Articles
  • Fabrication of AlGaN-based vertical light-emitting diodes
  • Seon Min Baea, Hunsoo Jeona, Gang Seok Leea, Se-Gyo Junga, Kyoung Hwa Kima, Sam Nyung Yia, Min Yanga, Hyung Soo Ahna,*, Young Moon Yub, Suck-Whan Kimc, Seong Hak Cheond, Hong-Ju Had and Nobuhiko Sawakie
  • a Department of Applied Sciences, Korea Maritime University, Busan 606-791, Korea b LED-Marin Convergence Technology R&BD Center at Pukyong National University, Busan 608-737, Korea c Department of Physics, Andong National University, Andong, Gyeongbuk 760-749, Korea d CSsol.Co., Ltd, Busan 606-791, Korea e Department of Electrical and Electronics Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
Abstract
Ge-S and Li-Ge-S powders were synthesized via solution-based process in order to employ chalcogenide-based solid electrolyte for use in Li secondary batteries. GeCl4 and thioacetamide in combination result in Ge-S powders of which major crystalline phase becomes GeS2 where the tetragonal and orthorhombic phases coexist after heat treatment. A chemical treatment using NaOH brings about the reduction of chlorine in the powders obtained. However, the heat treatment at 300 οC is more effective in minimizing the chlorine content. When lithium chloride is used as the precursor of Li ions, the LiCl powders are agglomerated with an inhomogeneous distribution. When Li2S is used, the Li-Ge-S powders are distributed more uniformly and the orthorhombic GeS2 phase dominates in the powders.

Keywords: Solid electrolyte, Li secondary battery, Chalcogenide, Germanium sulfide, Solution-based process.

This Article

  • 2012; 13(S1): 75-77

    Published on Aug 31, 2012