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

Lithium-sulfur secondary battery

A lithium-sulfur secondary battery and lithium-sulfur battery technology, applied in secondary batteries, lithium batteries, batteries, etc., can solve problems such as insufficient effect and performance degradation of lithium-sulfur secondary batteries, and achieve high energy density

Pending Publication Date: 2021-12-24
LG ENERGY SOLUTION LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] These patents have improved the performance degradation of lithium-sulfur secondary batteries to a certain extent by changing the structure or material of the sulfur-carbon composite material used as the positive electrode active material, and by preventing the dissolution of lithium polysulfide, but the effect is not sufficient

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
  • Lithium-sulfur secondary battery
  • Lithium-sulfur secondary battery
  • Lithium-sulfur secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0185] In ethanol (200mL), sulfur (S 8 ) (38 g) and iron phthalocyanine (FePc, product of Sigma-Aldrich Company) (150 mg) as catalytic sites were mixed, and the resultant was ball-milled for 3 hours to prepare iron phthalocyanines having been introduced as catalytic sites. (FePc) of sulfur (FePc-S).

[0186] Subsequently, carbon nanotubes (product of CNanoTechnology Co., Ltd.) (13.5 g) were added to the catalytic site-introduced sulfur (FePc—S) prepared above, and the resultant was ball milled for 3 hours to obtain a mixture.

[0187] Then, the above-prepared mixture was filtered with a vacuum pump, and then washed with ethanol (1000 mL), and the upper layer powder of the mixture obtained from the filtration and washing was dried at 80° C. for 12 hours to prepare a sulfur-carbon mixture.

[0188] Subsequently, the sulfur-carbon mixture prepared above was placed in an oven at 155° C. for 30 minutes for composite formation, and a sulfur-carbon composite material (S / C 70:30 weig...

experiment example 1

[0213] Experimental example 1. Performance evaluation of lithium-sulfur secondary battery

[0214] The performance of each lithium-sulfur secondary battery manufactured in Examples and Comparative Examples was evaluated using a charge-discharge measuring device (LAND CT-2001A, Wuhan, China).

[0215] For each lithium-sulfur secondary battery, at 0.1C (0.55mA·cm -2 ) charging / 0.1C(0.55mA·cm -2 ) discharge for 2.5 cycles, and then at 0.2C (1.1mA·cm -2 ) charging / 0.2C(1.1mA·cm -2 ) discharge for 3 cycles, and then at 0.3C (1.65mA·cm -2 ) charging / 0.5C(2.65mA·cm -2 ) discharge, three measurements were carried out at 25°C. The results obtained here are shown in Table 2 and figure 2 middle.

[0216] [Table 2]

[0217]

[0218] Such as figure 2 As shown, it was confirmed that, compared with Comparative Example 1, the lithium-sulfur secondary battery including the positive electrode according to the present invention had more excellent discharge capacity and overvoltage ...

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
sizeaaaaaaaaaa
diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a lithium-sulfur secondary battery and, more specifically, to a lithium-sulfur secondary battery in which, by comprising a cathode including sulfur with a catalytic site introduced therein and specifying the conditions of the cathode and an electrolyte, higher energy density can be realized as compared to existing lithium-sulfur batteries.

Description

technical field [0001] This application claims Korean Patent Application No. 10-2019-0086694 filed with the Korean Intellectual Property Office on July 18, 2019 and Korean Patent Application No. 10-2020-0080086 filed with the Korean Intellectual Property Office on June 30, 2020 interests, the disclosure of which is incorporated herein by reference in its entirety. [0002] The invention relates to a lithium-sulfur secondary battery. Background technique [0003] As the application fields of secondary batteries expand to electric vehicles (EV), energy storage systems (ESS), etc., lithium-ion secondary batteries with relatively low energy storage density per unit weight (~250Wh / kg) are among such products application has limitations. On the other hand, lithium-sulfur secondary batteries have a high theoretical energy density (˜2600 Wh / kg), and thus have attracted attention as a next-generation secondary battery technology. [0004] A lithium-sulfur secondary battery is a ba...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/0569
CPCH01M10/052H01M10/0569H01M4/38H01M4/62Y02E60/10H01M4/382H01M2004/021H01M2004/028H01M4/366H01M2300/0034H01M2300/0037H01M4/364H01M4/58H01M4/60H01M2220/20
Inventor 金潣守
Owner LG ENERGY SOLUTION LTD