To build piezoceramics with high transduction coefficient (d₃₃ × g₃₃) is the key to improve the power generation capability of piezoelectric energy harvester. Here, a new targeted doping strategy has been proposed to significantly increase the energy density of piezoceramics. Taking the modification of 0.2Pb(Zn_1/3Nb_2/3)O₃‐0.8Pb(Zr_0.5Ti_0.5)O₃ (PZN‐PZT) as an example, dual functions can be achieved by introducing appropriate amount of target‐doped (Zn_0.1Ni_0.9)TiO₃ (ZTN9) based on its pyrolysis characteristics. On the one hand, Ni²⁺ ions enter the perovskite matrix to replace Zn²⁺ ions to form equivalent doping; on the other hand, it induces the formation of 0‐3 ZnO/perovskite composite structure, and both of which promote the large increase in d₃₃ × g₃₃ due to the changes in the domain configuration are more conducive to the ferro‐/piezoelectricity. In all compositions, 0.67 mol% ZTN9 added specimen has a maximum value (12 433 × 10⁻¹⁵ m²/N) of the d₃₃ × g₃₃. The cantilever piezoelectric energy harvester fabricated with this material generates up to 4.50 μW/mm³ of power density at 1 g acceleration, which is capable of quickly charging a 47 μF electrolytic capacitor and then lit 135 parallel‐connected commercial blue light‐emitting diodes (LEDs), showing its important application in implementing self‐powered microsensors.

中文翻译：

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定向掺杂可构建用于能量收集的高能量密度复合压电陶瓷

构建具有高传导系数（d ₃₃ × g ₃₃）的压电陶瓷是提高压电能量采集器发电能力的关键。在这里，已经提出了一种新的有针对性的掺杂策略，以显着提高压电陶瓷的能量密度。以0.2Pb（Zn _1/3 Nb _2/3）O ₃ -0.8Pb（Zr _0.5 Ti _0.5）O ₃（PZN-PZT）的改性为例，通过引入适量的靶标可以实现双重功能- Zn（Ni _0.1 Ni _0.9）TiO ₃（ZTN9）的热解特性对其进行了掺杂。一方面，倪²⁺离子进入钙钛矿基质中，以取代Zn ²⁺离子，形成等效掺杂。另一方面，它诱导了0-3 ZnO /钙钛矿复合结构的形成，并且两者都促进了d ₃₃ × g ₃₃的大增加，这是由于畴结构的变化更有利于铁电/压电。在所有组成中，添加的0.67 mol％ZTN9样品的d ₃₃ × g ₃₃的最大值（12 433×10 ^-15 m ² / N）。用这种材料制成的悬臂式压电能量采集器在1时可产生高达4.50μW/ mm ³的功率密度g加速度可以快速为47μF的电解电容器充电，然后点亮135个并联的商用蓝色发光二极管（LED），显示出其在实现自供电微传感器中的重要应用。