Ultrafine TiO2 Confined in Porous-Nitrogen-Doped Carbon from Metal-Organic Frameworks for High-Performance Lithium Sulfur Batteries

Yongling An; Zhen Zhang; Huifang Fei; Shenglin Xiong; Bing Ji; Jinkui Feng

doi:10.1021/acsami.6b16699

Ultrafine TiO₂ Confined in Porous-Nitrogen-Doped Carbon from Metal-Organic Frameworks for High-Performance Lithium Sulfur Batteries

ACS Appl Mater Interfaces. 2017 Apr 12;9(14):12400-12407. doi: 10.1021/acsami.6b16699. Epub 2017 Mar 30.

Authors

Yongling An¹, Zhen Zhang¹, Huifang Fei¹, Shenglin Xiong, Bing Ji, Jinkui Feng¹

Affiliation

¹ Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University , Jinan 250061, P.R. China.

PMID: 28358476
DOI: 10.1021/acsami.6b16699

Abstract

Ultrafine TiO₂ confined in porous-nitrogen-doped carbon is synthesized from a single metal-organic framework precursor. As a novel interlayer for lithium-sulfur batteries, the TiO₂@NC composite can act as both a high efficiency lithium polysulfide barrier to suppress the side reactions and an additional current collector to enhance the polysulfide redox reactions. The lithium-sulfur battery with a TiO₂@NC interlayer delivers a high reversible capacity of 1460 mAh g^-1 at 0.2 C and capacity retention of 71% even after 500 cycles with high rate capability.

Keywords: TiO2; interlayer; lithium−sulfur battery; metal−organic framework; nitrogen-doped carbon.