Low frequency noise of electrochemical power sources
| Autor: | Vlasta Sedlakova, Tomas Kuparowitz, Josef Sikula, Petr Sedlak |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry 020209 energy Noise spectral density Infrasound Electrical engineering Spectral density 02 engineering and technology Noise (electronics) Power (physics) Computational physics Generation–recombination noise 0202 electrical engineering electronic engineering information engineering Rectangular potential barrier Flicker noise business |
| Zdroj: | 2017 International Conference on Noise and Fluctuations (ICNF) |
| DOI: | 10.1109/icnf.2017.7985993 |
| Popis: | Terminal voltage fluctuation of lithium-sulfur cells and nickel-metal-hydride cells was measured in different time intervals since cell charging to full capacity. The power noise spectral density is of 1/fα type with exponent a varying in the range from 1 to 1.8. The main noise sources in charge storage systems are: i) fluctuation of potential barrier on the electrode-electrolyte interface (its height and width); ii) generation-recombination processes due to the chemical redox reactions, happening in the cell during its discharge. The state of health of each cell influences the noise spectral density shape and the rate of its decline. Further study of described behaviors may lead to development of reliable method for cell quality assessment. |
| Databáze: | OpenAIRE |
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