國立虎尾科技大學 |

Effect of various ceramic precursors on the mechanical, thermal, and electrochemical properties of polymer/ceramic nanofiber separators for lithium ion batteries.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Effect of various ceramic precursors on the mechanical, thermal, and electrochemical properties of polymer/ceramic nanofiber separators for lithium ion batteries./
Author:	Smith, Soshana Adele.
Description:	1 online resource (148 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
Contained By:	Dissertation Abstracts International78-04B(E).
Subject:	Chemical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369319811

Effect of various ceramic precursors on the mechanical, thermal, and electrochemical properties of polymer/ceramic nanofiber separators for lithium ion batteries.
Smith, Soshana Adele.

Effect of various ceramic precursors on the mechanical, thermal, and electrochemical properties of polymer/ceramic nanofiber separators for lithium ion batteries. - 1 online resource (148 pages)

Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

Researchers have been incorporated ceramics into porous membrane separators as a way to improve their mechanical, thermal and battery performances. However, the inclusion of preformed ceramics within the polymer membrane can require multiple additional steps. Current methods of ceramic particle inclusion in the polymer network can lead to issues of particle aggregation which can leads to non-uniform membrane performance. Ceramics present on the surface can delaminate from the surface, which would negatively affect the membrane performance. For this study, we aimed to incorporate room temperature curable liquid ceramic precursors into polymer networks to fabricate polymer/ceramic hybrids in a single electrospinning step.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369319811Subjects--Topical Terms:

555952
Chemical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Effect of various ceramic precursors on the mechanical, thermal, and electrochemical properties of polymer/ceramic nanofiber separators for lithium ion batteries.
LDR:04441ntm a2200361Ki 4500 001 910701
005 20180517112608.5
006 m o u
007 cr mn||||a|a||
008 190606s2016 xx obm 000 0 eng d
020 $a 9781369319811
035 $a (MiAaPQ)AAI10183860
035 $a AAI10183860
040 $a MiAaPQ $b eng $c MiAaPQ
099 $a TUL $f hyy $c available through World Wide Web
100 1 $a Smith, Soshana Adele. $3 1182131
245 1 0 $a Effect of various ceramic precursors on the mechanical, thermal, and electrochemical properties of polymer/ceramic nanofiber separators for lithium ion batteries.
264 0 $c 2016
300 $a 1 online resource (148 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
502 $a Thesis (Ph.D.) $c Cornell University $d 2016.
504 $a Includes bibliographical references
520 $a Researchers have been incorporated ceramics into porous membrane separators as a way to improve their mechanical, thermal and battery performances. However, the inclusion of preformed ceramics within the polymer membrane can require multiple additional steps. Current methods of ceramic particle inclusion in the polymer network can lead to issues of particle aggregation which can leads to non-uniform membrane performance. Ceramics present on the surface can delaminate from the surface, which would negatively affect the membrane performance. For this study, we aimed to incorporate room temperature curable liquid ceramic precursors into polymer networks to fabricate polymer/ceramic hybrids in a single electrospinning step.
520 $a First, we combined polyacrylonitrile (PAN) and organopolysilazane (OPSZ) to successfully create polymer-ceramic membranes without the need for further post-treatment. We varied the amount of ceramic precursor added to investigate the effect of ceramic loading on membrane properties and its electrochemical performance. Results show that with increasing as the amount of ceramic, there is an improvement in the mechanical strength and thermal stability of the membranes. There is also an increase in ionic conductivity with increased ceramic inclusion as the presence of the ceramic disrupts the polymers ability to crystallize. The increased ionic conductivity correlated to an increase in battery performance and capacity retention especially at high charge/discharge rates. We note that all nanofiber based separators in the current study have the similar porosity around 80%, and they exhibit a wide range of the rate capability performances due to their different internal and surface morphologies of nanofibers which in turn affect the ionic conductivity.
520 $a We then used various organopolysilazanes with different ratios of tetraethyl orthosilicate (TEOS) pendant chain to polysilazane backbone to investigate the effect of ceramic structures on the membrane performance. Our results demonstrate that changing to the TEOS to polysilazane ratio can affect that the ceramics ability to form a continuous network within the polymer at the same concentration. The ability to form continuous network increases the amorphous regions within the polymer network, leading to an increase in the ionic conductivity which in turn leads to better battery performance.
520 $a We note that using OPSZ shows an approximately 5 nm ceramic sheath layer forms on the fibers. In order to investigate the effect of this ceramic sheath layer, we incorporated various silica precursors which resulted in various polymer-ceramic morphologies, ranging from no sheath layer, partial sheath layers, and to full shear layer on the polymer/ceramic fibers. Our results reveal that the presence of ceramic sheath layer leads to better membrane-electrolyte interaction which caused the increase in electrolyte uptake and ionic uptake. Additionally, the ceramic on the sheath layer can aid in preventing the buildup of fluorine based particles on the surface on the fiber, leading to improved capacity retention.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Chemical engineering. $3 555952
650 4 $a Engineering. $3 561152
655 7 $a Electronic books. $2 local $3 554714
690 $a 0542
690 $a 0537
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Cornell University. $b Fiber Science and Apparel Design. $3 1182132
773 0 $t Dissertation Abstracts International $g 78-04B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10183860 $z click for full text (PQDT)