10.1002\/aenm.202301944<\/a><\/p>\nAuthors:<\/h4>\n
Gustav \u00c5vall, Guillermo A. Ferrero, Knut Jan\u00dfen, Moritz Exner, Youhyun Son, Philipp Adelhelm<\/p>\n
Abstract:<\/h4>\n
Abstract For Li\u2010ion and Na\u2010ion batteries, the intercalation behavior of graphite anodes is quite different. While Li\u2010ions intercalate, Na\u2010ions only co\u2010intercalate with solvent molecules from the electrolyte solution leading to ternary graphite intercalation compound (t\u2010GIC) formation along with an expansion of the graphite interlayer spacing to 1.2 nm. This large interlayer spacing represents a micropore with parallel slit geometry. Little is known about t\u2010GIC formation, but it is commonly believed that throughout the reaction the ion is accompanied by either a full or partial solvation shell. Here, it is elucidated for the first time, using two independent methods \u2013 mass measurements and electrochemical impedance spectroscopy \u2013 supplemented by operando microscopy, entropymetry and simulations, that the storage mechanism is far more complex. A new model for the electrochemical solvent co\u2010intercalation process is proposed: As soon as solvated ions enter, the graphite structure is flooded with free solvents, which are subsequently replaced by solvated ions. Close to full sodiation, few free solvents remain and structural rearrangement take place to reach the full storage capacity. Thus, t\u2010GICs represent a unique case of switchable microporous systems and hence appear as a bridge between ion storage in the bulk phase and in micropores, i.e., between batteries and supercapacitors.<\/p>\n","protected":false},"excerpt":{"rendered":"
DOI: 10.1002\/aenm.202301944 Authors: Gustav \u00c5vall, Guillermo A. Ferrero, Knut Jan\u00dfen, Moritz Exner, Youhyun Son, Philipp Adelhelm Abstract: Abstract For Li\u2010ion and Na\u2010ion batteries, the intercalation behavior of graphite anodes is quite different. While Li\u2010ions intercalate, Na\u2010ions only co\u2010intercalate with solvent molecules from the electrolyte solution leading to ternary graphite intercalation compound (t\u2010GIC) formation along with […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[35],"class_list":["post-69","post","type-post","status-publish","format-standard","hentry","category-bcs-800-battery-cycler","tag-supercapacitors"],"_links":{"self":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/69","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=69"}],"version-history":[{"count":0,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/69\/revisions"}],"wp:attachment":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=69"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=69"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=69"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}