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Understanding the Dynamics of Ion Locking in Doubly-Polymerized Ionic Liquids.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Understanding the Dynamics of Ion Locking in Doubly-Polymerized Ionic Liquids./
作者:	Arora, Swati.
面頁冊數:	1 online resource (165 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-10, Section: B.
Contained By:	Dissertations Abstracts International84-10B.
標題:	Fuel cells. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30359489click for full text (PQDT)
ISBN:	9798377684961

Understanding the Dynamics of Ion Locking in Doubly-Polymerized Ionic Liquids.
Arora, Swati.

Understanding the Dynamics of Ion Locking in Doubly-Polymerized Ionic Liquids. - 1 online resource (165 pages)

Source: Dissertations Abstracts International, Volume: 84-10, Section: B.

Thesis (Ph.D.)--University of Pittsburgh, 2023.

Includes bibliographical references

olling the dynamics of ion motion in polymerized ionic liquids remains enticing for the development of advanced organic electronics. Previous studies have extensively reported ion dynamics in singly polymerized ionic liquids (SPILs). However, a lot needs to be uncovered with regards to a molecular-level understanding of dynamics in "doubly polymerized" ionic liquids, or DPILs, in which both ionic species are covalently linked to polymer chains. Polymerizing both the ionic species in an ionic liquid drastically decreases the ionic conductivity and lock the ions in place. While intentionally restricting the ion motion may be counterintuitive, given that a large focus of the polymerized ionic liquid community has so far been optimizing ion transport without sacrificing mechanical properties, it has been recently shown that "locking" ions in place in polymeric materials can actually enable new classes of organic electronics, which has been an important motivation for our work.Significantly deeper fundamental understanding, however is needed to examine the factors that influence the time duration until which the ions can be locked in place called as the "electric double layer" (EDL) retention time. To investigate these questions, we characterized these materials using Broadband dielectric spectroscopy (BDS) over a broad frequency and temperature range.The dielectric studies demonstrate that the polymerization of both the ionic species in DPIL not only radically reduces the bulk conductivities of the material significantly, but also slows the relaxation timescales corresponding to ionic rearrangement by more than four orders of magnitude relative to SPILs which we attributed to ionic interactions effectively forming physical crosslinks between the polymer chains.Understanding the fundamental mechanisms of ion locking in these materials, and using this knowledge to inform design rules for tunable functional device, will be critical in moving these applications forward. Thus, this study will stimulate advances for investigating the fundamental properties of ion-containing polymers and developing DPIL as promising materials in novel device applications.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798377684961Subjects--Topical Terms:

645135
Fuel cells.
Index Terms--Genre/Form:

542853
Electronic books.

Understanding the Dynamics of Ion Locking in Doubly-Polymerized Ionic Liquids.
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520 $a olling the dynamics of ion motion in polymerized ionic liquids remains enticing for the development of advanced organic electronics. Previous studies have extensively reported ion dynamics in singly polymerized ionic liquids (SPILs). However, a lot needs to be uncovered with regards to a molecular-level understanding of dynamics in "doubly polymerized" ionic liquids, or DPILs, in which both ionic species are covalently linked to polymer chains. Polymerizing both the ionic species in an ionic liquid drastically decreases the ionic conductivity and lock the ions in place. While intentionally restricting the ion motion may be counterintuitive, given that a large focus of the polymerized ionic liquid community has so far been optimizing ion transport without sacrificing mechanical properties, it has been recently shown that "locking" ions in place in polymeric materials can actually enable new classes of organic electronics, which has been an important motivation for our work.Significantly deeper fundamental understanding, however is needed to examine the factors that influence the time duration until which the ions can be locked in place called as the "electric double layer" (EDL) retention time. To investigate these questions, we characterized these materials using Broadband dielectric spectroscopy (BDS) over a broad frequency and temperature range.The dielectric studies demonstrate that the polymerization of both the ionic species in DPIL not only radically reduces the bulk conductivities of the material significantly, but also slows the relaxation timescales corresponding to ionic rearrangement by more than four orders of magnitude relative to SPILs which we attributed to ionic interactions effectively forming physical crosslinks between the polymer chains.Understanding the fundamental mechanisms of ion locking in these materials, and using this knowledge to inform design rules for tunable functional device, will be critical in moving these applications forward. Thus, this study will stimulate advances for investigating the fundamental properties of ion-containing polymers and developing DPIL as promising materials in novel device applications.
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