國立虎尾科技大學 |

Structural Construction and Surface Modification of Copper Current Collectors for Lithium Metal Batteries.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Structural Construction and Surface Modification of Copper Current Collectors for Lithium Metal Batteries./
Author:	Liang, Yaohua.
Description:	1 online resource (160 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
Contained By:	Dissertations Abstracts International85-11B.
Subject:	Chemistry. -
Online resource:	click for full text (PQDT)
ISBN:	9798382542409

Structural Construction and Surface Modification of Copper Current Collectors for Lithium Metal Batteries.
Liang, Yaohua.

Structural Construction and Surface Modification of Copper Current Collectors for Lithium Metal Batteries. - 1 online resource (160 pages)

Source: Dissertations Abstracts International, Volume: 85-11, Section: B.

Thesis (Ph.D.)--South Dakota State University, 2024.

Includes bibliographical references

Graphene, a prevalent anode material in commercial lithium-ion batteries, has reached its theoretical capacity limit. The imperative is to develop high-capacity anode materials to meet the growing demand for energy density. Lithium metal, renowned for its exceptionally high theoretical specific capacity density (3680 mAh g-1) and low reduction potential (-3.04 V, relative to the standard hydrogen electrode), is commonly dubbed the "Holy Grail" for negative electrode materials in high-energy-density batteries. However, practical advancements in lithium metal anodes face obstacles like low Coulombic efficiency, limited cycle life, and heightened reactivity to the electrolyte and internal short circuits resulting from lithium dendrite growth.In electrochemical systems, the current collector acts as the substrate for lithium metal deposition/stripping, and its surface properties significantly influence the cycle stability of the lithium metal anode. This dissertation systematically designs various interface modification strategies to stabilize lithium metal anodes, considering the surface composition and microstructure design of the anode current collector.The dissertation introduces three innovative surface engineering strategies for modifying copper foil current collectors. Firstly, a three-dimensional structural copper pyramid array (CPA CF) is formed on a flat copper foil (CF) through a straightforward electrodeposition method. This distinctive CPA CF, featuring a substantial surface area and a porous 3D structure, enhances the diffusion of lithium ions and facilitates charge transfer, effectively mitigating the volume change of Li. In the second approach, three-dimensional lithiophilic gold (Au)-coated copper (Cu) pentagonal pyramid arrays (Au CuPPA) are engineered on copper foil utilizing a combination of electrodeposition and chemical reduction methods. With lithiophilic layers and a 3D porous structure, the Au CuPPA enhances the deposition/stripping process of lithium ions and reduces nucleation overpotential. Finally, a facile method is presented where 3D structured cuprous oxide (Cu2O) dendrites are grown on flat copper foil through a simple process involving electrodeposition and subsequent high-temperature treatment. The lithophilic Cu2O layer formed further establishes a favorable channel for the rapid diffusion of lithium ions (Li+) at the solid-liquid interface. The staggered stacking of Cu2O dendrites forms a 3D structure with a significantly increased specific surface area, alleviating current density and promoting the uniform distribution of Li flow.The objective of this dissertation is to establish a lithiophilic interface and devise micro-nano structures on the copper current collector, effectively governing the stable deposition of lithium metal, thereby seeking to advance the practical implementation of lithium metal anodes in high-energy-density battery systems.

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

Mode of access: World Wide Web

ISBN: 9798382542409Subjects--Topical Terms:

593913
Chemistry.
Subjects--Index Terms:

GrapheneIndex Terms--Genre/Form:

554714
Electronic books.

Structural Construction and Surface Modification of Copper Current Collectors for Lithium Metal Batteries.
LDR:04307ntm a22003857 4500 001 1152655
005 20241209114623.5
006 m o d
007 cr mn ---uuuuu
008 250605s2024 xx obm 000 0 eng d
020 $a 9798382542409
035 $a (MiAaPQ)AAI31139579
035 $a AAI31139579
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Liang, Yaohua. $3 1479713
245 1 0 $a Structural Construction and Surface Modification of Copper Current Collectors for Lithium Metal Batteries.
264 0 $c 2024
300 $a 1 online resource (160 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: Dissertations Abstracts International, Volume: 85-11, Section: B.
500 $a Advisor: Gu, Zhengrong.
502 $a Thesis (Ph.D.)--South Dakota State University, 2024.
504 $a Includes bibliographical references
520 $a Graphene, a prevalent anode material in commercial lithium-ion batteries, has reached its theoretical capacity limit. The imperative is to develop high-capacity anode materials to meet the growing demand for energy density. Lithium metal, renowned for its exceptionally high theoretical specific capacity density (3680 mAh g-1) and low reduction potential (-3.04 V, relative to the standard hydrogen electrode), is commonly dubbed the "Holy Grail" for negative electrode materials in high-energy-density batteries. However, practical advancements in lithium metal anodes face obstacles like low Coulombic efficiency, limited cycle life, and heightened reactivity to the electrolyte and internal short circuits resulting from lithium dendrite growth.In electrochemical systems, the current collector acts as the substrate for lithium metal deposition/stripping, and its surface properties significantly influence the cycle stability of the lithium metal anode. This dissertation systematically designs various interface modification strategies to stabilize lithium metal anodes, considering the surface composition and microstructure design of the anode current collector.The dissertation introduces three innovative surface engineering strategies for modifying copper foil current collectors. Firstly, a three-dimensional structural copper pyramid array (CPA CF) is formed on a flat copper foil (CF) through a straightforward electrodeposition method. This distinctive CPA CF, featuring a substantial surface area and a porous 3D structure, enhances the diffusion of lithium ions and facilitates charge transfer, effectively mitigating the volume change of Li. In the second approach, three-dimensional lithiophilic gold (Au)-coated copper (Cu) pentagonal pyramid arrays (Au CuPPA) are engineered on copper foil utilizing a combination of electrodeposition and chemical reduction methods. With lithiophilic layers and a 3D porous structure, the Au CuPPA enhances the deposition/stripping process of lithium ions and reduces nucleation overpotential. Finally, a facile method is presented where 3D structured cuprous oxide (Cu2O) dendrites are grown on flat copper foil through a simple process involving electrodeposition and subsequent high-temperature treatment. The lithophilic Cu2O layer formed further establishes a favorable channel for the rapid diffusion of lithium ions (Li+) at the solid-liquid interface. The staggered stacking of Cu2O dendrites forms a 3D structure with a significantly increased specific surface area, alleviating current density and promoting the uniform distribution of Li flow.The objective of this dissertation is to establish a lithiophilic interface and devise micro-nano structures on the copper current collector, effectively governing the stable deposition of lithium metal, thereby seeking to advance the practical implementation of lithium metal anodes in high-energy-density battery systems.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Chemistry. $3 593913
650 4 $a Materials science. $3 557839
650 4 $a Agricultural engineering. $3 1148660
653 $a Graphene
653 $a Copper foil
653 $a Chemical reduction methods
653 $a Flat copper foil
655 7 $a Electronic books. $2 local $3 554714
690 $a 0794
690 $a 0539
690 $a 0485
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a South Dakota State University. $b Agricultural & Biosystems Engineering. $3 1195250
773 0 $t Dissertations Abstracts International $g 85-11B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31139579 $z click for full text (PQDT)