetraethylene glycol dimethyl ether.

[0037] The electrolyte salt is: sodium trifluoromethanesulfonate, and the substance concentration in the electrolyte is 1 mol / L.

[0038] How to make the battery:

[0039] Negative electrode preparation: Weigh each raw material according to the above negative electrode formula, uniformly disperse it in N-methyl-2-pyrrolidone (NMP) solution, prepare a mixed slurry of negative electrode, and coat the slurry on the copper foil of the negative electrode current collector , dried in a vacuum drying oven at 110°C for 10 hours, an...

Embodiment 2

[0048] This embodiment provides a sodium-ion battery.

[0049] The composition of the negative electrode material of the sodium ion battery (based on the mass fraction of the negative electrode material as 100%): 80% of bismuth powder, 10% of conductive carbon black, and 10% of polyvinylidene fluoride.

[0050] The counter electrode of a sodium-ion battery is sodium metal.

[0051] The solvent of the electrolyte is: triethylene glycol dimethyl ether

[0052] The electrolyte salt is: sodium trifluoromethanesulfonate, and the substance concentration in the electrolyte is 1 mol / L.

[0053] How to make the battery:

[0054] Negative electrode preparation: Weigh each raw material according to the above negative electrode formula, uniformly disperse it in N-methyl-2-pyrrolidone (NMP) solution, prepare a negative electrode mixed slurry, and coat the slurry on the negative electrode current collector copper foil Then, it was dried in a vacuum drying oven at 110° C. for 10 hours, an...

Embodiment 3

[0061] This embodiment provides a sodium-ion battery.

[0062] The composition of the negative electrode material of the sodium ion battery (calculated based on the mass fraction of the negative electrode material as 100%): 80% of bismuth, 10% of conductive carbon black, and 10% of polyvinylidene fluoride.

[0063] The counter electrode of a sodium-ion battery is sodium metal.

[0064] The solvent of the electrolyte is: diethylene glycol dimethyl ether

[0065] The electrolyte salt is: sodium trifluoromethanesulfonate, and the substance concentration in the electrolyte is 1 mol / L.

[0066] How to make the battery:

[0067] Negative electrode preparation: Weigh each raw material according to the above negative electrode formula, uniformly disperse it in N-methyl-2-pyrrolidone (NMP) solution, prepare a negative electrode mixed slurry, and coat the slurry on the negative electrode current collector copper foil Then, it was dried in a vacuum drying oven at 110° C. for 10 hours,...

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
Charge specific capacityaaaaaaaaaa
Charge and discharge current densityaaaaaaaaaa
Discharge specific capacityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a bismuth metal anode for a sodium/potassium ion secondary battery and ether-based electrolyte. The problems of low capacity, low charge and discharge coulomb efficiency, poor cycling stability of bismuth metal in ester electrolyte and the like of a hard carbon anode of the conventional sodium/potassium ion battery are solved. The adopted ether-based electrolyte comprises an ether organic solvent and an electrolyte salt. With use of an anode material bismuth and ether electrolyte system, the coulomb efficiency and cycling stability of the bismuth metal anode of the sodium/potassium ion secondary battery can be greatly improved. In addition, in the system, the bismuth metal has high specific capacity (-385mAh/g) and high rate performance. Experimental results show that the capacity of a button battery assembled by the bismuth metal anode and ether electrolyte system is hardly attenuated and is still kept about 380mAh/g after 200 charge and discharge cycles under a current density of 400mA/g, and broad application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a bismuth negative electrode of a sodium / potassium ion secondary battery and an ether electrolyte system. Background technique [0002] Due to the abundant reserves of sodium in nature (the abundance of sodium in the earth's crust is 2.3%-2.8%), the similar positions of sodium and lithium in the periodic table, the similar physical and chemical properties, and the rapid rise in the price of lithium raw materials and other factors , develop and develop sodium-ion batteries with low price and stable cycle performance, and apply them to the field of large-scale energy storage technology of secondary batteries, which has great commercial value and potential for sustainable utilization. [0003] The currently developed anode materials for sodium-ion batteries mainly include carbon materials, organic materials, non-metallic elements, intercalated transition metal o...

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
IPC IPC(8): H01M4/38H01M10/054H01M10/0568H01M10/0569
CPCH01M4/38H01M10/054H01M10/0568H01M10/0569H01M2300/0028H01M2300/0037Y02E60/10
Inventor 李福军王晨晨王刘彬袁月雷凯翔陈军
Owner NANKAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap