{"id":39618,"date":"2020-03-11T09:40:42","date_gmt":"2020-03-11T07:40:42","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=39618"},"modified":"2020-04-01T17:38:16","modified_gmt":"2020-04-01T15:38:16","slug":"des-micro-supercondensateurs-pour-alimenter-linternet-des-objets","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/actualites\/des-micro-supercondensateurs-pour-alimenter-linternet-des-objets.html","title":{"rendered":"Micro-supercapacitors to power the Internet of Things"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_1m6rk7r1xgcoa\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-39618'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-36afc10ea827d8478b81bc28a513c19f\">\n#top .av-special-heading.av-av_heading-36afc10ea827d8478b81bc28a513c19f{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-av_heading-36afc10ea827d8478b81bc28a513c19f .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-36afc10ea827d8478b81bc28a513c19f .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-36afc10ea827d8478b81bc28a513c19f av-special-heading-h3  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h3 class='av-special-heading-tag'  itemprop=\"headline\"  >Micro-supercapacitors to power the Internet of Things<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-k7n0k7oq-ea711753a9369e3edcc9fa946a3e8f95'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><blockquote>\n<p>Supercapacitors are the solution of choice for supplying energy to connected objects, especially when their electrodes are made of vanadium nitride. However, the origin of this material's performance was still unknown. Researchers at the IEMN at the University of Nantes have now elucidated the process and discovered a way of using it for micro-supercapacitors (MSCs). This work, published in the journal <em>Energy &amp; Environmental Science<\/em>This paves the way for extremely powerful and robust MSCs.<\/p>\n<\/blockquote>\n<\/div><\/section>\n<section  class='av_textblock_section av-k7n0m4r1-fa4ebcfa8811cbf7ce98813e7d695374'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h4>How vanadium nitride will power the Internet of Things<\/h4>\n<\/div><\/section>\n<section  class='av_textblock_section av-k7n0nftj-df2ed7fd2f78cbe48ff4d603bfdea4a7'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Micro-supercapacitors (MSCs) are accompanying the popularity of connected objects, but their energy storage still needs to be improved against a backdrop of increasing miniaturisation. Vanadium nitride, for example, is used in large supercapacitors, but it is incorporated in powder form, which is incompatible with miniaturisation. Researchers at the Institut d'\u00e9lectronique, de micro\u00e9lectronique et de nanotechnologies (<a class=\"ext\" href=\"https:\/\/www.iemn.fr\/en\/\" target=\"_blank\" rel=\"noopener noreferrer\">IEMN<\/a>CNRS\/Universit\u00e9 polytechnique Hauts-de-France\/Universit\u00e9 de Lille\/Centrale Lille), the Institut des mat\u00e9riaux Jean Rouxel (<a class=\"ext\" href=\"https:\/\/www.cnrs-imn.fr\/\" target=\"_blank\" rel=\"noopener noreferrer\">IMN<\/a>CNRS\/Universit\u00e9 de Nantes) and the Catalysis and Solid State Chemistry Unit (<a class=\"ext\" href=\"http:\/\/uccs.univ-lille1.fr\/index.php\/fr\/\" target=\"_blank\" rel=\"noopener noreferrer\">UCCS<\/a>CNRS\/Universit\u00e9 d'Artois\/Universit\u00e9 de Lille\/Centrale Lille) have elucidated the charge storage process in vanadium nitride, after using this material for the first time in MSCs. The team was supported by the Electrochemical Energy Storage Network (<a class=\"ext\" href=\"https:\/\/www.energie-rs2e.com\/fr\" target=\"_blank\" rel=\"noopener noreferrer\">RS2E<\/a>) and the Renatech network.<\/p>\n<p>The researchers used an industrial microelectronics process: magnetron cathode sputtering. A metallic vanadium pebble is subjected to ionised gases and then condensed on a silicon substrate. The material delivers an electrical storage capacity per unit volume (&gt; 700 F cm<sup>-3<\/sup>) four times greater than that of nanoporous carbon electrodes. This MSC retains more than 80 % of its initial performance after 50,000 charge\/discharge cycles, whereas most MSCs wear out after 10,000 cycles. Using analyses carried out in part at the Soleil synchrotron, the researchers showed that this performance was due to the presence of a tiny layer of vanadium oxide, which forms naturally when the electrodes are in contact with the air. It is this layer that stores the electrical charges, without involving the rest of the material, which therefore deteriorates much more slowly.<\/p>\n<div id=\"attachment_39622\" style=\"width: 516px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/03\/Supercondensateurs.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-39622\" class=\"wp-image-39622\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2020\/03\/Supercondensateurs.jpg\" alt=\"\" width=\"506\" height=\"485\" \/><\/a><p id=\"caption-attachment-39622\" class=\"wp-caption-text\">Study of the charge storage mechanism in vanadium nitride integrated as a micro-supercapacitor electrode. (c) IEMN<\/p><\/div>\n<\/div><\/section>\n<section  class='av_textblock_section av-k7n14arl-a2e326a03745a18d56c8da9cdf2e90f1'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Reference:<\/strong><\/p>\n<p>Novel insights into the charge storage mechanism in pseudocapacitive vanadium nitride thick films for high-performance on-chip microsupercapacitors,<br \/>\nK. Robert, D. Sti\u00e9venard, D. Deresmes, C. Douard, A. Iadecola, D. Troadec, P. Simon, N. Nuns, M. Marinova, M. Huv\u00e9, P. Roussel, T. Brousse and C. Lethien.<br \/>\nEnergy &amp; Environmental Science, 2020<br \/>\nDOI: <a href=\"https:\/\/pubs.rsc.org\/en\/content\/articlelanding\/2020\/EE\/C9EE03787J#!divAbstract\" target=\"_blank\" rel=\"noopener noreferrer\">doi.org\/10.1039\/C9EE03787J<\/a><\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-k5880yzp-ee131e426626e8783d1e411d5f0e1416'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='avia-button-wrap av-rpqvoq-736fd1bcd5360b3eb9fd38e56b959002-wrap avia-button-left  avia-builder-el-8  avia-builder-el-no-sibling'><a href='mailto:christophe.lethien@univ-lille.fr'  class='avia-button av-rpqvoq-736fd1bcd5360b3eb9fd38e56b959002 av-link-btn avia-icon_select-yes-left-icon avia-size-small avia-position-left avia-color-silver'   aria-label=\"Contact: Christophe LETHIEN\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >Contact: Christophe LETHIEN<\/span><\/a><\/div>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":39626,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,30,299,297],"tags":[205,237,42,300,289,290],"class_list":["post-39618","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-breves","category-news-2","category-newsletter","tag-energie","tag-energy","tag-iemn","tag-nl1","tag-supercondensateur","tag-vanadium"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/39618","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=39618"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/39618\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/39626"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=39618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=39618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=39618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}