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Improvement of the reliability of potassium-ion electrets thorough an additional oxidation process
Ist Teil von
Applied physics letters, 2022-12, Vol.121 (24)
Ort / Verlag
Melville: American Institute of Physics
Erscheinungsjahr
2022
Link zum Volltext
Quelle
美国小型学会期刊集（AIP Scitation平台）
Beschreibungen/Notizen
Potassium-ion electrets, which mainly consist of amorphous silica and permanently store negative charge, are vital elements of small autonomous vibration-powered generators. However, negative charge decay is sometimes observed to cause issues for applications. In this study, we propose an improved guideline for the fabrication of potassium-ion electrets by first-principles calculations based on density functional theory, which shows that yield reduction can be suppressed by additional oxidation. Moreover, we experimentally confirm that the additional oxidation step effectively extends the lifetime of potassium-ion electrets.