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Potassium/potassium ferrite/Prussian blue solid state battery and preparing method thereof

A Prussian blue, solid-state battery technology, applied in the field of electrochemistry, can solve the problems of slow cost reduction and slow increase in energy density

Active Publication Date: 2018-08-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The development of lithium batteries seems to have encountered a "bottleneck period" until now. The energy density has increased slowly, and the cost has not decreased rapidly. Moreover, in fast charging, adapting to the temperature range, larger-scale deployment applications (electric vehicles, energy storage) and resource abundance have faced challenges

Method used

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  • Potassium/potassium ferrite/Prussian blue solid state battery and preparing method thereof
  • Potassium/potassium ferrite/Prussian blue solid state battery and preparing method thereof
  • Potassium/potassium ferrite/Prussian blue solid state battery and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) 1.2g KFeFe(CN) 6 , 0.6g molecular formula is K 2 Fe 4 o 7 Potassium ferrite 1, 0.2g acetylene black, 0.2g polyvinylidene fluoride (PVDF) and 0.5g N-class-2-pyrrolidone (NMP) are mixed and fully ground and mixed in a mortar to obtain a mixture; Apply the above mixture on aluminum foil, and dry it under vacuum at 120° C. for 24 hours to obtain Prussian blue sheet 2;

[0023] (2) Press potassium ferrite 2 into thin sheets, and sinter at 650°C to obtain potassium ferrite sheets;

[0024] (3) Stack the Prussian blue sheet, potassium ferrite sheet and metal potassium sheet together to assemble a 2032 type potassium / potassium ferrite / Prussian blue solid-state battery 1.

[0025] Potassium ferrite used in the present invention is a novel electrolyte material with a three-dimensional network structure, and its structure is as follows: figure 1 shown.

[0026] The electrochemical stability of potassium ferrite material in the present invention is determined by cyclic vo...

Embodiment 2

[0030] (1) Add 1.g KFeFe(CN) 6 , 0.2g molecular formula is K 2 Fe 4 o 7 Potassium ferrite 1, 0.4g acetylene black, 0.4g polyvinylidene fluoride (PVDF) and 0.5g N-class-2-pyrrolidone (NMP) are mixed and fully ground and mixed in a mortar to obtain a mixture; Apply the above mixture on aluminum foil, and dry it under vacuum at 120° C. for 24 hours to obtain Prussian blue sheet 2;

[0031] (2) The molecular formula is K 2 Fe 4 o 7 Potassium ferrite 2 is pressed into thin sheets and sintered at 650°C to obtain potassium ferrite sheets 2;

[0032] (3) Stack the Prussian blue sheet 2, the potassium ferrite sheet 2 and the metal potassium sheet to form a 2032 type potassium / potassium ferrite / Prussian blue solid-state battery 2.

[0033] The specific capacity of the 2032 type potassium / potassium ferrite / Prussian blue solid-state battery 2 at the rate of 1C for the first charge and discharge is 70mAh / g.

Embodiment 3

[0035] (1) 1.2g KFeFe(CN) 6 , 0.6g molecular formula is K 2 Fe 4 o 7 Potassium ferrite 1, 0.2g acetylene black, 0.2g polyvinylidene fluoride (PVDF) and 0.5g N-a-2-pyrrolidone (NMP) were mixed and then fully ground and mixed in a mortar to obtain a mixture; Apply the above mixture on aluminum foil, and dry it under vacuum at 120° C. for 24 hours to obtain Prussian blue sheet 3;

[0036] (2) The molecular formula is K 2 Fe 4 o 7 Potassium ferrite 2 is pressed into thin sheets and sintered at 650°C to obtain potassium ferrite sheets;

[0037] (3) Stack the Prussian blue sheet 3 , potassium ferrite sheet 3 and metal potassium sheet to form a 2016 type potassium / potassium ferrite / Prussian blue solid-state battery 3 .

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Abstract

The invention discloses a potassium / potassium ferrite / Prussian blue solid state battery and a preparing method thereof, and belongs to the technical field of electrochemistry. The preparing method ofthe potassium / potassium ferrite / Prussian blue solid state battery comprises the steps of mixing Prussian blue, potassium ferrite, acetylene black, polyvinylidene fluoride and N-methyl-2-pyrrolidone according to the mass ratio of 50-60 to 10-30 to 5-20 to 5-20 to 5-20, fully grinding the mixture, smearing the mixture on aluminum foil, and obtaining a Prussian blue sheet after conducting vacuum drying on the aluminum foil for 24-30 hours at the temperature of 120 DEG C; pressing potassium ferrite into a slice, and sintering at the temperature of 650 DEG C to 750 DEG C to obtain an electrolyte sheet. By means of the potassium / potassium ferrite / Prussian blue solid state battery, the Prussian blue sheet, the electrolyte sheet and a metal potassium sheet are stacked together to be assembled intothe potassium / potassium ferrite / Prussian blue solid state battery. The potassium / potassium ferrite / Prussian blue solid state battery has the advantages of being high in safety, high in charging and discharging rate, low in cost and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a potassium / Prussian blue battery and a preparation method thereof. Background technique [0002] Batteries play an important role in practical applications in our lives, including electronic consumption, powering automobiles, stationary loads for intermittent renewable energy generation, etc. However, the current commercial batteries can no longer meet the needs of the rapid development of society, such as portable electronic devices, electric vehicles and network energy storage systems. The development of batteries now needs to have higher energy density, longer cycle life, and be safer and cheaper. In the past 20 years, most of the battery research has focused on the liquid electrolyte system. Even though it has high conductivity and excellent electrode surface wettability, its electrochemical performance and thermal stability are not good, and its ion se...

Claims

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Application Information

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IPC IPC(8): H01M4/136H01M4/134H01M10/0562H01M10/054H01M10/0585
CPCH01M4/134H01M4/136H01M10/054H01M10/0562H01M10/0585H01M2300/0071Y02E60/10Y02P70/50
Inventor 袁宏明李贺杜菲孙雪娇张中禹
Owner JILIN UNIV
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