2021
DOI: 10.1002/adfm.202110478
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Outstanding Energy Storage Performance in High‐Hardness (Bi0.5K0.5)TiO3‐Based Lead‐Free Relaxors via Multi‐Scale Synergistic Design

Abstract: Lead‐free dielectric ceramics with ultrahigh energy storage performance are the best potential stocks used in next‐generation advanced pulse power capacitors. Here, an ultrahigh recoverable energy storage density Wrec of ≈7.57 J cm−3 and a large efficiency η of ≈81.4% are first realized in (Bi0.5K0.5)TiO3 (BKT)‐based relaxor ferroelectric ceramics with an ultrahigh Vickers hardness Hv ≈ 8.63 Gpa by adding BaTiO3 and NaNbO3 in order to synergistically design the domain and microstructure in multiscale, leading … Show more

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Cited by 120 publications
(110 citation statements)
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“…Mechanical properties such as hardness play an important role in practical applications and directly affect the service life and scope of use of energy storage materials 36 , 37 . Figure 5a and Supplementary Fig.…”
Section: Resultsmentioning
confidence: 99%
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“…Mechanical properties such as hardness play an important role in practical applications and directly affect the service life and scope of use of energy storage materials 36 , 37 . Figure 5a and Supplementary Fig.…”
Section: Resultsmentioning
confidence: 99%
“…Excellent temperature/frequency/cycling stability of the energy storage performance would give the capacitors an enormous application range 37 . As displayed in Fig.…”
Section: Resultsmentioning
confidence: 99%
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“…Notably, charge–discharge properties are very important to evaluate the actual application in the pulsed power systems of dielectric capacitors. Generally, the overdamped discharge energy density (Wd${W_d}$) can be achieved as 25 Wdbadbreak=it2RV\begin{equation}{W_d} = \frac{{\smallint i{{\left( t \right)}^2}R}}{V}\end{equation}…”
Section: Resultsmentioning
confidence: 99%