Polyaniline Coated Hollow Sulfur Prepared Using Sublimate 2,4,6-tri(propan-2-yl)-1,3,5-trioxane as Template for Sulfur Electrode

Authors

Zhang-feng LI, Shanghai institute of space power-sources, Shanghai 200245, China;
Xiao-rui WANG, Shanghai institute of space power-sources, Shanghai 200245, China;
Wen-sheng TIAN, Shanghai institute of space power-sources, Shanghai 200245, China;
Jin-ze YANG, Shanghai institute of space power-sources, Shanghai 200245, China;
Ping ZHANG, Shanghai institute of space power-sources, Shanghai 200245, China;
Li-ping MA, Shanghai institute of space power-sources, Shanghai 200245, China;
Yang CHEN, Department of chemistry, Fudan University, Shanghai 200433, China;
Xiao-li CUI, Department of chemistry, Fudan University, Shanghai 200433, China;
Zhi-yu JIANG, Department of chemistry, Fudan University, Shanghai 200433, China;Follow

Corresponding Author

Zhi-yu JIANG(zyjiang@fudan.ac.cn)

Abstract

An advance method for preparing polyaniline-coated hollow sulfur material using sublimate material ADD(2,4,6-tri(propan-2-yl)-1,3,5-trioxane) as a template was developed for lithium-sulfur battery. At first, the smashed ADD particles were coated by a sulfur layer through the reaction of Na₂S₂O₃ with diluted HCl. Then polyaniline layer was coated again on the surface of sulfur layer through the reaction of aniline with (NH₄)₂S₂O₈. After being dried at 60 ^oC for 12 h, the ADD in such a composite evaporated totally, and resulted in the formation of polyaniline-coated hollow sulfur composite. The SEM, TEM and TG measurements showed, that the particle size of as prepared polyaniline-coated hollow sulfur composite was about 2 μm, and the content of sulfur in the composite was 61.1%. The first discharge capacity was 776.2 mAh·g^-1 with a coulombic efficiency of 95.9%, at charge-discharge current of 500 mA·g^-1. After 100 cycles, the discharge capacity remained 524.7 mAh·g^-1. Because the polyaniline layer could inhibit the diffusion of polysurfides to outside of membrane, the hollow space in the core could buffer the volume change of sulfur during cycling. The discharge capacity and the charge-discharge stability of polyaniline-coated hollow sulfur were much higher than those of hollow sulfur without coating polyaniline, as well as those of chemical prepared sulfur. This new method for preparing polyaniline-coated hollow sulfur material is simple, low cost, and may have a promising prospect for the practical application.

Graphical Abstract

Keywords

Lithium-sulfur battery, sulfur cathode, polyaniline, sublimate material

DOI Link

https://doi.org/10.13208/j.electrochem.180530

Publication Date

2019-12-28

Online Available Date

2019-01-15

Revised Date

2018-06-15

Received Date

2018-05-30

Recommended Citation

Zhang-feng LI, Xiao-rui WANG, Wen-sheng TIAN, Jin-ze YANG, Ping ZHANG, Li-ping MA, Yang CHEN, Xiao-li CUI, Zhi-yu JIANG. Polyaniline Coated Hollow Sulfur Prepared Using Sublimate 2,4,6-tri(propan-2-yl)-1,3,5-trioxane as Template for Sulfur Electrode[J]. Journal of Electrochemistry, 2019 , 25(6): 645-650.
DOI: 10.13208/j.electrochem.180530
Available at: https://jelectrochem.xmu.edu.cn/journal/vol25/iss6/1