향상된 에너지 저장 능력을 가진 이중 전이금속 황화물 계층적 중공 구조의 나노구
Binary transition metal sulfides hierarchical multi-shelled hollow nanospheres with enhanced energy storage performance
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초록
금속 알콕사이드인 CuCo-glycerate 나노구의 용매열합성 과정을 통해 단분산된 Cu-Co 이중 금속 황화물 계층적중공 구조의 나노구(CuCo2S4 HMHNSs)를 합성하는데 성공하였다. 이 반응 메커니즘에서 용매열합성 온도와 보조 계면활성제인 glycerol의 양은 CuCo-glycerate 나노구의 형태를 최적화하는데 중요한 역할을 한다. 또한 CuCo2S4 HMHNSs는 glycerate 와 황 이온 간의 음이온 교환 반응을 통해 10시간의 최적화된 황화 반응 조건하에서 성공적으로 합성되었다. 최종적으로합성된 물질의 구조적, 화학적 특성은 SEM, TEM, XRD와 전기화학적 특성 평가에 의해 확인되었다.
Abstract
The metal alkoxide, CuCo-glycerate nanospheres (NSs), were successfully synthesized as Cu-Co bimetallic sulfides hierarchical multi-shelled hollow nanospheres (CuCo2S4 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, CuCo2S4 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 CuCoglycerate NSs and CuCo2S4 HMHNSs were confirmed through field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and electrochemical performances.
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