| 269 | 0 | 231 |
| 下载次数 | 被引频次 | 阅读次数 |
不同维度的无机填料对聚合物基电介质的储能性能有着极大的影响。根据多维协同的理念，将不同维度的氮化硼纳米片(BNNS)和一维二氧化钛纳米纤维(1DTi O2)引入到聚酰亚胺(PI)中，利用流延法制备了(BNNS-TiO2-BNNS)/PI复合膜(BTB/PI复合膜)。结果表明：BTB/PI复合膜在103～106 Hz和25～200℃的范围内介电常数保持稳定，介电损耗小于0.025。最佳填料比的BTB/PI复合膜在200℃下具备3.04 J/cm3、88%的高储能性能。本工作提出的聚合物基复合膜，为高温聚合物的研究制备提供了一条行之有效的策略。
Abstract：Introduction Polymer dielectrics play a crucial role in contemporary electronics because of their flexibility,low cost,high operating voltage,corrosion resistance,self-healing,etc.,which are widely used in oil and gas exploration,and electric vehicles at operating temperatures (>105℃).However,polymers necessitate the maintenance of a substantial volume during usage due to their low dielectric constant,thereby resulting in a diminished energy storage density.Furthermore,polymers demonstrate a relatively low thermal conductivity,and are susceptible to failure when exposed to high-temperature conditions.To function effectively in high-temperature conditions exceeding 105℃,an extra refrigeration system must be incorporated into an electronic power system.This undoubtedly results in an increase in both energy consumption and overall weight of the system.Consequently,developing a new generation of polymer-based film capacitors with superior high-temperature energy storage capabilities becomes a necessity.In this paper,we utilized a multidimensional synergistic concept to comprehensively improve the high-temperature energy storage performance of PI-based polymer dielectrics via combining the electrical and thermal advantages of inorganic materials and polyimide (PI) in different dimensions.Methods (BNNS-Ti O2-BNNS)/PI sandwich-structured composite films (denoted as BTB/PI film) were prepared by a casting method based on a concept of multidimensional synergy.Titanium dioxide (TiO2) with a high dielectric constant was prepared into a one-dimensional nanofiber structure by an electrostatic spinning method with PI as an interlayer of BTB/PI film.Electrically insulating and thermally conductive boron nitride was prepared into a two-dimensional nanosheet structure by a liquid phase exfoliation method with PI as an insulating and thermally conductive outer layer of the BTB/PI film.The frequency-/temperaturedependence of the films were examined by a model LRS-003 high and low temperature cooling and heating system and a model E4980 precision LCR meter.The PE loops for the films were determined by a linked test rig consisting of a model ZJ-6A quasi-static d33 tester,a model MODEL 610C Trek HV amplifier and a model BWT-001 variable temperature test rig at 25℃and 200℃,respectively.Results and discussion The (BNNS-TiO2-BNNS)/PI sandwich composite films with the thicknesses of 22–25μm prepared are dense and uniform,without obvious holes and obvious delamination,having superior dielectric properties,breakdown strength and high-temperature energy storage properties.The results by frequency-/temperature-dependent tests indicate that the dielectric constant of BTB/PI films increases with the increase of BNNS content.Compared with the dielectric constant of pure PI film at 1kHz (i.e.,3.12),BTB/PI-3,BTB/PI-5,2BTB/PI-7 and BTB/PI-10 improve to 4.20,4.37,4.67 and 4.92,respectively.The dielectric loss of the composite film at 103–106 Hz and 25–200℃is<0.025.From the breakdown strength of the material,the carriers inside the composite film have greater energy and concentration at high temperatures,making the PI chain more vulnerable to attack and breakage.The Eb of pure PI film thus decreases from 380 MV/m to 337 MV/m and the β reduces from 14.60 to 8.04 when the temperature increases from room temperature to 200℃.However,the Eb and β of BTB/PI-5 and BTB/PI-7 are higher than those of the pure PI films at the tested temperature.At an optimal BNNS volume ratio,BTB/PI-7 achieves the maximum Eb and β at 25,100,150℃,and 200℃.This can be attributed to the incorporation of wide-band,high-thermal-conductivity BNNS,preventing the composite films from experiencing breakdown caused by electrical or thermal runaway.At 25,100,150℃and 200℃,the energy storage performance of BTB/PI film is higher than that of pure PI film.At an optimum BNNS volume ratio,BTB/PI-7 film achieves the maximum energy density and maintains a stable high efficiency in the tested temperature range.The energy density and efficiency of BTB/PI-7 film are 4.61 J/cm3 and 88.75%(at 465 MV/m) at 25℃,3.95 J/cm3 and 88.08%(at 450 MV/m) at 100℃,3.65 J/cm~3and 88.53%(at 440 MV/m) at 150℃,3.04 J/cm3 and 88.00%(at 380 MV/m) at 200℃.Conclusions The polymer-based composite films were obtained to enhance the high temperature resistant energy storage performance based on the multidimensional synergistic design.The BTB/PI film exhibited stable frequency/temperature-dependence with a dielectric loss of lower than 0.025 at 103–106 Hz and 25–200℃.At 200℃,BTB/PI-7 achieved a high energy density of 3.04J/cm3.Moreover,the energy efficiency of BTB/PI-7 was higher than 88%at 25,100,150℃and 200℃.It was demonstrated that different materials with advantages (i.e.,high polarization,great breakdown strength,and high temperature resistance) were obtained via incorporating various dimensional fillers into the polymer and implementing rational structural design.Consequently,the high temperature-resistant energy storage performance of PI-based composite films could be significantly enhanced.
