Targeted doping builds a high energy density composite piezoceramics for energy harvesting
Targeted doping builds a high energy density composite piezoceramics for energy harvesting
复制标题
定向掺杂构建用于能量收集的高能量密度复合压电陶瓷
DOI：
10.1111/jace.15896
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发表时间：
2018-07
影响因子：
3.9
通讯作者：
Zhu Mankang
中科院分区：
文献类型：
--
作者：
Yu Xiaole;Hou Yudong;Zheng Mupeng;Yan Jing;Jia Wenxu;Zhu Mankang
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(Zn1/3Nb2/3)O3‐0.8Pb(Zr0.5Ti0.5)O3(PZN‐PZT) as an example, dual functions can be achieved by introducing appropriate amount of target‐doped (Zn0.1Ni0.9)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 ind33×g33due 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 × 10−15m2/N) of thed33×g33. The cantilever piezoelectric energy harvester fabricated with this material generates up to 4.50 μW/mm3of power density at 1gacceleration, 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.
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