Designing and understanding high-energy fast-charging lithium batteries
Abstract/Contents
- Abstract
- Secondary battery systems based on lithium (Li)-ion chemistries have achieved great success with their broad applications in portable electronics, electric vehicles and grid storage during the past few decades. However, current Li-ion battery technology requires urgent improvements in two key aspects: fast charging capability and energy density. Fast charging of electric vehicles could significantly improve the recharging experience, but it is currently impossible to fully charge within 10 minutes without undermining cycle life. Further improvement in energy density could enhance vehicle range, but it calls for transition in chemistry to, for example, Li metal batteries that show intrinsically fast capacity decay. Therefore, researches have been focusing on understanding the failure mechanism during Li-ion battery fast charging, as well as pro-long the cycle life of higher energy Li metal battery systems. In Chapter 1, background will be introduced about the current status of efforts to high specific energy, fast charging Li batteries. In Chapter 2, the temperature dependence of equilibrium potential is revealed to impact the Li plating pattern on graphite anodes, directing potential designs to enable the extreme fast charging of Li-ion batteries. In chapters 3 and 4, designs of artificial "host" frameworks are introduced to stabilize the volume of Li metal anodes during cycling, improving the cycle life. In chapter 5 to 7, molecular designs of novel solvent molecules are discussed to enable highly stable liquid electrolytes with practical Li metal battery cycling performances. The design principles and working mechanisms of these new electrolytes will also be elaborated. Finally, future directions of EV battery developments will be outlooked.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2021; ©2021 |
| Publication date | 2021; 2021 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Wang, Hansen |
|---|---|
| Degree supervisor | Cui, Yi, 1976- |
| Thesis advisor | Cui, Yi, 1976- |
| Thesis advisor | Bao, Zhenan |
| Thesis advisor | Chueh, William |
| Degree committee member | Bao, Zhenan |
| Degree committee member | Chueh, William |
| Associated with | Stanford University, Department of Materials Science and Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Hansen Wang. |
|---|---|
| Note | Submitted to the Department of Materials Science and Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2021. |
| Location | https://purl.stanford.edu/zk368fq4853 |
Access conditions
- Copyright
- © 2021 by Hansen Wang
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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