{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/99451"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/99451","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Electrochemical mechanisms in nano-structured graphitic and redox-active polymeric architectures","abstract":"One of the greatest challenges for our modern society is developing efficient and low-cost electrochemical energy storage and conversion systems for stationary and transportation applications. Understanding the detailed electrochemical mechanisms in energy-related materials with new designs and modification methods will help us break the ceiling of current existing systems. The goal of my Ph.D. is to combine the power of versatile electrochemistry techniques and materials with diversified architecture, and explore various mechanisms of different nano-structured energy storage and conversion materials. The first part of this dissertation explores the application of ultra-thin graphene as an electronically transparent and physically impermeable interface. Outer-sphere reactions on metal substrate-modulated graphene prove the electronic transparency of the graphene interface. Inner-sphere oxygen reduction reaction activity changes demonstrate the electronic coupling between metal substrates and molecular adlayers above graphene. This work provides new strategies for systematically tuning the electrocatalytic reactivity using hybridized electrocatalyst structures. The second part of this dissertation utilizes few layer graphene as an ultra-thin bulk material that can reversibly intercalate alkali ions. The finite thickness of graphene leads to layer number-controlled Li-ion intercalation behavior. Passivating the few layer graphene surface can selectively facilitate stable K-ion intercalation while suppressing the K plating reaction. The last part of this dissertation introduces redox-active polymers and advanced redox-active colloids as electrochemical energy storage carriers, which have shown facile charge transfer kinetics and good charge storage ability. Combining these macromolecular electrolytes with size-exclusion porous membranes provides a potential solution to current ionic conductivity restriction in non-aqueous redox flow batteries.","abstract_html":"One of the greatest challenges for our modern society is developing efficient and low-cost electrochemical energy storage and conversion systems for stationary and transportation applications. Understanding the detailed electrochemical mechanisms in energy-related materials with new designs and modification methods will help us break the ceiling of current existing systems. The goal of my Ph.D. is to combine the power of versatile electrochemistry techniques and materials with diversified architecture, and explore various mechanisms of different nano-structured energy storage and conversion materials. The first part of this dissertation explores the application of ultra-thin graphene as an electronically transparent and physically impermeable interface. Outer-sphere reactions on metal substrate-modulated graphene prove the electronic transparency of the graphene interface. Inner-sphere oxygen reduction reaction activity changes demonstrate the electronic coupling between metal substrates and molecular adlayers above graphene. This work provides new strategies for systematically tuning the electrocatalytic reactivity using hybridized electrocatalyst structures. The second part of this dissertation utilizes few layer graphene as an ultra-thin bulk material that can reversibly intercalate alkali ions. The finite thickness of graphene leads to layer number-controlled Li-ion intercalation behavior. Passivating the few layer graphene surface can selectively facilitate stable K-ion intercalation while suppressing the K plating reaction. The last part of this dissertation introduces redox-active polymers and advanced redox-active colloids as electrochemical energy storage carriers, which have shown facile charge transfer kinetics and good charge storage ability. Combining these macromolecular electrolytes with size-exclusion porous membranes provides a potential solution to current ionic conductivity restriction in non-aqueous redox flow batteries.","abstract_has_math":false,"creators":["Hui, Jingshu"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Materials Science & Engr","degree_department":null,"school":null,"contributors":["Rodríguez-López, Joaquín","Dillon, Shen J.","Braun, Paul V.","Cheng, Jianjun"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-03-13T17:28:57Z","date_published":"2018-03-13T17:28:57Z","updated_at":"2026-07-22T22:24:37Z","subjects":["Electrochemistry","Energy storage materials","Graphene","Redox-active polymers","Scanning electrochemical microscopy"],"languages":["en"],"rights":["Copyright 2017 Jingshu Hui"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/99451","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Rodríguez-López, Joaquín","Dillon, Shen J.","Braun, Paul V.","Cheng, Jianjun"]},{"key":"dc:creator","label":"Author","values":["Hui, Jingshu"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-03-13T17:28:57Z","2020-03-14T09:15:31Z","2017-08-14","2017-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science & Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Electrochemistry","Energy storage materials","Graphene","Redox-active polymers","Scanning electrochemical microscopy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Jingshu Hui"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/99451"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["One of the greatest challenges for our modern society is developing efficient and low-cost electrochemical energy storage and conversion systems for stationary and transportation applications. Understanding the detailed electrochemical mechanisms in energy-related materials with new designs and modification methods will help us break the ceiling of current existing systems. The goal of my Ph.D. is to combine the power of versatile electrochemistry techniques and materials with diversified architecture, and explore various mechanisms of different nano-structured energy storage and conversion materials. The first part of this dissertation explores the application of ultra-thin graphene as an electronically transparent and physically impermeable interface. Outer-sphere reactions on metal substrate-modulated graphene prove the electronic transparency of the graphene interface. Inner-sphere oxygen reduction reaction activity changes demonstrate the electronic coupling between metal substrates and molecular adlayers above graphene. This work provides new strategies for systematically tuning the electrocatalytic reactivity using hybridized electrocatalyst structures. The second part of this dissertation utilizes few layer graphene as an ultra-thin bulk material that can reversibly intercalate alkali ions. The finite thickness of graphene leads to layer number-controlled Li-ion intercalation behavior. Passivating the few layer graphene surface can selectively facilitate stable K-ion intercalation while suppressing the K plating reaction. The last part of this dissertation introduces redox-active polymers and advanced redox-active colloids as electrochemical energy storage carriers, which have shown facile charge transfer kinetics and good charge storage ability. Combining these macromolecular electrolytes with size-exclusion porous membranes provides a potential solution to current ionic conductivity restriction in non-aqueous redox flow batteries.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2019-12-01","The student, Jingshu Hui, accepted the attached license on 2017-08-08 at 08:55.","The student, Jingshu Hui, submitted this Dissertation for approval on 2017-08-08 at 09:08.","This Dissertation was approved for publication on 2017-08-14 at 14:28.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11598 on 2018-03-13 at 10:32:07","Made available in DSpace on 2018-03-13T17:28:57Z (GMT). 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Understanding the detailed electrochemical mechanisms in energy-related materials with new designs and modification methods will help us break the ceiling of current existing systems. The goal of my Ph.D. is to combine the power of versatile electrochemistry techniques and materials with diversified architecture, and explore various mechanisms of different nano-structured energy storage and conversion materials. The first part of this dissertation explores the application of ultra-thin graphene as an electronically transparent and physically impermeable interface. Outer-sphere reactions on metal substrate-modulated graphene prove the electronic transparency of the graphene interface. Inner-sphere oxygen reduction reaction activity changes demonstrate the electronic coupling between metal substrates and molecular adlayers above graphene. This work provides new strategies for systematically tuning the electrocatalytic reactivity using hybridized electrocatalyst structures. The second part of this dissertation utilizes few layer graphene as an ultra-thin bulk material that can reversibly intercalate alkali ions. The finite thickness of graphene leads to layer number-controlled Li-ion intercalation behavior. Passivating the few layer graphene surface can selectively facilitate stable K-ion intercalation while suppressing the K plating reaction. The last part of this dissertation introduces redox-active polymers and advanced redox-active colloids as electrochemical energy storage carriers, which have shown facile charge transfer kinetics and good charge storage ability. Combining these macromolecular electrolytes with size-exclusion porous membranes provides a potential solution to current ionic conductivity restriction in non-aqueous redox flow batteries.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2019-12-01","The student, Jingshu Hui, accepted the attached license on 2017-08-08 at 08:55.","The student, Jingshu Hui, submitted this Dissertation for approval on 2017-08-08 at 09:08.","This Dissertation was approved for publication on 2017-08-14 at 14:28.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11598 on 2018-03-13 at 10:32:07","Made available in DSpace on 2018-03-13T17:28:57Z (GMT). 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