{"id":5199,"date":"2026-06-15T07:04:49","date_gmt":"2026-06-15T07:04:49","guid":{"rendered":"https:\/\/cognitionconferences.com\/nanotechnology\/?post_type=speaker&#038;p=5199"},"modified":"2026-06-24T11:20:41","modified_gmt":"2026-06-24T11:20:41","slug":"younjung-jo","status":"publish","type":"speaker","link":"https:\/\/cognitionconferences.com\/nanotechnology\/speaker\/younjung-jo\/","title":{"rendered":"Younjung Jo"},"content":{"rendered":"<p>Fe<sub>3<\/sub>O<sub>4<\/sub> is a promising pseudocapacitive electrode material, but its poor electrical conductivity limits rate performance. Here, we report a rapid 1-min thermal CVD strategy to synthesize FeO<sub>x<\/sub>\/multilayer graphene core\u2013shell nanocomposites. During the process, partial reduction of Fe<sub>3<\/sub>O<sub>4<\/sub> generated Fe-rich catalytic sites that enabled graphitic carbon shell formation. Temperature-dependent analysis showed that 1000 \u00b0C produced uniform multilayer graphene shells with improved crystallinity, whereas lower or higher temperatures resulted in poorly crystalline or defective carbon layers. The optimized electrode delivered a specific capacitance of 267 F g<sup>-1<\/sup> at 0.5 A g<sup>-1<\/sup>, retained 45% capacitance at 20 A g<sup>-1<\/sup>, and maintained 81% retention after 6000 cycles. The enhanced performance is attributed to combined Fe<sup>2+<\/sup>\/Fe<sup>3+<\/sup> pseudocapacitive reactions and efficient electron transport through the conductive graphene network. These findings demonstrate a scalable CVD-based approach for designing high-performance transition-metal-oxide electrodes for energy storage applications. This work has been published in the Journal of Alloys and Compounds (2026), DOI: 10.1016\/j.jallcom.2026.189204.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"featured_media":5198,"template":"","meta":{"_acf_changed":false},"schedule":[5],"speaker-category":[6],"class_list":["post-5199","speaker","type-speaker","status-publish","has-post-thumbnail","hentry","schedule-day-1","speaker-category-speakers"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Younjung Jo | Kyungpook National University | South Korea<\/title>\n<meta name=\"description\" content=\"Laboratory, USA. She has over 20 years of research experience in strongly correlated oxides, two-dimensional materials, and quantum transport phenomena under extreme conditions, including high magnetic fields and high pressure.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cognitionconferences.com\/nanotechnology\/speaker\/younjung-jo\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Younjung Jo | Kyungpook National University | South Korea\" \/>\n<meta property=\"og:description\" content=\"Laboratory, USA. She has over 20 years of research experience in strongly correlated oxides, two-dimensional materials, and quantum transport phenomena under extreme conditions, including high magnetic fields and high pressure.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cognitionconferences.com\/nanotechnology\/speaker\/younjung-jo\/\" \/>\n<meta property=\"og:site_name\" content=\"Cognition Conferences\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-24T11:20:41+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cognitionconferences.com\/nanotechnology\/wp-content\/uploads\/2026\/06\/Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Stem-Cell.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1545\" \/>\n\t<meta property=\"og:image:height\" content=\"2000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/nanotechnology\\\/speaker\\\/younjung-jo\\\/\",\"url\":\"https:\\\/\\\/cognitionconferences.com\\\/nanotechnology\\\/speaker\\\/younjung-jo\\\/\",\"name\":\"Younjung Jo | Kyungpook National University | South Korea\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/nanotechnology\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/nanotechnology\\\/speaker\\\/younjung-jo\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/cognitionconferences.com\\\/nanotechnology\\\/speaker\\\/younjung-jo\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cognitionconferences.com\\\/nanotechnology\\\/wp-content\\\/uploads\\\/2026\\\/06\\\/Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Stem-Cell.png\",\"datePublished\":\"2026-06-15T07:04:49+00:00\",\"dateModified\":\"2026-06-24T11:20:41+00:00\",\"description\":\"Laboratory, USA. 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