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Electro-Chemo-Mechanics of Solids : = Application to All-Solid-State Batteries, Polyelectrolyte Gels, and Actuators.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Electro-Chemo-Mechanics of Solids :/
其他題名:	Application to All-Solid-State Batteries, Polyelectrolyte Gels, and Actuators.
作者:	Narayan, Sooraj.
面頁冊數:	1 online resource (256 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-02, Section: B.
Contained By:	Dissertations Abstracts International85-02B.
標題:	Aqueous solutions. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30672280click for full text (PQDT)
ISBN:	9798380097307

Electro-Chemo-Mechanics of Solids : = Application to All-Solid-State Batteries, Polyelectrolyte Gels, and Actuators.
Narayan, Sooraj.

Electro-Chemo-Mechanics of Solids :Application to All-Solid-State Batteries, Polyelectrolyte Gels, and Actuators. - 1 online resource (256 pages)

Source: Dissertations Abstracts International, Volume: 85-02, Section: B.

Thesis (Ph.D.)--Massachusetts Institute of Technology, 2023.

Includes bibliographical references

In several solid systems, including batteries and various electrochemically-based actuators, charged ions are transported across a solid host material under the influence of electric fields and concentration gradients, which can cause local volumetric expansion and contraction. Since stresses and strains are transmitted very effectively in solids, the chemical expansion leads to significant stress generation in the host material. These stresses also influence the movement of ions, and thus electrochemistry and mechanics are highly coupled in such systems. The overarching theme of this thesis is the theoretical formulation and numerical simulation of such systems. This thesis is divided into two major parts: Part 1. All-solid-state lithium metal batteries: While all-solid-state batteries, which use solid electrolytes (SE), are safer than conventional liquid electrolyte based systems, they are currently plagued by major challenges leading to cell failure, such as lithium filament growth through the SE, fracture of the SE, and decohesion of the anode and the SE. In order to aid and advance our understanding of the mechanisms that lead to these various modes of failure, we have mathematically modeled the electrodeposition and attendant large viscoplastic deformation of lithium at the anodeSE interface of an all-solid-state lithium metal battery (ASSLMB). Through numerical finite-element implementation of our model, we have studied the deleterious effects of plating-and-stripping of lithium around interfacial chemical or mechanical defects in ASSLMBs. Our simulations reveal the role of charging/discharging current levels, cell stack pressure, and other mechanical constraints of the system on possible failure mechanisms of such cells. Part 2. Polyelectrolyte polymers: Ionizable polymeric gels which mechanically respond to electrostatic/chemical stimuli are useful in artificial muscles, artificial skin, and drug delivery applications (among others). We have formulated a thermodynamically-consistent, fully-coupled, theoretical electro-chemo-mechanical framework accounting for large deformations, electrostatic influence on charged species, and simultaneous cross-diffusional transport of multiple mobile species. We have suitably specialized this general framework to model: (i) ionic polymer-metal composites, (ii) ionotronic devices, and (iii) polyelectrolyte gels. Using the finite-element simulation capabilities that we developed for each case, we have successfully validated our models against experiments from the literature. We also show many applications of these materials in technologically-relevant actuators, which demonstrate the utility of our numerical modeling capabilities as a tool for designing ionotronic devices and electro-chemo-mechanical actuators.

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

Mode of access: World Wide Web

ISBN: 9798380097307Subjects--Topical Terms:

3681511
Aqueous solutions.
Index Terms--Genre/Form:

542853
Electronic books.

Electro-Chemo-Mechanics of Solids : = Application to All-Solid-State Batteries, Polyelectrolyte Gels, and Actuators.
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245 1 0 $a Electro-Chemo-Mechanics of Solids : $b Application to All-Solid-State Batteries, Polyelectrolyte Gels, and Actuators.
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500 $a Source: Dissertations Abstracts International, Volume: 85-02, Section: B.
500 $a Advisor: Anand, Lallit.
502 $a Thesis (Ph.D.)--Massachusetts Institute of Technology, 2023.
504 $a Includes bibliographical references
520 $a In several solid systems, including batteries and various electrochemically-based actuators, charged ions are transported across a solid host material under the influence of electric fields and concentration gradients, which can cause local volumetric expansion and contraction. Since stresses and strains are transmitted very effectively in solids, the chemical expansion leads to significant stress generation in the host material. These stresses also influence the movement of ions, and thus electrochemistry and mechanics are highly coupled in such systems. The overarching theme of this thesis is the theoretical formulation and numerical simulation of such systems. This thesis is divided into two major parts: Part 1. All-solid-state lithium metal batteries: While all-solid-state batteries, which use solid electrolytes (SE), are safer than conventional liquid electrolyte based systems, they are currently plagued by major challenges leading to cell failure, such as lithium filament growth through the SE, fracture of the SE, and decohesion of the anode and the SE. In order to aid and advance our understanding of the mechanisms that lead to these various modes of failure, we have mathematically modeled the electrodeposition and attendant large viscoplastic deformation of lithium at the anodeSE interface of an all-solid-state lithium metal battery (ASSLMB). Through numerical finite-element implementation of our model, we have studied the deleterious effects of plating-and-stripping of lithium around interfacial chemical or mechanical defects in ASSLMBs. Our simulations reveal the role of charging/discharging current levels, cell stack pressure, and other mechanical constraints of the system on possible failure mechanisms of such cells. Part 2. Polyelectrolyte polymers: Ionizable polymeric gels which mechanically respond to electrostatic/chemical stimuli are useful in artificial muscles, artificial skin, and drug delivery applications (among others). We have formulated a thermodynamically-consistent, fully-coupled, theoretical electro-chemo-mechanical framework accounting for large deformations, electrostatic influence on charged species, and simultaneous cross-diffusional transport of multiple mobile species. We have suitably specialized this general framework to model: (i) ionic polymer-metal composites, (ii) ionotronic devices, and (iii) polyelectrolyte gels. Using the finite-element simulation capabilities that we developed for each case, we have successfully validated our models against experiments from the literature. We also show many applications of these materials in technologically-relevant actuators, which demonstrate the utility of our numerical modeling capabilities as a tool for designing ionotronic devices and electro-chemo-mechanical actuators.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Aqueous solutions. $3 3681511
650 4 $a Polymers. $3 535398
650 4 $a Partial differential equations. $3 2180177
650 4 $a Electrodes. $3 629151
650 4 $a Tension tests. $3 3689348
650 4 $a Stress-strain curves. $3 3560389
650 4 $a Bending stresses. $3 3563164
650 4 $a Boundary conditions. $3 3560411
650 4 $a Lithium. $3 1638490
650 4 $a Hydrogels. $3 1305894
650 4 $a Condensed matter physics. $3 3173567
650 4 $a Mechanics. $3 525881
650 4 $a Solid state physics. $3 518873
650 4 $a Mechanical engineering. $3 649730
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0346
690 $a 0548
690 $a 0611
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Massachusetts Institute of Technology. $b Department of Mechanical Engineering. $3 3704001
773 0 $t Dissertations Abstracts International $g 85-02B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30672280 $z click for full text (PQDT)