Co/Co3O4-embedded N-doped hollow carbon composite derived from a bimetallic MOF/ZnO Core-shell template as a sulfur host for Li-S batteries

Youngmoo Jeon, Jeongyeon Lee, Hakrae Jo, Hwichan Hong, Lawrence Yoon Suk Lee (Corresponding Author), Yuanzhe Piao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

Lithium-sulfur batteries are a promising next-generation energy storage technology. To meet the industrial requirements, however, effective sulfur host materials are highly desired for the enhanced sulfur loading and lithium polysulfides (LiPSs) trapping. Herein, we describe the synthesis of N-doped hollow carbon composite embedded with well-dispersed Co/Co3O4 nanoparticles (Co/Co3O4-NHC) via the carbonization of a Zn/Co bimetallic metal-organic frameworks/ZnO nanospheres core-shell structure. The Co/Co3O4-NHC features uniform N-doping, intertwined carbon nanotubes (CNTs), and dual types of pores. ZnO nanospheres employed as a template for hollow structure also contribute to the formation of CNTs and micro-pores. The S-infiltrated Co/Co3O4-NHC cathode delivers an excellent rate performance (specific capacity of 447.9 mA h g−1 at 5 C-rate) and stability (553.4 mA h g−1 after 500 cycles). With a high S loading (4 mg cm−2), 87.8% of specific capacity is retained after 250 cycles. This work can offer insights on designing the sulfur host materials for high-performance Li-S batteries.

Original languageEnglish
Article number126967
JournalChemical Engineering Journal
Volume407
DOIs
Publication statusPublished - 1 Mar 2021

Keywords

  • Cathode
  • Cobalt oxide nanoparticle
  • Lithium sulfur battery
  • ZIF-67
  • Zinc oxide nanosphere

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this