Performance of lithium-ion cells with a γ-ray radiated electrolyte
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Lithium-ion cells are potential energy storage devices in planetary exploration due to their high energy density and long lifespan. The high intensity of γ-ray radiation in outer space poses a great challenge to lithium-ion cells. In this study, radioactive Co-60 was applied as the radiation source to investigate the performance of lithium-ion cells with the electrolyte radiated by γ-rays. Two kinds of cathode (LiMn2O4, LiNi0.8Co0.15Al0.05O2) and three kinds of anode (Li, graphite, Li4Ti5O12) were examined. There are two new mechanisms in the cells with a radiated electrolyte which affect the cell voltage and cycling performance: (i) erosion of the lithium electrode in the radiated electrolyte in the cases of half cells and lithium symmetrical cells; and (ii) electrochemical reaction between carboxyl species and the lithium extracted from the cathode in the case of full cells.
KeywordsRadiation Lithium-ion battery Aerospace Electrolyte Electrochemical performance
This study was supported by the National Science Foundation of China (grant no. 50372064 and 20471057). The USTC radiation chemistry laboratory provided assistance for the experiments involving γ-ray radiation. We are also grateful to Dr. Andrew Jansen from Argonne National Laboratory for his help in language editing.
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