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Electrode and Electrolyte Design to Develop Advanced Battery Technologies for Large Scale Energy Storage.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Electrode and Electrolyte Design to Develop Advanced Battery Technologies for Large Scale Energy Storage./
作者:	He, Wei.
面頁冊數:	1 online resource (164 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
標題:	Electrical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30316917click for full text (PQDT)
ISBN:	9798379504946

Electrode and Electrolyte Design to Develop Advanced Battery Technologies for Large Scale Energy Storage.
He, Wei.

Electrode and Electrolyte Design to Develop Advanced Battery Technologies for Large Scale Energy Storage. - 1 online resource (164 pages)

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Thesis (Ph.D.)--South Dakota State University, 2023.

Includes bibliographical references

Large-scale energy storage devices play a key role in regulating the renewable energy to build a carbon-free sustainable future, but the widely used lithium-ion batteries cannot meet the demands because of the limited lithium resource and high cost. Thus, it is urgent to develop next-generation battery technologies with low cost and high safety. Sodium-ion battery is considered as a promising candidate due to the abundant sodium resources and low cost. Its practical application, however, is hindered by the absence of the advanced electrode materials. The tin-based anodes deliver high theoretical capacities and show great promise for the sodium-ion batteries, but the large volume expansion upon cycling can damage the structure and lead to short cycling life. In this dissertation, three tin-base anodes have been developed. First, a free-standing Sn CFC electrode was synthesized via the electrospinning method. The carbon fiber and Sn nanoparticles together provide fast ions and electrons pathway, enabling a dominant pseudocapacitance contribution. Moreover, the facile manufacturing technique yields the Sn CFC electrode with a high mass loading. Second, a novel anode was designed with a pomegranate-like structure that the SnP2O7 nanoparticles dispersed in the robust N-doped carbon matrix. The carbon matrix forms strong interaction with the SnP2O7 nanoparticles, leading to a stable structure without any particle aggregation. Third, a SnS/Sb2S3 heterostructure was prepared and encapsulated in the sulfur and nitrogen co-doped carbon matrix with engineered porous structure. The porous structure can provide void space to alleviate the volume expansion upon cycling, guaranteeing excellent structural stability. The unique heterostructure and the S, N co-doped carbon matrix together facilitate fast-charge transport to improve reaction kinetics. Aqueous zinc-ion batteries show great promise in large-scale energy storage. However, the decomposition of water molecules leads to severe side reactions, resulting in the limited lifespan of the zinc-ion batteries. Here, the tetrahydrofuran additive was introduced into the zinc sulfate electrolyte to reduce the water activity by modulating the solvation structure of the Zn hydration layer. Thus, in an optimal 2 M ZnSO4/THF (5% by volume) electrolyte, the hydrogen evolution reaction and byproduct precipitation can be suppressed, which greatly improves the cycling stability and Coulombic efficiency.

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

Mode of access: World Wide Web

ISBN: 9798379504946Subjects--Topical Terms:

649834
Electrical engineering.
Subjects--Index Terms:

Aqueous zinc-ion batteriesIndex Terms--Genre/Form:

542853
Electronic books.

Electrode and Electrolyte Design to Develop Advanced Battery Technologies for Large Scale Energy Storage.
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504 $a Includes bibliographical references
520 $a Large-scale energy storage devices play a key role in regulating the renewable energy to build a carbon-free sustainable future, but the widely used lithium-ion batteries cannot meet the demands because of the limited lithium resource and high cost. Thus, it is urgent to develop next-generation battery technologies with low cost and high safety. Sodium-ion battery is considered as a promising candidate due to the abundant sodium resources and low cost. Its practical application, however, is hindered by the absence of the advanced electrode materials. The tin-based anodes deliver high theoretical capacities and show great promise for the sodium-ion batteries, but the large volume expansion upon cycling can damage the structure and lead to short cycling life. In this dissertation, three tin-base anodes have been developed. First, a free-standing Sn CFC electrode was synthesized via the electrospinning method. The carbon fiber and Sn nanoparticles together provide fast ions and electrons pathway, enabling a dominant pseudocapacitance contribution. Moreover, the facile manufacturing technique yields the Sn CFC electrode with a high mass loading. Second, a novel anode was designed with a pomegranate-like structure that the SnP2O7 nanoparticles dispersed in the robust N-doped carbon matrix. The carbon matrix forms strong interaction with the SnP2O7 nanoparticles, leading to a stable structure without any particle aggregation. Third, a SnS/Sb2S3 heterostructure was prepared and encapsulated in the sulfur and nitrogen co-doped carbon matrix with engineered porous structure. The porous structure can provide void space to alleviate the volume expansion upon cycling, guaranteeing excellent structural stability. The unique heterostructure and the S, N co-doped carbon matrix together facilitate fast-charge transport to improve reaction kinetics. Aqueous zinc-ion batteries show great promise in large-scale energy storage. However, the decomposition of water molecules leads to severe side reactions, resulting in the limited lifespan of the zinc-ion batteries. Here, the tetrahydrofuran additive was introduced into the zinc sulfate electrolyte to reduce the water activity by modulating the solvation structure of the Zn hydration layer. Thus, in an optimal 2 M ZnSO4/THF (5% by volume) electrolyte, the hydrogen evolution reaction and byproduct precipitation can be suppressed, which greatly improves the cycling stability and Coulombic efficiency.
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