Selenium-impregnated hollow carbon microspheres as efficient cathode materials for lithium-selenium batteries

Young Jun Hong, Yun Chan Kang

Research output: Contribution to journalArticlepeer-review

60 Citations (Scopus)

Abstract

Se-impregnated hollow carbon (C-Se) microspheres were studied as cathode materials for Li-Se batteries. Hollow carbon microspheres containing micro- and mesopores were prepared by SnO2 leaching in the core-shell-structured SnO2@C composite microspheres prepared by one-pot spray pyrolysis. The mean size of the empty cores and the mean shell thickness of the hollow carbon microspheres were 490 and 90 nm, respectively. Metallic Se was impregnated into the hollow carbon microspheres by vapor inclusion. The Se content in the C-Se microspheres was measured by thermogravimetric analysis (TGA) to be 59.5 wt%. The discharge capacities of the C-Se microspheres in the 2nd and 1,000th cycles at a constant current density of 0.5 A g−1 were 603 and 525 mA h g−1, respectively, and the capacity retention measured from the 2nd cycle was 87%. The capacity retention of the C-Se microspheres measured from the 10th cycle was almost 100%. The structural stability of the C-Se composite microspheres during repeated Li-insertion and desertion process resulted in excellent Li-ion storage performance.

Original languageEnglish
Pages (from-to)198-206
Number of pages9
JournalCarbon
Volume111
DOIs
Publication statusPublished - 2017 Jan 1

Bibliographical note

Funding Information:
This work was supported by the Creative Industrial Technology Development Program ( 10045141 ) funded by the Ministry of Trade, industry & Energy (MI, Korea). This work was supported by the Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), and granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea ( 201320200000420 and 20153030091450 ).

Publisher Copyright:
© 2016 Elsevier Ltd

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science

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