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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Excellent energy storage properties and superior stability achieved in lead-free ceramics via a spatial sandwich structure design strategy
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Excellent energy storage properties and superior stability achieved in lead-free ceramics via a spatial sandwich structure design strategy

机译：通过空间夹层结构设计策略，在无铅陶瓷中实现了优异的储能性能和卓越的稳定性

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摘要

Lead-free ceramics play a vital role in the context of sustainable development for energy storage applications due to their high power density, excellent high temperature resistance and nontoxicity. Nevertheless, the low energy density and small energy conversion efficiency of lead-free ceramics caused by the contradictory relation of polarization and electric breakdown strength restrict the urgent need for electronic components towards miniaturization and achieving light weight. Herein, to overcome this challenge and optimize the energy storage properties of lead-free ceramics, unlike the traditional approaches of oxide doping, adopting new sintering techniques and optimizing the composition, samples with a spatial sandwich structure were constructed and prepared by the tape casting technique. Obviously, the opposite relationship between the polarization and the electric breakdown strength can be resolved very well via this design strategy. The recoverable energy storage density reaches 6.3 J cm(-3) together with high energy conversion efficiency (93.61%) and high applied electric field (540 kV cm(-1)). An ultrahigh power density of 215 MW cm(-3) and a fast discharge time of 140 ns can also be realized. In addition, the energy conversion efficiency is higher than 90% and the variation of recoverable energy storage density is less than +/- 2% within 1-100 Hz and 1-10(5) fatigue cycles. Meanwhile, the change of recoverable energy storage density is also less than +/- 6.5% from 30 degrees C to 160 degrees C. The above results indicate that the current study helps to promote the development of eco-friendly ceramics for high energy storage applications.
机译：无铅陶瓷由于其高功率密度、优良的耐高温性和无毒性，在可持续发展的储能应用中发挥着重要作用。然而，由于极化和击穿强度之间的矛盾关系，导致无铅陶瓷的能量密度低，能量转换效率低，限制了电子元件向小型化、轻量化方向发展的迫切需求。在此，为了克服这一挑战并优化无铅陶瓷的储能性能，与传统的氧化物掺杂方法不同，采用新的烧结技术并优化成分，通过流延技术构建并制备了具有空间三明治结构的样品。显然，通过这种设计策略可以很好地解决极化和击穿强度之间的相反关系。可回收储能密度达到6.3jcm（-3），能量转换效率高（93.61%），外加电场高（540kv-cm（-1））。还可以实现215mW cm（-3）的超高功率密度和140ns的快速放电时间。此外，在1-100Hz和1-10（5）个疲劳周期内，能量转换效率高于90%，可回收能量存储密度的变化小于+/-2%。同时，从30摄氏度到160摄氏度，可回收储能密度的变化也小于+/-6.5%。上述结果表明，当前的研究有助于促进高储能应用的环保陶瓷的发展。

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    Yan Fei; He Xia; Bai Hairui; Shen Bo; Zhai Jiwei;

  • 作者单位

    Tongji Univ Sch Mat Sci &

    Engn Shanghai Key Lab R&

    D &

    Applict Metall Funct Mat Funct Mat Res Lab Shanghai 201804 Peoples R China;

    Tongji Univ Sch Mat Sci &

    Engn Shanghai Key Lab R&

    D &

    Applict Metall Funct Mat Funct Mat Res Lab Shanghai 201804 Peoples R China;

    Tongji Univ Sch Mat Sci &

    Engn Shanghai Key Lab R&

    D &

    Applict Metall Funct Mat Funct Mat Res Lab Shanghai 201804 Peoples R China;

    Tongji Univ Sch Mat Sci &

    Engn Shanghai Key Lab R&

    D &

    Applict Metall Funct Mat Funct Mat Res Lab Shanghai 201804 Peoples R China;

    Tongji Univ Sch Mat Sci &

    Engn Shanghai Key Lab R&

    D &

    Applict Metall Funct Mat Funct Mat Res Lab Shanghai 201804 Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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