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Influence of temperature on lithium-oxygen battery behavior
Jin-Bum Park1, Jusef Hassoun, Hun-Gi Jung
1Department of Energy Engineering, Hanyang University, Seoul 133-791, South Korea.
Nano Letters
|May 18, 2013
Summary
Temperature significantly impacts lithium-oxygen cell performance. Low temperatures hinder lithium-ion diffusion, while high temperatures enhance reaction rates by reducing electrolyte viscosity and improving oxygen mobility.
Area of Science:
- Electrochemistry
- Materials Science
Background:
- Lithium-oxygen (Li-O2) cells are promising for high energy density storage.
- Understanding the influence of operating temperature on Li-O2 cell performance is crucial for practical applications.
Purpose of the Study:
- To investigate the electrochemical and morphological response of lithium-oxygen cells cycled across a wide temperature range (-10 to 70 °C).
- To elucidate the impact of temperature on key reaction kinetics and product formation.
Main Methods:
- Electrochemical cycling of lithium-oxygen cells at various temperatures.
- Morphological analysis of discharge products.
Main Results:
- Electrochemical performance is strongly temperature-dependent.
- Low temperatures (-10 °C) decrease cell rate due to reduced lithium-ion diffusion.
- High temperatures (70 °C) enhance cell rate via decreased electrolyte viscosity and increased oxygen mobility.
- Temperature influences the crystallinity of the lithium peroxide discharge product.
Conclusions:
- Temperature is a critical factor governing lithium-oxygen cell efficiency and longevity.
- Optimizing operating temperature can mitigate performance limitations related to ion diffusion and electrolyte properties.
- Further research into temperature-dependent discharge product morphology is warranted.
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