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Exploring the Li-S System for Next-Generation Batteries.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Exploring the Li-S System for Next-Generation Batteries./
作者:	Wu, David.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	106 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-02, Section: B.
Contained By:	Dissertations Abstracts International83-02B.
標題:	Carbon black. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28483318
ISBN:	9798505572320

Exploring the Li-S System for Next-Generation Batteries.
Wu, David.

Exploring the Li-S System for Next-Generation Batteries. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 106 p.

Source: Dissertations Abstracts International, Volume: 83-02, Section: B.

Thesis (Ph.D.)--Stanford University, 2021.

This item must not be sold to any third party vendors.

Lithium-sulfur (Li-S) batteries have a high theoretical energy density of ~2500 Wh/kg (vs. ~400 Wh/kg of Li-ion batteries) and are promising candidates for meeting future energy storage demands. However, the practical applications of Li-S batteries have been severely hindered by its poor cycling life and stability. In chapter 1, I will give a brief introduction and background. In chapter 2, I will discuss the lithium polysulfide dissolution problem, which is a major problem plaguing Li-S batteries causing fast capacity degradation and poor cycle life. Upon establishing a standard procedure to quantitatively compare the polysulfide adsorption capability of candidate materials, a useful strategy is developed to screen materials and allow for rational design of long cycle life Li-S batteries.In chapter 3, I will further explore the Li-S system via a novel battery scheme by utilizing a P/C nanocomposite anode and pairing it with a Li2S coated carbon nanofiber cathode. It is discovered that the red P anode can be compatible in ether-based electrolyte systems and can be successfully coupled to a Li2S cathode. The new design concept fullcell displays remarkable specific capacity, rate and cycling performances. In chapter 4, I will present a characterization method via rotating disk electrode to further study the Li-S system. This method can be generally applied to various sulfur species, current collectors and electrolyte systems to provide additional insight towards achieving superior rechargeable batteries that can eventually replace Li-ion batteries. Finally in chapter 5, I will give a brief summary, outlook and reflection upon my Ph.D. journey.

ISBN: 9798505572320Subjects--Topical Terms:

3681396
Carbon black.

Exploring the Li-S System for Next-Generation Batteries.
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520 $a Lithium-sulfur (Li-S) batteries have a high theoretical energy density of ~2500 Wh/kg (vs. ~400 Wh/kg of Li-ion batteries) and are promising candidates for meeting future energy storage demands. However, the practical applications of Li-S batteries have been severely hindered by its poor cycling life and stability. In chapter 1, I will give a brief introduction and background. In chapter 2, I will discuss the lithium polysulfide dissolution problem, which is a major problem plaguing Li-S batteries causing fast capacity degradation and poor cycle life. Upon establishing a standard procedure to quantitatively compare the polysulfide adsorption capability of candidate materials, a useful strategy is developed to screen materials and allow for rational design of long cycle life Li-S batteries.In chapter 3, I will further explore the Li-S system via a novel battery scheme by utilizing a P/C nanocomposite anode and pairing it with a Li2S coated carbon nanofiber cathode. It is discovered that the red P anode can be compatible in ether-based electrolyte systems and can be successfully coupled to a Li2S cathode. The new design concept fullcell displays remarkable specific capacity, rate and cycling performances. In chapter 4, I will present a characterization method via rotating disk electrode to further study the Li-S system. This method can be generally applied to various sulfur species, current collectors and electrolyte systems to provide additional insight towards achieving superior rechargeable batteries that can eventually replace Li-ion batteries. Finally in chapter 5, I will give a brief summary, outlook and reflection upon my Ph.D. journey.
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