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

Preparation method of tandem laminated lithium-sulfur battery

A lithium-sulfur battery, stacking technology, applied in the direction of lithium battery, electrolyte battery manufacturing, battery electrodes, etc., can solve the problems of poor Nafion membrane electrolyte absorption capacity, unfavorable high current charge and discharge, and inability to resist lithium electrodes, etc. The effect of generating cost, improving battery safety, and improving cycle life

Inactive Publication Date: 2015-05-13
ZHEJIANG UNIV
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Li + The concentration of lithium ions in the Nafion-type membrane is limited, and polysulfide ions will also be adsorbed, resulting in the loss of positive active materials and capacity decline.
And Li + The strength of the Nafion-type membrane is weak, and it cannot resist the formation of dendrites on the lithium electrode, which will cause the diaphragm to penetrate and cause a short circuit.
In addition, Li + Type Nafion membrane has poor electrolyte absorption capacity and high internal resistance, which is not conducive to high current charging and discharging

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
  • Preparation method of tandem laminated lithium-sulfur battery
  • Preparation method of tandem laminated lithium-sulfur battery
  • Preparation method of tandem laminated lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] Provided is a method for preparing a series-connected laminated lithium-sulfur battery diaphragm, which specifically includes the following steps:

[0044] (1) PEO modified Li + -Nafion preparation comprises the following steps:

[0045] Get 10g LiOH and join in 100mL Nafion solution (20wt%, produced in DuPont Company), after stirring for 30 minutes, centrifuge off excess LiOH, obtain Li + -Nafion solution; Li + -Nafion solution 100mL, add 2g commercially available PEO (molecular weight is 500,000g mol -1 ) and 50mL deionized water, stirred for 1 hour to obtain PEO modified Li + -Nafion solution, after spray drying, to obtain PEO modified Li + - Nafion powder;

[0046] (2) The preparation of the modified polypropylene composite diaphragm comprises the following steps:

[0047] At 60 °C, the above PEO-modified Li + - Dissolve Nafion powder (0.07g) in NMP (2g), add 0.07g acetylene black and stir evenly, take 0.5ml and drop it onto a commercially available microporo...

Embodiment 1

[0065] Example 1: Preparation of macroporous carbon material

[0066] According to the mass ratio of 1:1, weigh the hydrophilic nano-CaCO produced by Ruicheng Warner Nano Materials Co., Ltd., with a particle size of 15-40nm. 3 Add 10g of glucose and 10g each to 100mL deionized water, mix with ultrasonic vibration for 30 minutes to dissolve glucose and mix with nano-CaCO 3 Disperse evenly; heat to evaporate water, and then solidify at 160°C for 6 hours; raise the temperature of the cured product to 900°C under the protection of nitrogen atmosphere, and carbonize at constant temperature for 2 hours; concentration of sodium hydroxide solution and deionized water, and then dried at a constant temperature of 120° C. for 4 hours to obtain a macroporous carbon material.

Embodiment 2

[0067] Example 2: Preparation of cathode material

[0068] The elemental sulfur and the macroporous carbon obtained in Example 1 were mechanically mixed at a mass ratio of 7:3, placed in a reactor made of 316 stainless steel, and then the reactor was evacuated and heated to 80°C, and the reaction was completed after 5 hours Sulfur loading, and then cooling the reaction product to 10°C, the positive electrode material was obtained.

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
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of batteries, and aims to provide a preparation method of a tandem laminated lithium-sulfur battery. The lithium-sulfur battery comprises a diaphragm, a positive electrode, a negative electrode and an electrolyte, wherein the diaphragm adopts a modified polypropylene composite diaphragm, the positive electrode and the negative electrode are arranged on two sides of the diaphragm to form a sandwich structure, and electrode material sides of the positive electrode and the negative electrode face the diaphragm. According to the preparation method, the working voltage is high, an external contact point is avoided, and miniaturization of a high-voltage lithium-sulfur battery becomes possible; the defect that the traditional lithium ion battery using a liquid electrolyte cannot form the tandem laminated battery is overcome, and the battery safety is improved; transfer of polysulfide ions in charge-discharge processes is avoided, and quite long cycle life is realized; active materials have rich sources and low cost, and are pollution-free and easy to prepare; the electrode materials are low in cost, a preparation technology is simple and feasible, scale production is facilitated, and broad application prospect is realized.

Description

technical field [0001] The invention relates to the field of batteries, in particular to an aluminum / copper bimetallic film, the side of the copper metal is connected to lithium metal, the side of the aluminum metal is connected to the sulfur electrode material, and the modified microporous polypropylene film is coated on both sides A method for preparing a composite diaphragm formed by a conductive carbon layer and a series stacked lithium-sulfur battery prepared by using the same. Background technique [0002] Lithium-sulfur battery is a kind of lithium-ion battery. Sulfur is used as the positive electrode material of the battery. It has the advantages of light weight, large capacity, and no memory effect. The specific energy of lithium-sulfur batteries is much higher than that of commercially widely used lithium-ion batteries. Moreover, sulfur is an environmentally friendly element that basically has no pollution to the environment. Lithium-sulfur batteries are a very p...

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): H01M2/16H01M4/133H01M50/403H01M50/414H01M50/451H01M50/497
CPCH01M4/139H01M10/052H01M10/058H01M50/403H01M50/446Y02E60/10
Inventor 李洲鹏金黎明林启睿路畅刘宾虹
Owner ZHEJIANG UNIV