[1] PING J B, FENG Q K, ZHANG Y X, et al. A bilayer high-temperature dielectric film with superior breakdown strength and energy storage density[J]. Nanomicro Lett, 2023, 15(1):154.
[2] LI J P, JIANG J H, CHEN Y, et al. Enhanced dielectric performance with high-temperature stability by interface-modulation of the core-shell structured imide-polymer@BT nanohybrids in PEI-based nanocomposites[J]. J Mater Chem C, 2023, 11(22):7289–7298.
[3] ZHANG K Y, MA Z Y, DENG H, et al. Improving high-temperature energy storage performance of PI dielectric capacitor films through boron nitride interlayer[J]. Adv Compos Hybrid Mater, 2022, 5(1):238–249.
[4] XIA S M, SHI Z C, SUN K, et al. Achieving remarkable energy storage enhancement in polymer dielectrics via constructing an ultrathin coulomb blockade layer of gold nanoparticles[J]. Mater Horizons, 2023, 10(7):2476–2486.
[5] ZHANG K Y, MA Z Y, FU Q A, et al. Multi-layered boron nitride/polyimide high-temperature capacitor dielectric film[J]. Mater.Today Energy, 2022, 29:101093.
[6] CAI Z M, ZHU C Q, WU L W, et al. Vortex domain configuration for energy-storage ferroelectric ceramics design:a phase-field simulation[J]. Appl Phys Lett, 2021, 119(3):032901.
[7] CHEN X, YANG T N, ZHANG Q Y, et al. Topological structure enhanced nanostructure of high temperature polymer exhibiting more than ten times enhancement of dipolar response[J]. Nano Energy, 2021,88:106225.
[8] WANG P J, GUO Y, ZHOU D, et al. High-temperature flexible nanocomposites with ultra-high energy storage density by nanostructured MgO fillers[J]. Adv Funct Mater, 2022, 32(31):2204155.
[9] FAN M Z, SUN B Z, JIANG J Y, et al. Enhanced energy density in polyetherimide nanocomposite film at high temperature induced by electrospun Ba ZrTiO3 nanofibers[J]. Rare Metals, 2023, 42(6):1912–1922.
[10] ZHU Y K, YAO H, JIANG P K, et al. Two-dimensional high-k nanosheets for dielectric polymer nanocomposites with ultrahigh discharged energy density[J]. J Phys Chem C, 2018, 122(32):18282–18293.
[11] ALI A, AHMAD M N, HUSSAIN T, et al. Materials innovations in2D-filler reinforced dielectric polymer composites[J]. Mater Innovations, 2022, 2(2):47–66.
[12] CHEN H X, PAN Z B, WANG W L, et al. Ultrahigh discharge efficiency and improved energy density in polymer-based nanocomposite for high-temperature capacitors application[J]. Compos Part A Appl Sci Manuf, 2021, 142:106266.
[13] SHANG Y N, FENG Y, ZHANG C H, et al. Excellent energy storage performance in polymer composites with insulating and polarized two-dimensional fillers[J]. Compos Part A Appl Sci Manuf, 2023:107429.
[14] LI Q, ZHANG G Z, LIU F H, et al. Solution-processed ferroelectric terpolymer nanocomposites with high breakdown strength and energy density utilizing boron nitride nanosheets[J]. Energy Environ Sci, 2015,8(3):922–931.
