{"id":188808,"date":"2024-06-21T14:15:47","date_gmt":"2024-06-21T12:15:47","guid":{"rendered":"https:\/\/www.rse-web.it\/pubblicazioni\/charging-processes-of-na4mn9o18-electrode-in-aqueous-electrolyte\/"},"modified":"2024-07-02T14:28:42","modified_gmt":"2024-07-02T12:28:42","slug":"charging-processes-of-na4mn9o18-electrode-in-aqueous-electrolyte","status":"publish","type":"pubblicazioni","link":"https:\/\/www.rse-web.it\/en\/publications\/charging-processes-of-na4mn9o18-electrode-in-aqueous-electrolyte\/","title":{"rendered":"Charging processes of Na<sub>4<\/sub>Mn<sub>9<\/sub>O<sub>18<\/sub>\u00a0electrode in aqueous electrolyte"},"content":{"rendered":"<p class=\"last-updated-date\">Recently updated on July 2nd, 2024 at 02:28 pm<\/p>","protected":false},"excerpt":{"rendered":"<p>Detailed electrochemical studies were conducted on Na4Mn9O18 electrodes (NMO) in an aqueous electrolyte using cyclic voltammetry (CV) over a wide range of scan rates. CV analysis revealed high sensitivity to the Na ion insertion process and the consequent phenomenological variability in the electrode response. Additionally, we devised an Electrochemical Impedance Spectroscopy (EIS) measurement protocol to determine the contribution of ion insertion from capacitive behavior.<\/p>\n","protected":false},"author":93,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[],"targets":[1314,1317],"pubblicazioni_tipologie":[773],"class_list":["post-188808","pubblicazioni","type-pubblicazioni","status-publish","hentry","targets-press-media-en","targets-research","pubblicazioni_tipologie-isi-article-en"],"acf":{"dont_show_hompage":true,"projects":{"ID":188409,"post_author":"93","post_date":"2024-06-13 15:10:21","post_date_gmt":"2024-06-13 13:10:21","post_content":"","post_title":"Electrochemical and thermal storage technologies","post_excerpt":"The goal of this project is to develop electrochemical and thermal storage technologies with improved performance and greater environmental and economic sustainability by optimizing the use of resources, material formulations and synthesis methods, diagnostic and control processes, and prototype design.","post_status":"publish","comment_status":"open","ping_status":"closed","post_password":"","post_name":"electrochemical-and-thermal-storage-technologies","to_ping":"","pinged":"","post_modified":"2024-07-06 15:23:41","post_modified_gmt":"2024-07-06 13:23:41","post_content_filtered":"","post_parent":0,"guid":"https:\/\/www.rse-web.it\/progetti\/electrochemical-and-thermal-storage-technologies\/","menu_order":0,"post_type":"progetti","post_mime_type":"","comment_count":"0","filter":"raw"},"order_posts":"","dont_show_search":false,"related_posts":false,"show_on_slider":false,"single_post_data":{"titolo_spot":"","post_content":"<p>Recent developments in electrochemical energy storage have sparked renewed interest in aqueous electrolytes. The advent of unconventional systems and the development of nanostructures and\/or hybrid materials necessitate careful analysis of charging processes. This issue has been addressed using sodium manganese oxide (Na4Mn9O18, NMO) as an electrode material operating in an aqueous environment. The charging process was examined using cyclic voltammetry over a wide range of scan rates (\u03bd), and impedance measurements were analyzed using an equivalent circuit to model the electrode response.<\/p>\n<p>&nbsp;<\/p>\n<p>Cyclic voltammetry reveals that at low scan rates (\u03bd \u2264 0.1 mVs\u20131), the charging process is equilibrium-controlled, while at higher scan rates (\u03bd \u2265 0.2 mVs\u20131), it transitions to diffusion-controlled with overlaid capacitive charging. At very high scan rates (\u03bd &gt; 2 mVs\u20131), a mixed ohmic control transport is observed. Impedance analysis discriminates the variable charge storage character, highlighting the dominance of low-frequency faradaic insertion and increasing contributions from high-frequency pseudocapacitive and double-layer charging. We verified that the frequency deconvolution of charge mechanisms from this analysis aligns with CV analysis. For further insights, particularly regarding the aforementioned analysis and as a significant aspect of NMO behavior in general, we evaluated the chemical diffusion coefficient of Na ion as a function of potential.<\/p>\n","scarica_file":false,"link_estreno":[{"link_text":"Download Publication","link":"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0013468622009501?via%3Dihub"}],"button":{"text":"","link":""},"referente_group":false,"data_emissione":"2022-09-10","autori":"M. Soleimanzade, F. Cernuschi (RSE S.p.A.), M. Bahdanchyk, M. Hashempour, M. Bestetti, A. Vicenzo (Politecnico di Milano)","destinazione":"Electrochimica Acta, Vol. 426, N. 140791, September 10, 2022","rif_rse":"22008441"},"satellite_post_url":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Charging processes of Na4Mn9O18\u00a0electrode in aqueous electrolyte - RSE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rse-web.it\/en\/publications\/charging-processes-of-na4mn9o18-electrode-in-aqueous-electrolyte\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Charging processes of Na4Mn9O18\u00a0electrode in aqueous electrolyte - RSE\" \/>\n<meta property=\"og:description\" content=\"Detailed electrochemical studies were conducted on Na4Mn9O18 electrodes (NMO) in an aqueous electrolyte using cyclic voltammetry (CV) over a wide range of scan rates. CV analysis revealed high sensitivity to the Na ion insertion process and the consequent phenomenological variability in the electrode response. 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