Titanium Dioxide Wrapped MOFs-Derived Cobalt-Doped Porous Carbon Polyhedrons as Sulfur Hosts for Advanced Lithium–Sulfur Batteries. Issue 200 (24th July 2019)

• Record Type: Journal Article
• Authors: Li, Miaomiao; Feng, Wangjun; Su, Wenxiao; Song, Changkun; Chen, Linjing
• Is Part Of: Integrated ferroelectrics. Issue 200(2019)
• Page Start: 82
• Page End: 89
• Publication Date: 2019-07-24
• Subjects: Lithium–sulfur battery -- core-shell Co@NPC@TiO2 nanostructures -- cathode; Ferroelectric devices -- Periodicals; Integrated circuits -- Periodicals; 537.244805
• DOI: 10.1080/10584587.2019.1592623
• Languages: English
• ISSNs: 1058-4587

Abstract

Abstract: To overcome the shortcomings (low-activity materials and the poor cycle stability) of lithium-sulfur (Li-S) batteries, rational design of cathode host materials is critical. Herein, we developed core-shellCo@NPC@TiO2 nanostructures, coating titanium dioxide (TiO2 ) on cobalt-doped nanoporous carbon (Co@NPC) derived from the thermal decomposition of zeolitic imidazolate framework-67 (ZIF-67) for sulfur electrodes. The synthesized Co@NPC@TiO2 has excellent electrical conductivity and strong restrictions on polysulfides, the sulfur cathodes with core-shell structure demonstrate a high initial discharge capacity of 1400 mAh g −1 at 0.1 C, compared with porous carbon, the electrical conductivity and cyclic stability are improved obviously.