[15] KUANG Z Q, CHEN Y L, LU Y L, et al. Fabrication of highly oriented hexagonal boron nitride nanosheet/elastomer nanocomposites with high thermal conductivity[J]. Small, 2015, 11(14):1655–1659.
[16] WANG X H, YUAN Y, ZHANG Y T, et al. Covalently modified and hierarchically structured corn-like BNNs@BT/benzoxazole composites with enhanced dielectric properties over an ultra-wide temperature range[J]. Compos Part A Appl Sci Manuf, 2022, 160:107027.
[17] HU P H, SUN W D, FAN M Z, et al. Large energy density at high-temperature and excellent thermal stability in polyimide nanocomposite contained with small loading of BaTiO3 nanofibers[J].Appl Surf Sci, 2018, 458:743–750.
[18] DONG J F, HU R C, NIU Y J, et al. Scalable in situ surface-coated polymer dielectrics with significantly enhanced high-temperature breakdown strength[J]. Mater Today Energy, 2022, 30:101158.
[19] LIU H, LI S C, MA L L, et al. High energy density PVDF-based composites with efficient stripping of boron nitride nanosheets[J]. ECS J Solid State Sci Technol, 2023, 12(4):043009.
[20] YANG X L, LI H Y, XIE X Y, et al. Enhancing high-temperature energy density through Al2O3 nanoplates with charge barrier effect in polyetherimide-based composites[J]. Macromol Chem Phys, 2023,224(9):2200457.
[21] SUN B Z, HU P H, JI X M, et al. Excellent stability in polyetherimide/SiO2 nanocomposites with ultrahigh energy density and discharge efficiency at high temperature[J]. Small, 2022, 18(28):e2202421.
[22] CHEN H X, PAN Z, CHENG Y, et al. Inhibition conduction loss for distinct improvement of energy storage density over a broad temperature range in polyetherimide-based composite films[J].Polymer, 2023, 265:125572.
[23] HU H L, ZHANG F, LUO S B, et al. Recent advances in rational design of polymer nanocomposite dielectrics for energy storage[J].Nano Energy, 2020, 74:104844.
[24] NIU Y J, DONG J F, HE Y F, et al. Significantly enhancing the discharge efficiency of sandwich-structured polymer dielectrics at elevated temperature by building carrier blocking interface[J]. Nano Energy, 2022, 97:107215.
[25] DONG J F, HU R C, XU X W, et al. A facile in situ surfacefunctionalization approach to scalable laminated high-temperature polymer dielectrics with ultrahigh capacitive performance[J]. Adv Funct Mater, 2021, 31(32):2102644.
[26] LI Q, CHEN L, GADINSKI M R, et al. Flexible high-temperature dielectric materials from polymer nanocomposites[J]. Nature, 2015,523(7562):576–579.
[27] CHENG S, ZHOU Y, LI Y S, et al. Polymer dielectrics sandwiched by medium-dielectric-constant nanoscale deposition layers for high-temperature capacitive energy storage[J]. Energy Stor Mater,2021, 42:445–453.
[28] FENG Q K, LIU D F, ZHANG Y X, et al. Significantly improved high-temperature charge-discharge efficiency of all-organic polyimide composites by suppressing space charges[J]. Nano Energy, 2022, 99:107410.
[29] AZIZI A, GADINSKI M R, LI Q, et al. High-performance polymers sandwiched with chemical vapor deposited hexagonal boron nitrides as scalable high-temperature dielectric materials[J]. Adv Mater, 2017,29(35):1701864.
[30] SUN W D, LU X J, JIANG J Y, et al. Dielectric and energy storage performances of polyimide/BaTiO3 nanocomposites at elevated temperatures[J]. J Appl Phys, 2017, 121(24):244101.
基本信息:
DOI：10.14062/j.issn.0454-5648.20230737
中图分类号:TB383.2
引用信息:
[1]谭艺鹏,高航,冯梓文,等.基于多维协同的聚合物基复合薄膜的高温储能性能[J].硅酸盐学报,2024,52(04):1250-1256.DOI:10.14062/j.issn.0454-5648.20230737.
基金信息:
国家自然科学基金项目(22109032和51802047);; 广州大学-广东腐蚀科学与技术创新研究院联合研究院基金项目(GI202104)
2024-03-15
2024-03-15
2024-03-15