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The promising energy storage properties of new lead-free antiferroelectric HfxZr1-xO2 (x = 0.1–0.4) films with high energy storage density are reported. The energy storage density of the Hf0.3Zr0.7O2 capacitor does not decrease with the increase in temperature up to 175 °C, and it decreases by only ≈4.5% after field cycling 109 times.
Park et al. (2014) studied this question.