The discharge performance of Li2MoO4/LiNO3-KNO3/Li-Mg-B alloy cell as a novel high-temperature lithium battery system
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High-temperature battery system operated at or below 300 °C is highly desired for geothermal borehole applications. However, it remains a challenge to find suitable electrode materials meeting the need of wide borehole temperature. In this study, the discharge performance of Li2MoO4/LiNO3-KNO3/Li-Mg-B alloy battery system was studied over the temperature range of 150~300 °C with different current densities ranging from 10 to 30 mA cm−2. The electrochemical test result showed that the single cell delivered maximum discharge capacity at 250 °C, with value of 1178.6 mAh g−1 at a current density of 10 mA cm−2. Besides, it is found that the discharge capacities of the single cell increased as the current density rose at 300 °C attributed to the enhanced ionic conductivity at high temperature. As a result, the Li2MoO4/LiNO3-KNO3/Li-Mg-B alloy system is capable of being used in instrumentation for geothermal and oil/gas borehole explore between 200 and 250 °C.
KeywordsLi2MoO4 High-temperature lithium batteries Borehole applications LiNO3-KNO3 eutectic
This work is supported by the National Nature Science Foundation of China (No. 21473234).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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