法拉第效率
氧化还原
锂(药物)
自行车
电池(电)
工作(物理)
化学
电极
电流(流体)
还原(数学)
锂离子电池
材料科学
计算机科学
电化学
无机化学
热力学
物理
数学
物理化学
功率(物理)
心理学
考古
几何学
精神科
历史
作者
Adam Tornheim,Daniel C. O’Hanlon
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2020-07-09
卷期号:167 (11): 110520-110520
被引量:35
标识
DOI:10.1149/1945-7111/ab9ee8
摘要
In this work, the battery performance metrics of Coulombic efficiency (CE) and capacity retention (CR) are derived in terms of cycling current and side-reaction currents at each electrode. A cyclable lithium inventory (CLI) framework is developed to explain the fundamental differences between inventory-limited and site-limited cells. The otherwise unmeasurable oxidation and reduction side-reaction currents are expressed in terms of cycling current, CE, and CR for both limitation types. Important conclusions regarding cyclable lithium inventory, limitation type, and the interpretation of CE and CR are discussed. From the framework, CE depends on either the oxidation side-reaction current or the reduction side-reaction current, but not both. CE and CR depend on cell limitation type and are increased by faster cycling. Experiments are presented to support the framework and demonstrate that cells can transition between limitation types. These conclusions are presented in terms of lithium-ion batteries, but this framework may be extended to describe other battery systems.
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