Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Binary transition metal sulfides hierarchical multi-shelled hollow nanospheres with enhanced energy storage performance

향상된 에너지 저장 능력을 가진 이중 전이금속 황화물 계층적 중공 구조의 나노구

  • Lee, Young Hun (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Choi, Hyung Wook (SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University) ;
  • Kim, Min Seob (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Jeong, Dong In (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Tiruneh, Sintayehu Nibret (School of Advanced Materials Science & Engineering, Sungkyunkwan University) ;
  • Kang, Bong Kyun (Electronic Materials and Device Research Center, Korea Electronics Technology Institute (KETI)) ;
  • Yoon, Dae Ho (School of Advanced Materials Science & Engineering, Sungkyunkwan University)
  • 이영훈 (성균관대학교 신소재공학과) ;
  • 최형욱 (성균관대학교 성균나노과학기술원) ;
  • 김민섭 (성균관대학교 신소재공학과) ;
  • 정동인 (성균관대학교 신소재공학과) ;
  • ;
  • 강봉균 (전자부품연구원) ;
  • 윤대호 (성균관대학교 신소재공학과)
  • Received : 2018.04.10
  • Accepted : 2018.05.09
  • Published : 2018.06.30
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Abstract

The metal alkoxide, CuCo-glycerate nanospheres (NSs), were successfully synthesized as Cu-Co bimetallic sulfides hierarchical multi-shelled hollow nanospheres ($CuCo_2S_4$ HMHNSs) through solvothermal synthesis. In this reaction mechanism, the solvothermal temperature and the amount of glycerol as a cosurfactant play significant role to optimize the morphology of CuCo-glycerate NSs. Furthermore, $CuCo_2S_4$ HMHNSs were obtained under optimized sulfurization reaction time of 10 h via anion exchange reaction between glycerate and sulfur ions. Finally, the structural and chemical compositions of CuCo-glycerate NSs and $CuCo_2S_4$ HMHNSs were confirmed through field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and electrochemical performances.

금속 알콕사이드인 CuCo-glycerate 나노구의 용매열합성 과정을 통해 단분산된 Cu-Co 이중 금속 황화물 계층적 중공 구조의 나노구($CuCo_2S_4$ HMHNSs)를 합성하는데 성공하였다. 이 반응 메커니즘에서 용매열합성 온도와 보조 계면활성제인 glycerol의 양은 CuCo-glycerate 나노구의 형태를 최적화하는데 중요한 역할을 한다. 또한 $CuCo_2S_4$ HMHNSs는 glycerate와 황 이온 간의 음이온 교환 반응을 통해 10시간의 최적화된 황화 반응 조건하에서 성공적으로 합성되었다. 최종적으로 합성된 물질의 구조적, 화학적 특성은 SEM, TEM, XRD와 전기화학적 특성 평가에 의해 확인되었다.

Keywords

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