10.1002\/aenm.202000100<\/a><\/p>\nAuthors:<\/h4>\n
Shijian Jin, Eric M. Fell, Lucia Vina-Lopez, Yan Jing, P. Winston Michalak, Roy G. Gordon, Michael J. Aziz<\/p>\n
Abstract:<\/h4>\n
Abstract A highly stable phosphonate\u2010functionalized viologen is introduced as the redox\u2010active material in a negative potential electrolyte for aqueous redox flow batteries (ARFBs) operating at nearly neutral pH. The solubility is 1.23 m and the reduction potential is the lowest of any substituted viologen utilized in a flow battery, reaching \u22120.462 V versus SHE at pH = 9. The negative charges in both the oxidized and the reduced states of 1,1\u2032\u2010bis(3\u2010phosphonopropyl)\u2010[4,4\u2032\u2010bipyridine]\u20101,1\u2032\u2010diium dibromide ( BPP\u2212Vi ) effect low permeability in cation exchange membranes and suppress a bimolecular mechanism of viologen decomposition. A flow battery pairing BPP\u2212Vi with a ferrocyanide\u2010based positive potential electrolyte across an inexpensive, non\u2010fluorinated cation exchange membrane at pH = 9 exhibits an open\u2010circuit voltage of 0.9 V and a capacity fade rate of 0.016% per day or 0.00069% per cycle. Overcharging leads to viologen decomposition, causing irreversible capacity fade. This work introduces extremely stable, extremely low\u2010permeating and low reduction potential redox active materials into near neutral ARFBs.<\/p>\n","protected":false},"excerpt":{"rendered":"
DOI: 10.1002\/aenm.202000100 Authors: Shijian Jin, Eric M. Fell, Lucia Vina-Lopez, Yan Jing, P. Winston Michalak, Roy G. Gordon, Michael J. Aziz Abstract: Abstract A highly stable phosphonate\u2010functionalized viologen is introduced as the redox\u2010active material in a negative potential electrolyte for aqueous redox flow batteries (ARFBs) operating at nearly neutral pH. The solubility is 1.23 m […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[34,40],"class_list":["post-1163","post","type-post","status-publish","format-standard","hentry","category-vsp-300-potentiostat","tag-battery","tag-redox-flow-battery"],"_links":{"self":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1163","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=1163"}],"version-history":[{"count":0,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1163\/revisions"}],"wp:attachment":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}