[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-444055-105":3,"doc-detail-444055-en":80,"detail-sidebar-cat-0-en-105":98},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","enhanced-supercapattery-performance-enabled-by-nitrogen-doped-nb2o5-nanostructures","Enhanced Supercapattery Performance Enabled by Nitrogen-Doped Nb2O5 Nanostructures","","Nitrogen doping is used to enhance the electrochemical performance of transition-metal oxides. Nitrogen-doped niobium oxide (Nb_N) is synthesized by thermal treatment with urea as the nitrogen precursor, and structural/compositional analyses confirm nitrogen incorporation with improved crystallinity and larger crystallites. XPS shows increased oxygen vacancies and Raman indicates local lattice distortion. Electrochemical tests in 2 M KOH demonstrate battery-type behavior, higher specific capacity at 1 A g−1, improved rate capability, and enhanced cycling stability. A Nb_N-based supercapattery achieves high energy and power densities and remains stable over 5000 cycles.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/enhanced-supercapattery-performance-enabled-by-nitrogen-doped-nb2o5-nanostructures/444055/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/enhanced-supercapattery-performance-enabled-by-nitrogen-doped-nb2o5-nanostructures/444055.png","ImageObject",300,407,{"name":42,"@type":43},"นรินทร์","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-04","2026-09-29",true,{"@type":52,"interactionType":53,"userInteractionCount":33},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"How was nitrogen-doped Nb2O5 prepared in this work?","Question",{"text":62,"@type":63},"Nitrogen-doped niobium oxide (Nb_N) was synthesized via thermal treatment using urea as the nitrogen precursor under a nitrogen atmosphere.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"What electrochemical advantages did Nb_N show compared with undoped Nb2O5?",{"text":67,"@type":63},"In 2 M KOH, cyclic voltammetry and galvanostatic charge–discharge tests showed battery-type behavior with higher specific capacity at 1 A g−1, along with improved rate capability and cycling stability.",{"name":69,"@type":60,"acceptedAnswer":70},"What performance did the assembled supercapattery deliver?",{"text":71,"@type":63},"Using Nb_N as the positive electrode and activated carbon as the negative electrode, the supercapattery delivered energy density of 496.65 Wh kg−1 and power density of 2771.99 W kg−1 with remarkable stability over 5000 cycles.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},444055,1790711393,{"code":4,"msg":81,"data":82},"success",{"doc_id":78,"user_id":83,"nickname":42,"user_avatar":84,"doc_module":4,"category_id":85,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":86,"file_id":87,"file_url":88,"file_type":89,"file_size":90,"view_count":33,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":91,"language":92,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":93,"faqs":94,"seo_title":95,"seo_description":12,"update_tm":96,"read_time":97},2336475104957,"https://ap-avatar.wpscdn.com/avatar/22000c4c6bd8a5076e1?x-image-process=image/resize,m_fixed,w_180,h_180&k=1787554080175789136",8,"This article is licensed under CC-BY 4.0   \n[http://pubs.acs.org/journal/acsodf](http://pubs.acs.org/journal/acsodf)  Article   \nEnhanced Supercapattery Performance Enabled by Nitrogen-Doped Nb2O5 Nanostructures  \nFernando José Soares Barros, * Samuel da Silva Eduardo, Klebson Lucas Pereira Cardozo, Hector A. Vitorino, Carlos Martins Aiube, Mariana Lumi Ichihara Sado, Camila de Lima Ribeiro, Alysson Martins Almeida Silva, Francisco Murilo Tavares de Luna, and Auro Atsushi Tanaka *  \n Cite This: ACS Omega 2025, 10, 59004−59020  \nRead Online  \n\n|  |  |  |  |  |  |\n| --- | --- | --- | --- | --- | --- |\n| ACCESS   | Metrics & More |  |  Article Recommendations |  | *sı Supporting Information |\n\nABSTRACT: Nitrogen doping has emerged as a strategy to enhance the electrochemical performance of transition metal oxides. In this work, nitrogen-doped niobium oxide (Nb_N) was synthesized via a thermal treatment using urea as the nitrogen precursor. Structural and compositional analyses of Nb_N confirmed successful nitrogen incorporation without phase changes, leading to improved crystallinity and larger crystallites, with XPS revealing increased oxygen vacancies and Raman analysis indicating local lattice distortion. Electrochemical performance was evaluated in a 2 M KOH electrolyte. Cyclic voltammetry and galvanostatic charge−discharge tests revealed a battery-type electrode behavior with higher specific capacity values at 1 A g−1 for Nb_N (1297.37 C g−1) compared to the undoped Nb_U (1108.75 C g−1). Moreover, Nb_N demonstrated rate capability and superior cycling stability. A supercapattery assembled with Nb_N as the positive electrode and activated carbon as the negative electrode delivered an energy density of 496.65 Wh kg−1 and a power density of 2771.99 W kg−1, with remarkable stability over 5000 cycles. Nitrogen doping enhanced the structural and electronic properties of Nb2O5, improving its pseudocapacitive behavior and making it suitable for high-performance supercapatteries.  \n1. INTRODUCTION  \nThe growing need for cleaner power has accelerated the adoption of technologies such as solar and wind. Their generation, however, is variable because it depends on weather conditions. Storage systems mitigate this by retaining surplus electricity and supplying it during shortfalls, ensuring more stable output. In view of climate concerns and the impact of fossil fuels, combining renewables with effective storage is essential for a sustainable energy future. 1,2  \nEnergy storage devices include batteries, capacitors, and supercapacitors, each with distinct characteristics.3,4 Among these, the concept of a “supercapattery” has emerged to unify hybrid systems that combine the attributes of supercapacitors and batteries.6 Supercapatteries leverage both capacitive and noncapacitive Faradaic charge storage mechanisms, making them distinct from traditional devices. This unified term encompasses a range of hybrid devices previously referred to as redox capacitors, Li-ion capacitors, Na-ion capacitors, hybrid electrochemical capacitors, battery−supercapacitor hybrids, and pseudocapacitors.5,6  \nRecent efforts have focused on transition metal oxides as electrode materials due to their multifunctional properties.7,8 Amonng them, nanostructured ruthenium oxide,9 manganese oxide, 10 spinel ferrites, 11 and cobalt oxide 12 have been extensively investigated for supercapatteries.12 Niobium and its oxides have attracted attention in fields ranging from catalysis to energy storage. Nb-based materials exhibit excellent performance in photocatalysis and as solid acid catalysts, with Nb2O5 demonstrating considerable catalytic activity for water decomposition and organic transformations.13 In electrochemical energy storage, Nb2O5 has been applied in both supercapacitors and lithium/sodium-ion batteries due to its intercalation capacity and pseudocapacitive behavior. 14, 15  \n\n| Received: August 7, 2025\u003Cbr>Revised: November 4, 2025\u003Cbr>Accepted: November 18, 2","cbCaiiMHfas3uR1V","https://ap.wps.com/l/cbCaiiMHfas3uR1V","pdf",11939669,17,"English","# ABSTRACT\n## 1. INTRODUCTION\n## 2. EXPERIMENTAL SECTION\n### 2.1. Preparation of the Electrode Material","[{\"question\":\"How was nitrogen-doped Nb2O5 prepared in this work?\",\"answer\":\"Nitrogen-doped niobium oxide (Nb_N) was synthesized via thermal treatment using urea as the nitrogen precursor under a nitrogen atmosphere.\"},{\"question\":\"What electrochemical advantages did Nb_N show compared with undoped Nb2O5?\",\"answer\":\"In 2 M KOH, cyclic voltammetry and galvanostatic charge–discharge tests showed battery-type behavior with higher specific capacity at 1 A g−1, along with improved rate capability and cycling stability.\"},{\"question\":\"What performance did the assembled supercapattery deliver?\",\"answer\":\"Using Nb_N as the positive electrode and activated carbon as the negative electrode, the supercapattery delivered energy density of 496.65 Wh kg−1 and power density of 2771.99 W kg−1 with remarkable stability over 5000 cycles.\"}]","Enhanced Supercapattery Performance Enabled by Nitrogen-Doped Nb2O5 Nanostructures | PDF",1790706712,43,{"code":4,"msg":81,"data":99},[100,104,108,112,117,122,127,130,135,138,142],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":101,"show_sort_weight":102,"slug":103},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":105,"show_sort_weight":106,"slug":107},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":109,"show_sort_weight":110,"slug":111},"Exam",70,"exam",{"id":113,"doc_module":4,"doc_module_name":25,"category_name":114,"show_sort_weight":115,"slug":116},5,"Comic",60,"comic",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":119,"show_sort_weight":120,"slug":121},6,"Technology",50,"technology",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":125,"slug":126},7,"Healthcare",40,"healthcare",{"id":85,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":128,"slug":129},30,"research-report",{"id":131,"doc_module":4,"doc_module_name":25,"category_name":132,"show_sort_weight":133,"slug":134},9,"Religion & Spirituality",20,"religion-spirituality",{"id":133,"doc_module":4,"doc_module_name":25,"category_name":136,"show_sort_weight":133,"slug":137},"World Cup","world-cup",{"id":139,"doc_module":4,"doc_module_name":25,"category_name":140,"show_sort_weight":139,"slug":141},10,"Lifestyle","lifestyle",{"id":143,"doc_module":4,"doc_module_name":25,"category_name":144,"show_sort_weight":113,"slug":145},19,"General","general"]