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康寶智信測量技術（北京）有限公司
主營產品： 水分吸附分析儀,水分吸附等溫線,蒸汽吸附分析儀 |
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康寶智信測量技術（北京）有限公司
主營產品： 水分吸附分析儀,水分吸附等溫線,蒸汽吸附分析儀 |
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2023-4-16 閱讀(1023)
關于水分活度在改善鋁空氣電池性能方面的新應用的有趣文章。這些電池比鋰離子電池效率高得多，但由于鋁陽極的腐蝕，尚未被采用。用甘油降低水分活度可以抑制這個問題。
https://www.sciencedirect dot com/science/article/abs/pii/S2405829722006699?via=ihub
Thi Huong Pham
In this work, glycerol is introduced as a low-cost and eco-friendly electrolyte additive for primary aluminum-air (Al-air) battery. Glycerol molecules form hydrogen bonds (H-bonds) with water (H2O) molecules to reconstruct hydrogen bond network in the electrolyte, leading to a reduction in the H2O activity. Accordingly, the hydrogen evolution potential of electrolyte is expanded, the hydrogen evolution reaction (HER) and self-corrosion of Al anodes are suppressed. As a result, the capacity density, and energy density of Al-air battery are increased significantly in the presence of glycerol. With the glycerol content of 20% in 4 M NaOH electrolyte, the capacity density of Al-air battery exhibits a value of 2564 mAh g ? 1, which is 2.3 times higher than in 4 M NaOH electrolyte.
