{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/107568"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/107568","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Metal metaphosphate complexes for redox flow batteries","abstract":"In this thesis, possibility of using anionic metal complexes to limit crossover of active species in redox flow batteries was explored. A series of first row transition metal trimetaphosphate complexes as bis(triphenylphosphine)iminium (PPN) salts have been prepared. Their electrochemical properties have been studied to evaluate them for redox flow battery applications. [PPN]₃[Fe(P₃Og)₂] and [PPN]₂[VO(P₃O₉)(acac)] were identified as a suitable couple for a dual-active-species redox flow battery with an open cell potential of 1.5 V. [PPN]₃[V(P₃Og)₂] can be oxidized and reduced within the stability window of acetonitrile and it is therefor a promising candidate for single-active-species redox flow battery applications. The difference in redox potentials between the V(III)/V(IV) and V(II)/V(III) couples is 2.7 V which is the highest peak to peak separation reported in the literature to date.","abstract_html":"In this thesis, possibility of using anionic metal complexes to limit crossover of active species in redox flow batteries was explored. A series of first row transition metal trimetaphosphate complexes as bis(triphenylphosphine)iminium (PPN) salts have been prepared. Their electrochemical properties have been studied to evaluate them for redox flow battery applications. [PPN]₃[Fe(P₃Og)₂] and [PPN]₂[VO(P₃O₉)(acac)] were identified as a suitable couple for a dual-active-species redox flow battery with an open cell potential of 1.5 V. [PPN]₃[V(P₃Og)₂] can be oxidized and reduced within the stability window of acetonitrile and it is therefor a promising candidate for single-active-species redox flow battery applications. The difference in redox potentials between the V(III)/V(IV) and V(II)/V(III) couples is 2.7 V which is the highest peak to peak separation reported in the literature to date.","abstract_has_math":false,"creators":["Avena, Laura"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Chemistry.","school":null,"contributors":[],"advisors":["Christopher C. Cummins."],"committee_chairs":[],"committee_members":[],"year":2016,"date_issued":"2016","date_published":"2016","updated_at":"2026-07-22T22:21:26Z","subjects":["Chemistry."],"languages":["eng"],"rights":["MIT theses are protected by copyright. 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A series of first row transition metal trimetaphosphate complexes as bis(triphenylphosphine)iminium (PPN) salts have been prepared. Their electrochemical properties have been studied to evaluate them for redox flow battery applications. [PPN]₃[Fe(P₃Og)₂] and [PPN]₂[VO(P₃O₉)(acac)] were identified as a suitable couple for a dual-active-species redox flow battery with an open cell potential of 1.5 V. [PPN]₃[V(P₃Og)₂] can be oxidized and reduced within the stability window of acetonitrile and it is therefor a promising candidate for single-active-species redox flow battery applications. The difference in redox potentials between the V(III)/V(IV) and V(II)/V(III) couples is 2.7 V which is the highest peak to peak separation reported in the literature to date."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["S.M."]},{"key":"dc:title","label":"Title","values":["Metal metaphosphate complexes for redox flow batteries"]}]}],"canonical_facts":{"dc:contributor.advisor":["Christopher C. Cummins."],"dc:contributor.department":["Massachusetts Institute of Technology. Department of Chemistry."],"dc:contributor.other":["Massachusetts Institute of Technology. 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[PPN]₃[V(P₃Og)₂] can be oxidized and reduced within the stability window of acetonitrile and it is therefor a promising candidate for single-active-species redox flow battery applications. The difference in redox potentials between the V(III)/V(IV) and V(II)/V(III) couples is 2.7 V which is the highest peak to peak separation reported in the literature to date."],"dc:description.degree":["S.M."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/107568"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Chemistry."],"dc:title":["Metal metaphosphate complexes for redox flow batteries"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:21:26Z"}