10.1002\/admi.202100704<\/a><\/p>\nAuthors:<\/h4>\n
Lukas Seidl, Rabeb Grissa, Leiting Zhang, Sigita Trabesinger, Corsin Battaglia<\/p>\n
Abstract:<\/h4>\n
Abstract Using galvanostatic techniques, an oxidative stability up to 4.6 V versus Li\/Li + and beyond has been reported for the prototypical polymer electrolyte consisting of 1 m lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in poly(ethylene oxide) (PEO). However, no long\u2010term cycling of a battery with this high cut\u2010off voltage has been demonstrated. Electrochemical and spectroscopic\/spectrometric methods are employed to critically reinvestigate the electrochemical oxidation mechanisms of PEO electrolytes. It is found that the onset of PEO oxidation occurs at much lower voltage of around 3.2 V versus Li\/Li + , at which the terminal O\uf8ffH group is deprotonated. At 3.6 V, the chain of the PEO is oxidized. Both processes result in the formation of the strong acid HTFSI, which in turn chemically attacks the PEO to form methanol and 2\u2010methoxyethanol. A stable cycling of a solid\u2010state lithium\u2010metal battery with a high\u2010energy LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) posititve electrode to an upper cut\u2010off voltage of 3.6 V versus Li\/Li + is demonstrated, however, resulting in enhanced capacity fading when increasing the upper cut\u2010off voltage to 3.8 V versus Li\/Li + or higher. Thus, operating PEO electrolytes beyond 3.6 V versus Li\/Li + requires protective layers at the positive electrode\u2010electrolyte interface to prevent PEO oxidation.<\/p>\n","protected":false},"excerpt":{"rendered":"
DOI: 10.1002\/admi.202100704 Authors: Lukas Seidl, Rabeb Grissa, Leiting Zhang, Sigita Trabesinger, Corsin Battaglia Abstract: Abstract Using galvanostatic techniques, an oxidative stability up to 4.6 V versus Li\/Li + and beyond has been reported for the prototypical polymer electrolyte consisting of 1 m lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in poly(ethylene oxide) (PEO). However, no long\u2010term cycling of a […]<\/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":[34],"class_list":["post-1016","post","type-post","status-publish","format-standard","hentry","category-bcs-800-battery-cycler","tag-battery"],"_links":{"self":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1016","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=1016"}],"version-history":[{"count":0,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1016\/revisions"}],"wp:attachment":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}