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Polyacrylate-based polymer electrolyte for sodium battery and polymer sodium battery formed from polyacrylate-based polymer electrolyte

A polyacrylate and polymer technology, used in non-aqueous electrolyte batteries, electrolyte battery manufacturing, solid electrolytes, etc., can solve the problems of spontaneous combustion of batteries, hidden safety hazards of sodium batteries, and arbitrary shape restrictions.

Inactive Publication Date: 2016-06-15
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liquid sodium batteries have good high charge and discharge rates and low temperature performance, but the safety performance of batteries is the prerequisite for the commercialization of sodium batteries, and the current safety performance of sodium batteries is mainly due to the fact that the organic solvents in commercial electrolytes are flammable substances. , especially in some special extreme environmental conditions or under the condition of short circuit and overcharge due to internal failure of the battery, the battery will spontaneously ignite or even explode, which makes the sodium battery have a greater safety hazard
And because the liquid sodium battery is packaged as an aluminum shell or a steel shell, the arbitrariness of its shape is limited.

Method used

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  • Polyacrylate-based polymer electrolyte for sodium battery and polymer sodium battery formed from polyacrylate-based polymer electrolyte
  • Polyacrylate-based polymer electrolyte for sodium battery and polymer sodium battery formed from polyacrylate-based polymer electrolyte
  • Polyacrylate-based polymer electrolyte for sodium battery and polymer sodium battery formed from polyacrylate-based polymer electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 1.5g of polyethylene glycol diacrylate, 0.01g of azobisisobutyronitrile and 5g of sodium perchlorate in 75g of propylene carbonate, stir at room temperature until it is in a homogeneous solution state, and mix the above prepolymer solution, glass Fibrous separator, sodium vanadium phosphate positive electrode and sodium metal are assembled into a sodium battery, and after sealing, the o The polymer electrolyte sodium battery was prepared by in-situ polymerization at C for 5 hours.

[0025] After testing, the polymer electrolyte at 25 o The ionic conductivity at C is 8×10 -4 S / cm.

[0026] Test the electrochemical window of the prepared polymer electrolyte: sandwich the electrolyte with stainless steel sheets and sodium sheets, and place it in a 2032 battery case. The electrochemical window is measured by linear voltammetry scanning with an electrochemical workstation, the initial potential is 2.5V, the highest potential is 5.5V, and the scanning speed is 1mV...

Embodiment 2

[0028] Dissolve 2.5g of polyethylene glycol dimethacrylate, 0.02g of benzoyl peroxide and 8g of sodium hexafluorophosphate in a mixed liquid of 85g of ethylene carbonate and dimethyl carbonate (mass ratio 1:1), at room temperature Stir until it is in the state of a homogeneous solution, assemble the above-mentioned prepolymer solution, cellulose separator, molybdenum disulfide negative electrode and sodium metal into a sodium battery, seal it well, and set it at 70 o C in situ polymerization for 4 hours to prepare a polymer electrolyte sodium battery.

[0029] After testing, the polymer electrolyte at 25 o The ionic conductivity at C is 4×10 -4 S / cm.

[0030] Test the electrochemical window of the prepared polymer electrolyte: sandwich the electrolyte with stainless steel sheets and sodium sheets, and place it in a 2032 battery case. The electrochemical window is measured by linear voltammetry scanning with an electrochemical workstation, the initial potential is 2.5V, the ...

Embodiment 3

[0032] Dissolve 1.5g of triethylene glycol diacrylate, 0.03g of azobisisoheptanonitrile and 6g of sodium hexafluorophosphate in 87g of propylene carbonate, stir at room temperature until it is in a homogeneous solution state, and mix the above prepolymer solution, nylon Porous separator, sodium vanadium phosphate positive electrode and molybdenum disulfide negative electrode are assembled into a sodium battery, and after sealing, the o C in situ polymerization for 2 hours to prepare a polymer electrolyte sodium battery.

[0033] After testing, the polymer electrolyte at 25 o The ionic conductivity at C is 6.2×10 -4 S / cm.

[0034] Test the electrochemical window of the prepared polymer electrolyte: sandwich the electrolyte with stainless steel sheets and sodium sheets, and place it in a 2032 battery case. The electrochemical window is measured by linear voltammetry scanning with an electrochemical workstation, the initial potential is 2.5V, the highest potential is 5.5V, and t...

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Abstract

The invention discloses a polyacrylate-based polymer electrolyte for a sodium battery and a polymer sodium battery formed from the polyacrylate-based polymer electrolyte. The polyacrylate-based polymer electrolyte has favorable electrochemical stability and relatively high ion transmission performance and is obtained by applying an in-situ polymerization process, and a precursor of the polyacrylate-based polymer electrolyte comprises a sodium salt, a non-aqueous organic solvent, a polymerizable monomer and an initiator; meanwhile, the sodium battery assembled by applying the polymer electrolyte disclosed by the invention is stable in a charging / discharging curve and has favorable long circulation and rate charging / discharging performance; and moreover, the preparation process of the polymer electrolyte is the same as a traditional commercial lithium battery production process, the polymer electrolyte is simple to prepare and easy to form on the premise of not changing the original battery production process. Therefore, the polyacrylate-based polymer electrolyte prepared through in-situ polymerization, proposed by the invention, is applicable for the field of the sodium battery, and has great commercial potential.

Description

technical field [0001] The invention relates to a polymer electrolyte, in particular to a polyacrylate-based polymer electrolyte for a sodium battery and a polymer sodium battery formed thereof. Background technique [0002] The renewable clean energy currently being developed includes wind energy, solar energy, and tidal energy. They are all intermittent energy sources. If the intermittent and unstable electric energy generated by them is incorporated into the grid, it will seriously interfere with the normal operation of the grid. Therefore, the development It has become a worldwide research hotspot to develop new energy storage technologies that meet large-scale energy storage applications, low cost, high safety, and large scale. At present, the main energy storage technologies include electrochemical energy storage, mechanical energy storage, electromagnetic energy storage and phase change energy storage. Compared with other energy storage methods, electrochemical energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/054H01M10/058
CPCH01M10/054H01M10/0565H01M10/058H01M2300/0082Y02E60/10Y02P70/50
Inventor 崔光磊张建军温慧婕徐红霞刘志宏
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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