Halloysite-derived mesoporous silica with high ionic conductivity improves Li–S battery performance

Ranxiao Ao; Ziqi Zhu; Shilin Zhang; Qiang Zhang; Chenyu Yan; Feiyue Tu; Tianbao Li; Mitch Guijun Li; Liangjie Fu; Aidong Tang; Huaming Yang

doi:10.1039/D4CC01111B

Halloysite-derived mesoporous silica with high ionic conductivity improves Li–S battery performance†

Ranxiao Ao,^a Ziqi Zhu,^a Shilin Zhang,^ab Qiang Zhang,

^bc Chenyu Yan,^a Feiyue Tu,^d Tianbao Li,^d Mitch Guijun Li,

^e Liangjie Fu,*^abc Aidong Tang*^ac and Huaming Yang

*^abc

Author affiliations

* Corresponding authors

^a Engineering Research Center of Nano-Geomaterials of Ministry of Education, Laboratory of Advanced Mineral Materials, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China
E-mail: tangaidong@cug.edu.cn, hm.yang@cug.edu.cn, franch@cug.edu.cn

^b College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
E-mail: adtang@csu.edu.cn

^c Hunan Key Laboratory of Mineral Materials and Application, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
E-mail: hmyang@csu.edu.cn

^d Changsha Research Institute of Mining and Metallurgy Co. LTD., Changsha 410012, P. R. China

^e Division of Integrative Systems and Design, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China

Abstract

The slow Li⁺ transport rate in the thick sulfur cathode of the Li–S battery affects its capacity and cycling performance. Herein, Fe-doped highly ordered mesoporous silica material (Fe–HSBA-15) as a sulfur carrier of the Li–S battery shows high ion conductivity (1.10 mS cm⁻¹) and Li⁺ transference number (0.77). The Fe–HSBA-15/S cell has an initial capacity of up to 1216.7 mA h g⁻¹ at 0.2C and good stability. Impressively, at a high sulfur load of 4.34 mg cm⁻², the Fe–HSBA-15/S cell still maintains an area specific capacity of 4.47 mA h cm⁻² after 100 cycles. This is because Fe–HSBA-15 improves the Li⁺ diffusion behavior through the ordered mesoporous structure. Theoretical calculations also confirmed that the doping of iron enhances the adsorption of polysulfides, reduces the band gap and makes the catalytic activity stronger.

Chemical Communications

Halloysite-derived mesoporous silica with high ionic conductivity improves Li–S battery performance†

Abstract

Supplementary files

Article information

Download Citation

Permissions

Halloysite-derived mesoporous silica with high ionic conductivity improves Li–S battery performance

Social activity

Search articles by author

Spotlight

Advertisements