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RISS 인기검색어
- 검색키워드
- 저자 : Anang, Daniel Adjah (검색결과 3 건)
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Nti, Frederick,Anang, Daniel Adjah,Han, Jeong In Elsevier 2018 JOURNAL OF ALLOYS AND COMPOUNDS Vol.742 No.-
<P><B>Abstract</B></P> <P>A facile synthesis scheme is employed to form NiMoO<SUB>4</SUB>/CoMoO<SUB>4</SUB> nanorods. The as-prepared sample was characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Electrochemical characterization of the sample was investigated by employing cyclic voltammetry (CV), galvanostatic charge and discharge (GCD) and electrochemical impedance spectroscopy (EIS). Our facilely synthesized NiMoO<SUB>4</SUB>/CoMoO<SUB>4</SUB> nanorods utilizes the synergic effects of Ni and Co ternary molybdates which enabled a high specific capacitance of 1445 F/g to be achieved at a current density of 1 A/g and retained 78.8% of its initial capacitance after 3000 cycles at a current density of 10 A/g. The sample also exhibited a low ionic resistance of 1.20 Ω. This performance was much higher than individual NiMoO<SUB>4</SUB> and CoMoO<SUB>4</SUB> nanorods. The simple and scalable scheme employed to form the high performance NiMoO<SUB>4</SUB>/CoMoO<SUB>4</SUB> nanorods makes it a significant low cost electrode material for supercapacitor application.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Design of a facile synthesis scheme for NiMoO<SUB>4</SUB>/CoMoO<SUB>4</SUB> nanorods. </LI> <LI> Simple and environmental friendly scheme for NiMoO<SUB>4</SUB>/CoMoO<SUB>4</SUB> synthesis. </LI> <LI> Evaluation of the synergic effects of NiMoO<SUB>4</SUB> and CoMoO<SUB>4</SUB>. </LI> <LI> NiMoO<SUB>4</SUB>/CoMoO<SUB>4</SUB> as a promising electrode material for supercapacitor application. </LI> </UL> </P>
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Cross-tabulation Analysis of Indonesian Social Research in the COVID-19 Pandemic
Yusnaini,Nengyanti,Mery Yanti,Anang Dwi Santoso 아시아기술혁신학회 2023 Asian Journal of Innovation and Policy Vol.12 No.1
This study investigates the productivity of Indonesian social scientists during the COVID-19 pandemic, with a particular concentration on their contributions to COVID-19 prevention and management. By categorizing social science research according to themes such as authors' gender, authors' institution of origin, forms of collaboration, and journal quality, this study examines the patterns and factors that influence research output. Using information from the Scopus database, 1,071 journal articles were analyzed in total. The findings indicate that collaborations with foreign researchers considerably improve productivity and publication quality, with Malaysian and Australian institutions serving as the most active partners. Nevertheless, there are gender disparities, as female authors write and are cited less frequently than male authors. The study stresses the importance of increasing international collaboration among Indonesian authors and implementing affirmative action policies to support and empower female researchers. This study contributes to the existing body of knowledge by providing policymakers, funding agencies, and academic institutions with recommendations for fostering a more inclusive and influential research environment in Indonesia.
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Bhange, D.,Ali, G.,Kim, D. H.,Anang, D.,Shin, T.,Kim, M. G.,Kang, Y. M.,Chung, K.,Nam, K. W. Royal Society of Chemistry 2017 Journal of Materials Chemistry A Vol.5 No.3
<P>The need to find sodium ion battery (SIB) cathodes with high voltage, capacity and improved cycle life has stimulated research on sodium containing layered transition metal oxides. With this perspective, the electrochemical properties of highly ordered, honeycomb layered Na3Ni2BiO6 with a monoclinic superstructure are explored as a cathode material in SIBs. It has been demonstrated that Na3Ni2BiO6 delivers a discharge capacity of 106 mA h g(-1), having high voltage plateaus at 3.50 and 3.25 V, with marginal capacity fading after 50 cycles. Operando X-ray diffraction studies during charging/discharging reveal two reversible two-phase transition mechanisms (initial O3 phase -> P3 intermediate phase -> O1 final phase) during sodium extraction. Ex situ X-ray absorption spectroscopy reveals the charge compensation mechanism for the reversible Ni3+/Ni2+ as an active redox couple while Bi5+ being inactive during cycling. Extended X-ray absorption fine structure analysis shows highly reversible local structural changes around both Ni and Bi atoms occurring during electrochemical cycling. In addition, unique local structure changes especially around Ni atoms due to the honeycomb ordering and size mismatch between Ni2+ and Bi5+ ions are revealed by EXAFS analysis during charging and discharging, which is quite different from the local structure changes in regular layer structured NaMO2 (M = transition metals) cathode materials. The present results suggest that honeycomb layered metal oxides with the general formula, Na3M((II)) M-2(V) O-6, can be considered as candidates for high voltage and long life cathode materials for SIBs.</P>
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