GeFe2O4, an intriguing anode material for sodium ion batteries based on conversion and alloying reactions, suffered from drawbacks related to excessive volume expansion during sodiatiom\/desodiation and poor electronic conductivity. In order to avoid these issues, Mn substitution and proper carbon coating can be adopted, providing so a positive effect on the capacity values at a low current densities (about 350 mAh\/g at about 350 mAh\/g at C\/5 for the pure one).<\/p>\n","protected":false},"author":93,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"tags":[1300,1301],"targets":[1304,1317],"pubblicazioni_tipologie":[773],"class_list":["post-204319","pubblicazioni","type-pubblicazioni","status-publish","hentry","tag-industrial-sector","tag-sodium-ion-batteries","targets-industrial-world","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":"
GeFe2O4 (GFO), with its intriguing intercalation mechanism based on alloying\u2013conversion reactions, was recently proposed as an anode material for sodium ion batteries (SIBs). However, drawbacks related to excessive volume expansion during intercalation\/deintercalation and poor electronic conductivity enormously hinder its practical application in batteries.<\/p>\n
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In this regard, some experimental strategies such as cation substitutions and proper architectures\/carbon coatings can be adopted. In this paper, pure and Mn-doped GFO samples were prepared by hydrothermal synthesis. The doped samples maintained the spinel cubic structure and the morphology of pure GFO.<\/p>\n
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The electrochemical tests of the samples, performed after proper carbon coating, showed the expected redox processes involving both Ge and Fe ions. The Mn doping had a positive effect on the capacity values at a low current density (about 350 mAh\/g at C\/5 for the Mn 5% doping in comparison to 300 mAh\/g for the pure sample). Concerning the cycling stability, the doped samples were able to provide 129 mAh\/g (Mn 10%) and 150 mAh\/g (Mn 5%) at C\/10 after 60 cycles.<\/p>\n","scarica_file":false,"link_estreno":[{"link_text":"Download Publication","link":""}],"button":{"text":"","link":""},"referente_group":false,"data_emissione":"2024-01-27","autori":"M. Ambrosetti, W. Rocchetta, V. Berbenni, M. Bini (Universit\u00e0 di Pavia), I. Quinzeni (RSE S.p.A.), C. Milanese (C.S.G.I., Consorzio Per i Sistemi a Grande Interfase)","destinazione":"MDPI Batteries, 27 Gennaio 2024, Vol. 10, Issue 2","rif_rse":"24000502"},"satellite_post_url":""},"yoast_head":"\n