Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Yung-Eun Sung"'
Publikováno v:
Materials Chemistry and Physics. 183:11-17
In this study, two modified polyol methods (I and II) were proposed to improve the alloying degree of PtRu nanoparticles. A 20 wt% PtRu/C catalyst was successfully synthesized using modified polyol method I, in which a metal precursor-ethylene glycol
Publikováno v:
The Journal of Physical Chemistry C. 120:9028-9035
Methanol is a promising fuel for direct methanol fuel cells in portable devices. A deeper understanding of its electro-oxidation is needed for evaluating electrocatalytic performance and catalyst design. Here we provide an in-depth investigation of t
Autor:
Yun Sik Kang, Minhyoung Kim, Jaeyoon Baik, Stanfield Youngwon Lee, Dong Young Chung, Kwang-Hyun Choi, Docheon Ahn, M. J. Lee, Heejong Shin, Kug-Seung Lee, Yung-Eun Sung, Mi-Ju Kim
Publikováno v:
Journal of Power Sources. 303:234-242
Composition-controlled and carbon-supported PdFe nanoparticles (NPs) were prepared via a modified chemical synthesis after heat-treatment at high temperature under a reductive atmosphere. This novel synthesis, which combines the polyol reduction meth
Autor:
Dong Jun Lee, Soon Gu Kwon, Myoung Hwan Oh, Kisuk Kang, Aihua Jin, Mihyun Park, Hyeon Seok Lee, Kug-Seung Lee, Ji Eun Lee, Seung Ho Yu, Taeghwan Hyeon, Yung-Eun Sung
Publikováno v:
Journal of the American Chemical Society. 137:11954-11961
We report a simple synthetic method of carbon-based hybrid cellular nanosheets that exhibit outstanding electrochemical performance for many key aspects of lithium-ion battery electrodes. The nanosheets consist of close-packed cubic cavity cells part
Autor:
Dirk Henkensmeier, Min Kyung Cho, Yi Young Kim, Jonghee Han, Dae Nyung Lee, EunAe Cho, Jong Hyun Jang, Sehkyu Park, Hyoung-Juhn Kim, Tae Hoon Lim, Yung-Eun Sung, Sung Jong Yoo
Publikováno v:
International Journal of Hydrogen Energy. 39:16548-16555
Herein we report the spatially uneven degradation of a polymer electrolyte membrane fuel cell (PEMFC) stack operated under load variation. Fifteen sub-membrane electrode assemblies (sub-MEAs) at various cell positions and various points within each c
Publikováno v:
Electrochimica Acta. 136:47-51
In this paper, we present a simple method for scalable synthesis of uniform carbon nanoshell coated monodispersed iron oxide nanocrystals and report on the electrochemical performances of such nanocomposites. The structure and morphology of the resul
Publikováno v:
Journal of Applied Electrochemistry. 44:789-796
Cubic and star-shaped CaSnO3 particles with a perovskite structure were synthesized successfully using a simple hydrothermal method at a low temperature of 140 °C. The structure and morphology of the CaSnO3 powders were characterized using X-ray dif
Carbon treated self-ordered TiO2 nanotube arrays with enhanced lithium-ion intercalation performance
Publikováno v:
Journal of Alloys and Compounds. 597:275-281
Vertically aligned TiO2 nanotube (TONT) arrays on titanium substrate developed by facile electrochemical anodization in an aqueous solution of 0.5 M Na2SO4, 0.5 M H3PO4, 0.2 M sodium citrate, and 0.5 wt% NaF were prepared having a pore diameter and t
Autor:
Ji-Hoon Lee, Ju-Won Lee, Kyung Jae Lee, Mohammad Al-Mamun, Sung-Ryong Kim, Jae-Yup Kim, Insik In, Young-Hui Ko, Yung-Eun Sung
Publikováno v:
Synthetic Metals. 177:77-81
Solution processed hybrid silver nanowire (AgNW)-graphene nanoplatelets (GNP) films were prepared and the electrocatalytic activity for the cobalt redox electrolyte in dye-sensitized solar cells (DSSCs) was examined. Cyclic voltammograms and Tafel po
Publikováno v:
Journal of nanoscience and nanotechnology. 15(10)
New types of niobates negative electrode were studied for using in lithium-ion batteries in order to alternate metallic lithium anodes. The potassium intercalated compound KCa2Nb3O10 and proton intercalated compound HCa2Nb3O10 were studied, and the e