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Button lithium battery adopting lithium-ion solid electrolytic sheet as diaphragm and preparation method of battery

A technology of solid electrolyte and lithium ion, which is applied in the field of button lithium battery and its preparation, and can solve the problem of low electronic conductivity

Active Publication Date: 2019-01-29
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the electronic conductivity of solid electrolytes is extremely low, generally one ten-thousandth of the ionic conductivity.

Method used

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  • Button lithium battery adopting lithium-ion solid electrolytic sheet as diaphragm and preparation method of battery
  • Button lithium battery adopting lithium-ion solid electrolytic sheet as diaphragm and preparation method of battery

Examples

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Comparison scheme
Effect test

Embodiment 1

[0062] A kind of button lithium battery with lithium ion solid electrolyte sheet as diaphragm of the present invention, it comprises parts and is: lithium ion solid electrolyte sheet, positive electrode sheet (LiFePO 4 , aluminum foil, PVDF binder, acetylene black, NMP solvent), positive electrode casing, lithium sheet, negative electrode casing, electrolyte LiPF 6 , filter paper sheet, stainless steel sheet and shrapnel, the lithium ion solid electrolyte sheet is Li after sintering 0.2 La 0.6 TiO 3 Ceramics;

[0063] The model of the positive electrode casing, negative electrode casing, stainless steel sheet, and shrapnel is CR2032, the appearance size is 20mm in diameter, and the thickness is 3.2mm;

[0064] The positive plate is made of commercial product LiFePO 4 , aluminum foil, PVDF binder, acetylene black, NMP preparation, mass ratio LiFePO 4 : PVDF (dissolved in NMP, the mass ratio of PVDF and NMP is 1:19): acetylene black=8:20:1, the diameter of the positive elec...

Embodiment 2

[0084] A kind of button lithium battery that uses lithium ion solid electrolyte sheet as separator of the present invention, its half-battery sectional view is as follows figure 1 As shown, 1-1 is the negative electrode shell; 1-2 is the shrapnel; 1-3 is the stainless steel sheet; 1-4 is the lithium sheet; 1-5 is the filter paper soaked in the electrolyte; 1-6 is the lithium ion solid electrolyte sheet; 1-7 is the positive electrode sheet; 1-8 is the positive electrode shell, and the lithium ion solid electrolyte sheet is sintered Li 0.25 La 0.583 TiO 3 Ceramics;

[0085] It includes components: lithium ion solid electrolyte sheet 1-6, positive electrode sheet (LiFePO 4 , aluminum foil, PVDF binder, acetylene black, NMP solvent) 1-7, positive electrode case 1-8, lithium sheet 1-4, negative electrode case 1-1, electrolyte LiPF 6 , filter paper 1-5, stainless steel 1-3, shrapnel 1-2;

[0086] The model of the positive electrode casing 1-8, the negative electrode casing 1-1,...

Embodiment 3

[0107]A kind of button lithium battery with lithium ion solid electrolyte sheet as diaphragm of the present invention, it comprises parts and is: lithium ion solid electrolyte sheet, positive electrode sheet (LiFePO 4 , aluminum foil, PVDF binder, acetylene black, NMP solvent), positive electrode casing, lithium sheet, negative electrode casing, electrolyte LiPF 6 , filter paper sheet, stainless steel sheet, shrapnel, described lithium ion solid electrolyte sheet is Li after sintering 0.33 La 0.557 TiO 3 Ceramics;

[0108] The model of the positive electrode casing, negative electrode casing, stainless steel sheet, and shrapnel is CR2032, the appearance size is 20mm in diameter, and the thickness is 3.2mm;

[0109] The positive plate is made of commercial product LiFePO 4 , aluminum foil, PVDF binder, acetylene black, NMP preparation, mass ratio LiFePO 4 : PVDF (dissolved in NMP, the mass ratio of PVDF and NMP is 1:19): acetylene black=8:20:1, the diameter of the positive...

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Abstract

The invention discloses a button lithium battery adopting a lithium-ion solid electrolytic sheet as a diaphragm and a preparation method of the battery. The battery includes the lithium-ion solid electrolytic sheet, a positive plate, a positive housing, a lithium sheet, a negative housing, an electrolyte LiPF6, filter paper, a stainless steel sheet and an elastic sheet. The preparation method includes the steps of weighing raw materials according to chemical metrology, obtaining the raw materials including Li2CO3, La2O3 and TiO2 for mixing and ball-milling, then drying the wet materials, grinding the materials into finer materials, putting the dried fine materials into an aluminum oxide crucible, placing the crucible in a chamber-type resistance furnace, raising the temperature to 1,000 DEG C, then maintaining the temperature for 6 hours for calcination, making carbonate fully dissolved, and then cooling the dissolved carbonate; after grinding and tableting are conducted to obtain a lithium-ion solid electrolytic sheet diaphragm sample, conducting a solid-phase synthesis reaction, then conducting cooling to generate the lithium-ion solid electrolytic sheet, assembling the battery after the positive plate is prepared, and encapsulating the battery into a finished product. The lithium-ion solid electrolytic sheet is high in ionic conductivity, low in electronic conductivity and high in density, lithium dendrites are unlikely to be penetrated through, and the cycle performance of the prepared lithium battery is great.

Description

technical field [0001] The invention relates to the fields of solid electrolyte and electrochemistry, is suitable for a button battery with a lithium ion solid electrolyte sheet as a diaphragm, and in particular relates to a button lithium battery with a lithium ion solid electrolyte sheet as a diaphragm and a preparation method thereof. Background technique [0002] Lithium battery is a widely used energy storage device at present. It has the characteristics of high specific capacity, long cycle life, no memory effect, and has the advantages of safety, reliability and fast charging and discharging. It has attracted the attention of researchers and is Research hotspots in the field of new energy. Lithium batteries are usually composed of the following components: positive electrode materials, negative electrode materials, electrolytes, separators, and battery casings. The main function of the separator of the lithium battery is to isolate the positive and negative electrode...

Claims

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Application Information

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IPC IPC(8): H01M2/14H01M2/16H01M10/0562H01M10/0565H01M10/058H01M10/0525H01M50/403H01M50/434H01M50/497
CPCH01M10/0525H01M10/0562H01M10/0565H01M10/058H01M2300/0071H01M50/403H01M50/411Y02E60/10Y02P70/50
Inventor 厉英卢佳垚
Owner NORTHEASTERN UNIV
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