國立虎尾科技大學 |

Electrochemical Transport in Energy Storage Systems.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Electrochemical Transport in Energy Storage Systems./
Author:	Li, Weiyu.
Description:	1 online resource (156 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-04, Section: B.
Contained By:	Dissertations Abstracts International85-04B.
Subject:	Electrolytes. -
Online resource:	click for full text (PQDT)
ISBN:	9798380483292

Electrochemical Transport in Energy Storage Systems.
Li, Weiyu.

Electrochemical Transport in Energy Storage Systems. - 1 online resource (156 pages)

Source: Dissertations Abstracts International, Volume: 85-04, Section: B.

Thesis (Ph.D.)--Stanford University, 2023.

Includes bibliographical references

Rechargeable lithium batteries are electrochemical devices widely used in portable electronics and electric-powered vehicles. A breakthrough in battery performance requires advancements in battery cell configurations at the microscale level. This, in turn, places a premium on the ability to accurately predict complex multiphase thermo-electrochemical phenomena, e.g., migration of ions interacting with composite porous materials that constitute a battery cell microstructure.Optimal design of porous cathodesrequires efficient quantitative models of microscopic (pore-scale) electrochemical processes and their impact on battery performance. We derive effective properties (electrical conductivity, ionic diffusivity, reaction parameters) of a composite electrode comprising the active material coated with a mixture of the binder and conductor (the carbon binder domain or CBD). These effective descriptors ensure the conservation of mass and charge. When used to parameterize industry-standard pseudo-two-dimensional (P2D) models, they significantly improve the predictions of lithiation curves in the presence of CBD. We identified a P2D model that provides a middle ground between model complexity and prediction accuracy.On the lithium anode, dendritic growth is a leading cause of degradation and catastrophic failure of batteries with lithium anodes, e.g., lithium-metal batteries and all-solid-state lithium batteries. Deep understanding of this phenomenon would facilitate the design of strategies to reduce, or completely suppress, the instabilities characterizing electrodeposition on the lithium anode. We present linear stability analyses to quantify the interfacial instability associated with dendrite formation in terms of the battery's operating conditions and the electrochemical and physical properties of battery materials. This would improve the safety of lithium-metal batteries with liquid electrolyte and all-solid-state lithium batteries.When considered holistically, the quantitative nature of our work provides mechanistic insights into the optimal design of i) porous cathodes, ii) electrolytes, and iii) dendrite-suppressing buffers between the lithium-metal anode and electrolyte. The design of electrolytes involves the optimal selection of a solvent and salt, the tuning of the ionic concentration of the solution, and the deployment of anisotropic electrolytes (e.g., liquid crystals, liquid-crystalline physical gels, and the use of separators with anisotropic pore structures or columnized membranes).

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798380483292Subjects--Topical Terms:

1162927
Electrolytes.
Index Terms--Genre/Form:

554714
Electronic books.

Electrochemical Transport in Energy Storage Systems.
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502 $a Thesis (Ph.D.)--Stanford University, 2023.
504 $a Includes bibliographical references
520 $a Rechargeable lithium batteries are electrochemical devices widely used in portable electronics and electric-powered vehicles. A breakthrough in battery performance requires advancements in battery cell configurations at the microscale level. This, in turn, places a premium on the ability to accurately predict complex multiphase thermo-electrochemical phenomena, e.g., migration of ions interacting with composite porous materials that constitute a battery cell microstructure.Optimal design of porous cathodesrequires efficient quantitative models of microscopic (pore-scale) electrochemical processes and their impact on battery performance. We derive effective properties (electrical conductivity, ionic diffusivity, reaction parameters) of a composite electrode comprising the active material coated with a mixture of the binder and conductor (the carbon binder domain or CBD). These effective descriptors ensure the conservation of mass and charge. When used to parameterize industry-standard pseudo-two-dimensional (P2D) models, they significantly improve the predictions of lithiation curves in the presence of CBD. We identified a P2D model that provides a middle ground between model complexity and prediction accuracy.On the lithium anode, dendritic growth is a leading cause of degradation and catastrophic failure of batteries with lithium anodes, e.g., lithium-metal batteries and all-solid-state lithium batteries. Deep understanding of this phenomenon would facilitate the design of strategies to reduce, or completely suppress, the instabilities characterizing electrodeposition on the lithium anode. We present linear stability analyses to quantify the interfacial instability associated with dendrite formation in terms of the battery's operating conditions and the electrochemical and physical properties of battery materials. This would improve the safety of lithium-metal batteries with liquid electrolyte and all-solid-state lithium batteries.When considered holistically, the quantitative nature of our work provides mechanistic insights into the optimal design of i) porous cathodes, ii) electrolytes, and iii) dendrite-suppressing buffers between the lithium-metal anode and electrolyte. The design of electrolytes involves the optimal selection of a solvent and salt, the tuning of the ionic concentration of the solution, and the deployment of anisotropic electrolytes (e.g., liquid crystals, liquid-crystalline physical gels, and the use of separators with anisotropic pore structures or columnized membranes).
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Electrolytes. $3 1162927
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650 4 $a Electrodes. $3 581312
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650 4 $a Electricity distribution. $3 1413617
650 4 $a Carbon. $3 557161
650 4 $a Conductivity. $3 1384182
650 4 $a Electric fields. $3 903633
650 4 $a Porous materials. $3 596885
650 4 $a Batteries. $3 1388610
650 4 $a Energy storage. $3 677971
650 4 $a Lithium. $3 904879
650 4 $a Composite materials. $3 561730
650 4 $a Electromagnetics. $3 1178899
650 4 $a Energy. $3 784773
650 4 $a Materials science. $3 557839
650 4 $a Physics. $3 564049
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710 2 $a Stanford University. $3 1184533
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