Výsledky vyhledávání

Quaternized chitosan-based anion exchange membrane for alkaline direct methanol fuel cells

Autor: Chan-Hwa Chung, Jeongkwan Ryu, Woo Jae Kim, Jung Yong Seo, Bit Na Choi

Publikováno v: Journal of Industrial and Engineering Chemistry. 73:254-259

We synthesized a novel quaternized anion exchange membrane (AEM) that exhibits high ionic conductivity and structural stability, even under high pH conditions, by copolymerizing a chitosan-based membrane with vinylimidazole derivatives. During the pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44c24ba38ef5726dea0043c3bd5108d6
https://doi.org/10.1016/j.jiec.2019.01.033

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Effect of morphological change of copper-oxide fillers on the performance of solid polymer electrolytes for lithium-metal polymer batteries

Autor: Yong Seok Kim, Chan-Hwa Chung, Jin Hoon Yang, Bit Na Choi

Publikováno v: RSC Advances. 9:21760-21770

Solid polymer electrolytes (SPEs) for Li-metal polymer batteries are prepared, in which poly(ethylene oxide) (PEO), lithium bis(trifluoromethylsulfonyl)imide (LiTFSI), and copper-oxide fillers are formulated. Their structural and electrochemical prop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8adc4b543192dfb467723b75d34a7464
https://doi.org/10.1039/c9ra03555a

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An in-situ spectroscopic study on the photochemical CO2 reduction on CsPbBr3 perovskite catalysts embedded in a porous copper scaffold

Autor: Pil J. Yoo, Jung Yong Seo, Chan-Hwa Chung, Zongfu An, Bit Na Choi

Publikováno v: Chemical Engineering Journal. 430:132807

v Photocatalytic CO2 reduction is a technology which converts carbon dioxide into high value-added chemicals, simultaneously resulting in a reduction of carbon dioxide and the production of useful chemicals. To increase the conversion efficiency and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb578507f12b9f49f790b53932e65d8c
https://doi.org/10.1016/j.cej.2021.132807

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Exploring applicability of communicational approach for variable concept learning

Autor: Sang-Ho Choi, Hye-Kyung Jung, Bit-Na Choi, Ju-Hui Lee

Publikováno v: Korean Association For Learner-Centered Curriculum And Instruction. 18:203-224

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5792326953b4786612778ad041e1e2a8
https://doi.org/10.22251/jlcci.2018.18.15.203

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Electrochemical Deposition of NiCo Magnetic Layer on the Aluminum Substrate

Autor: Jeong Kwan Ryu, Bit Na Choi, Youn-Chul Kim, Chan-Hwa Chung

Publikováno v: Science of Advanced Materials. 9:1610-1615

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::92dfdd4a4dce2353e3aad816ce0bdbf6
https://doi.org/10.1166/sam.2017.3180

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Capacitance enhancement in supercapacitors by incorporating ultra-long hydrated vanadium-oxide nanobelts into graphene

Autor: Kai Zhuo, Chan-Hwa Chung, Jong Wook Bae, Aniu Qian, So Jeong Lee, Bit Na Choi, Pil J. Yoo

Publikováno v: Journal of Alloys and Compounds. 688:814-821

The oriented synthesis of high-performance nanobelt/graphene hybrids remains a challenge by one-step environmentally friendly process for supercapacitors. Here, PEG-6000 manipulation was employed to facilitate ultra-long V 2 O 5 ·0.5H 2 O nanobelts

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d4d02adc9033a5133773d59319a6c68
https://doi.org/10.1016/j.jallcom.2016.07.222

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Effect of Heat Treatment on the Electrochemical Properties of Mn Oxide-Based Powder Prepared Using a Wet Chemical Process

Autor: Woo Won Chun, Myung Sik Shin, Bit Na Choi, Aniu Qian, Jong Wook Bae, Chan-Hwa Chung

Publikováno v: Science of Advanced Materials. 8:89-95

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f69a7c46cccc09b5396c0fe52c78f96f
https://doi.org/10.1166/sam.2016.2607

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Electro-deposition of the lithium metal anode on dendritic copper current collectors for lithium battery application

Autor: Yong Seok Kim, Jung Yong Seo, Chan-Hwa Chung, Bit Na Choi, Byeongkyu Kim

Publikováno v: Applied Surface Science. 506:144884

Lithium metal is a promising material for high-energy density lithium battery application because of its high theoretical capacity value. However, during the cycling process, growth of lithium dendrites and change in volume are the two major issues l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ea1d4205b4432956c23060d66917723
https://doi.org/10.1016/j.apsusc.2019.144884

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Surfactant Effects on the Morphology and Pseudocapacitive Behavior of V2O5⋅H2O

Autor: Bit Na Choi, Aniu Qian, Woo Won Chun, Kai Zhuo, Chan-Hwa Chung, Myung Sik Shin

Publikováno v: ChemSusChem. 8:2399-2406

To overcome the drawback of low electrical conductivity within supercapacitor applications, several surfactants are used for nanoscale V2 O5 to enhance the specific surface area. Polyethylene glycol 6000 (PEG-6000), sodium dodecylbenzene sulfonate (S

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4f6e511c165b6c9a43aadc043483ca3
https://doi.org/10.1002/cssc.201403477

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