Journal of Inorganic Materials >
Linear-like NaNbO3-based Lead-free Relaxor Antiferroelectric Ceramics with Excellent Energy-storage and Charge-discharge Properties
Received date: 2023-10-20
Revised date: 2023-12-10
Online published: 2024-04-25
Supported by
National Key R&D Program of China(2022YFB3807403)
Innovation Team Project in Universities and Colleges(2022AH010058)
National Natural Science Foundation of China(52302131)
Natural Science Foundation of Anhui Province(2308085QE140)
Antiferroelectric (AFE) materials exhibit great potential in the application of high-performance dielectric energy storage capacitors due to their electric field-induced AFE-ferroelectric (FE) phase transition. However, the large hysteresis of field-induced phase transition makes it difficult to simultaneously achieve high energy-storage density (Wrec) and efficiency (η) for AFEs. This work improved the energy-storage performance of NaNbO3-based lead-free AFE ceramics by introducing the third group Bi(Mg0.5Ti0.5)O3 into 0.76NaNbO3-0.24(Bi0.5Na0.5) TiO3 to regulate its relaxation characteristics. Novel lead-free AFE ceramics, (0.76-x)NaNbO3-0.24(Bi0.5Na0.5)TiO3-xBi(Mg0.5Ti0.5)O3, were prepared by a traditional solid-state reaction method. Their phase structure and microstructure as well as dielectric, energy-storage, and charge-discharge characteristics were studied. The results indicated that introduction of Bi(Mg0.5Ti0.5)O3 obviously enhanced the dielectric relaxor behavior of the matrix without changing its AFE R-phase structure, which led to the significantly reduced polarization hysteresis. Especially, a linear-like polarization-field hysteresis loop with extremely-low hysteresis was obtained in the composition of x=0.050. At the same time, microstructure of the ceramic was effectively optimized, its dielectric constant decreased, and its breakdown strength had significant enhanced. As a result, a high Wrec=3.5 J/cm3 and a high η=93% were simultaneously achieved under a moderate electric field of 30 kV/mm in the x=0.050 ceramic. Moreover, the x=0.050 ceramic also exhibited excellent charge-discharge characteristics with a high-power density PD=131(1±1%) MW/cm3, a high discharge energy density WD=1.66(1±6%) J/cm3 and a fast discharge rate t0.9<290 ns at 20 kV/mm. The charge-discharge properties maintained good stability within a wide temperature range of 25-125 ℃. These results indicate that 0.71NaNbO3-0.24(Bi0.5Na0.5)TiO3-0.050Bi(Mg0.5Ti0.5)O3 ceramics can be expected to be applied in high-power energy-storage capacitors.
Ruijian SHI , Junwei LEI , Yi ZHANG , Aiwen XIE , Ruzhong ZUO . Linear-like NaNbO3-based Lead-free Relaxor Antiferroelectric Ceramics with Excellent Energy-storage and Charge-discharge Properties[J]. Journal of Inorganic Materials, 2024 , 39(4) : 423 -431 . DOI: 10.15541/jim20230486
图1 不同组分(0.76-x)NN-0.24BNT-xBMT陶瓷的室温 XRD图谱Fig. 1 XRD patterns of (0.76-x)NN-0.24BNT-xBMT ceramics with different composition at room temperature |
图2 不同组分(0.76-x)NN-0.24BNT-xBMT陶瓷的全谱XRD结构精修Fig. 2 Rietveld refinement results of XRD patterns for (0.76-x)NN-0.24BNT-xBMT ceramics with different compositions (a) x=0; (b) x=0.025; (c) x=0.050; (d) x=0.075 |
表1 全谱拟合的(0.76-x)NN-0.24BNT-xBMT陶瓷精修结果参数Table 1 Refined structural parameters of full spectrum fitting for (0.76-x)NN-0.24BNT-xBMT ceramics |
x | Space group | Lattice parameters | V/nm3 | Rwp/% | Rp/% | χ2 |
---|---|---|---|---|---|---|
0 | Pnma | a=0.77920 nm, b=0.77852 nm, c=2.33854 nm, α=β=γ=90o | 1.418608 | 5.35 | 3.70 | 3.62 |
0.025 | Pnma | a=0.77965 nm, b=0.77897 nm, c=2.34045 nm, α=β=γ=90o | 1.421413 | 5.20 | 3.62 | 3.59 |
0.050 | Pnma | a=0.77899 nm, b=0.77995 nm, c=2.33913 nm, α=β=γ=90o | 1.421193 | 6.27 | 4.05 | 4.17 |
0.075 | Pnma | a=0.78060 nm, b=0.78000 nm, c=2.34481 nm, α=β=γ=90o | 1.427666 | 4.99 | 3.56 | 2.96 |
图7 (0.76-x)NN-0.24BNT-xBMT陶瓷的储能性能Fig. 7 Energy-storage properties of (0.76-x)NN-0.24BNT-xBMT ceramics (a, b) P-E hysteresis loops (a) and energy-storage performance (b) of different compositions measured at 20 kV/mm; (c, d) P-E hysteresis loops (c) and energy-storage performance (d) of the x=0.050 ceramic measured under different electric fields |
图8 (0.76-x)NN-0.24BNT-xBMT(x=0.050)陶瓷的变电场充放电特性Fig. 8 Electric field-dependent charge-discharge characteristics of (0.76-x)NN-0.24BNT-xBMT (x=0.050) ceramics (a, b) Overdamped discharging current curves (a) and WD versus time curves (b) of the x=0.050 ceramic under different electric fields; (c, d) Underdamped discharging curves (c) and variation of PD, WD, and t0.9 (d) of the x=0.050 ceramics |
图9 (0.76-x)NN-0.24BNT-xBMT(x=0.050)陶瓷的变温充放电特性Fig. 9 Temperature-dependent charge-discharge characteristics of (0.76-x)NN-0.24BNT-xBMT (x=0.050) ceramics (a, b) Overdamped discharging current curves (a) and WD versus time curves (b) of the x=0.050 ceramic under different electric fields; (c, d) Underdamped discharging curves (c) and variation of PD, WD, and t0.9 (d) of the x=0.050 ceramics |
[1] |
|
[2] |
|
[3] |
|
[4] |
|
[5] |
|
[6] |
|
[7] |
|
[8] |
|
[9] |
|
[10] |
|
[11] |
|
[12] |
|
[13] |
|
[14] |
|
[15] |
|
[16] |
|
[17] |
|
[18] |
|
[19] |
|
[20] |
|
[21] |
|
[22] |
|
[23] |
|
[24] |
|
/
〈 |
|
〉 |