## 1 Introduction  
Materials possessing the ability to perform multifunctional properties to be utilized in various advanced technological applications simultaneously have always remained of interest to researchers and scientists. The rapid growth in the demand of fossil fuels for energy purposes has compelled societies to shift towards alternative energy sources. Dielectric ceramic capacitors have gained considerable attention and are environmentally friendly. However, it is still challenging to achieve high recoverable energy density (\(W_{mc}\)) and effective energy conversion efficiency (\(\eta\)) simultaneously in dielectric materials, which has restricted the possible high level use of dielectric ceramics in energy storing applications [1, 2, 3]. Bi\({}_{0.5}\)Na\({}_{0.5}\)TiO\({}_{3}\) (BNT) is a perovskite ferroelectric material with a remnant polarization (\(P_{r}\)) of \(\sim\)40 \(\mu\)C/cm\({}^{2}\) and Curie temperature of \(\sim\)310 \({}^{\circ}\)C [4]. BNT in combination with other materials has shown strong abilities for energy storage applications. [PERSON] et al. reported the fabrication of a Bi\({}_{0.5}\)Na\({}_{0.5}\)TiO\({}_{3}\)-SrTiO\({}_{3}\) (BNT-ST) ceramic system, which established a ferroelectric/relaxor phase transition and delivered a high \(W_{rec}\) of 0.65 J/cm\({}^{3}\) at 65 kV/cm [5]. Moreover, [PERSON] et al. reported the fabrication of an A and B-sites doped ((Bi\({}_{0.5}\)Na\({}_{0.5}\))\({}_{0.93}\)Ba\({}_{0.07}\))\({}_{1-x}\)La\({}_{x}\) Ti\({}_{1-y}\)Zr\({}_{y}\)O\({}_{3}\) ceramic system with an energy storage density (\(W_{ST}\)) of 1.21 J/cm\({}^{3}\) [6]. Similarly, Bi\({}_{0.5}\)K\({}_{0.5}\)TiO\({}_{3}\) (BKT) is another perovskite ferroelectric material with dielectric relaxor behavior [7]. [PERSON] et al., reported the synthesis of a 0.94(0.75 Bi\({}_{0.5}\)Na\({}_{0.5}\)TiO\({}_{3}\)-0.25 Bi\({}_{0.5}\)K\({}_{0.5}\)TiO\({}_{3}\))-0.06 BiAlO\({}_{3}\) ceramic system with an \(\eta\) of 73.2% [8]. However, discovering materials showing high \(W_{rec}\) and \(\eta\) simultaneously is challenging. Having explored advanced materials for the best merits, the concept of high-entropy ceramics was introduced by [PERSON] et al., [9]. In their approach, five or more suitable oxide cations (either equimolar or near-equimolar ratios) at single lattice site were accommodated [10]. For this strategy the free energy from the fabricated materials was achieved by entropic contributions from cohesive energy, which also stimulated the thermodynamic stability of the material [11]. Perovskite (ABO\({}_{3}\)) structures are considered suitable for adapting these strategies as they possess tolerance factors within the range of 0.77 \(<\) t \(<\) 1.10, which can be disturbed by the radii of ions; hence, the lattice sites of the structure can easily be occupied by the ions of even variant valance states and ionic radii [12]. After replacing the ions at A or B-sites of ABO\({}_{3}\), lattice distortion or defect production is expected that can disturb the perovskite structure and result in unique properties of the material [13]. [PERSON] et al., reported the fabrication of a Ba(Ti\({}_{1/6}\)Sn\({}_{1/6}\)Zr\({}_{1/6}\)Hf\({}_{1/6}\)Nb\({}_{1/6}\)Ga\({}_{1/6}\))O\({}_{3}\) ceramic system with a relative density of 92.7% [14]. [PERSON] et al. studied a high entropy (Na\({}_{0.2}\)Bi\({}_{0.2}\)Ba\({}_{0.2}\)Sr\({}_{0.2}\)Ca\({}_{0.2}\))TiO\({}_{3}\) ceramic with a discharge energy density of 1.02 J/cm\({}^{3}\) [15]. Similarly, [PERSON] et al., successfully fabricated (Bi\({}_{0.2}\)Na\({}_{0.2}\)K\({}_{0.2}\)Ba\({}_{0.2}\)Ca\({}_{0.2}\))TiO\({}_{3}\) with a tolerance factor \(t\) = 1.01, and a \(W_{ST}\) of 0.684 J/cm\({}^{3}\) [16]. Our study focused fabrication of new high-entropy configured ceramic materials.