School of Microelectronics , Xi'an Jiaotong University , Xi'an 710049 , China.
State Key Laboratory for Mechanical Behavior of Materials and School of Materials Science and Engineering , Xi'an Jiaotong University , Xi'an 710049 , China.
ACS Appl Mater Interfaces. 2019 Feb 6;11(5):5247-5255. doi: 10.1021/acsami.8b18429. Epub 2019 Jan 29.
As passive components in flexible electronics, the dielectric capacitors for energy storage are facing the challenges of flexibility and capability for integration and miniaturization. In this work, the all-inorganic flexible dielectric film capacitors have been obtained. The flexible capacitors show a desirable recoverable energy density ( W) of 40.6 J/cm and a good energy efficiency (η) of 68.9%. Moreover, they have no obvious deterioration on both the W and η after 10 times of mechanical bending cycles or under the bending state with a curvature radius of 4 mm. Besides, the outstanding stability of the capacitors against cycle fatigue over fast 10 charge-discharge cycles is demonstrated. Most importantly, they work properly at a wide temperature range from -120 to 150 °C with W > 15 J/cm and η > 70%. These fascinating performances endow the flexible capacitors with huge potential application in the future "microenergy storage" system in flexible electronics.
作为柔性电子产品中的无源元件，用于能量存储的介电电容器面临着灵活性以及集成和小型化能力的挑战。在这项工作中，获得了全无机柔性介电薄膜电容器。柔性电容器表现出令人满意的可恢复能量密度 (W) 为 40.6 J/cm 和良好的能量效率 (η) 为 68.9%。此外，在 10 次机械弯曲循环或在曲率半径为 4mm 的弯曲状态下，它们的 W 和 η 均没有明显恶化。此外，还证明了电容器在快速 10 次充放电循环的循环疲劳方面具有出色的稳定性。最重要的是，它们在从-120°C 到 150°C 的宽温度范围内工作正常，W > 15 J/cm 和 η > 70%。这些迷人的性能使柔性电容器在未来的柔性电子产品“微储能”系统中具有巨大的潜在应用。
