| Autor: |
Daniel A. Steingart, Gj La O, Robert Mohr |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
ECS Meeting Abstracts. :727-727 |
| ISSN: |
2151-2043 |
| DOI: |
10.1149/ma2020-024727mtgabs |
| Popis: |
The modern lithium ion battery has been engineered to impressive standards, with coulomibic efficiency approaching 99.999% and a safety record for well manufactured cells of less that on incident in 10,000,000 cell given the correct environmental and cycling standards. But the ion-shuttle mechanism within the the battery sets up the relationship Cremaining = Cinitial ηc cycles Over the past few years we have redesigned a zinc bromine battery that decouples this relationship almost completely, with the goal of Cremaining ≠ Cinitial ηc cycles In this approach we purposefully trade entropy management for cycle life, but it is not without its cost and challenges. In this presentation I will review the progress and challenges of a battery that does not fail critically under internal short circuit conditions, and discuss pathways and pitfalls we have discovered along the way. We will discuss: The extent to which side reactions can be "self-cancelling" The associated impact of heat generated by "guided" side reaction The scaling behavior and functional and spatial heterogeneity encountered when one allows significant latitude in the reaction space within a cell. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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