Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Kong Xi,Yang Letao,Meng Fanqi,Zhang Tao,Zhang Hejin,Lin Yuan-Hua,Huang Houbing,Zhang Shujun,Guo Jinming,Nan Ce-Wen
Ceramic capacitors with ultrahigh power density are crucial in modern electrical applications, especially under high-temperature conditions. However, the relatively low energy density limits their application scope and hinders device miniaturization and integration. In this work, we present a high-entropy BaTiO 3 -based relaxor ceramic with outstanding energy storage properties, achieving a substantial recoverable energy density of 10.9 J/cm 3 and a superior energy efficiency of 93% at applied electric field of 720 kV/cm. Of particular importance is that the studied high-entropy composition exhibits excellent energy storage performance across a wide temperature range of −50 to 260 °C, with variation below 9%, additionally, it demonstrates great cycling reliability at 450 kV/cm and 200 °C up to 10 6 cycles. Electrical and in-situ structural characterizations revealed that the high-entropy engineered local structures are highly stable under varying temperature and electric fields, leading to superior energy storage performance. This study provides a good paradigm of the efficacy of the high-entropy engineering for developing high-performance dielectric capacitors.
研究领域:
材料科学
·
电气工程
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产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 8
·086319
·
IF 1.449
Gang Chen,Tao Fan,Shilong Zhang,Cong Xie,Chunlin Fu,Rongli Gao,Zhenhua Wang,Xiaolin Deng,Peigeng Fan,Wei Cai
(100–x) wt% (0.95BT–0.05BY)–x wt% (0.5MgO–0.5SiO2) (x = 0, 1, 2, 4, 8) ceramics were fabricated by using a solid-state synthesis method. The effects of the MgO–SiO2 doping on the microstructure, the ferroelectric, and the dielectric properties of BT–BY ceramics were investigated in detail. The results show that the relative permittivity initially decreases and then increases again upon the increase in the MgO–SiO2 content. The addition of the MgO–SiO2 glass oxide dopant enhances the frequency and the temperature stability of the relative permittivity of BT–BY ceramics. Moreover, the coercive field and the remnant polarization increase and then decrease with increasing MgO–SiO2 dopant content, while the slim P–E loops are observed when x ≥ 2. The largest values for the remanent polarization (1.2 μC cm−2) and the coercive field (9.18 kV cm−1) are obtained at x = 1. The addition of MgO–SiO2 can induce a small leakage current in the BT–BY ceramic when x ≥ 2. The breakdown strength increases with decreasing grain size when MgO–SiO2 is added moderately. Its value increases from 80 kV cm−1 up to 100 kV cm−1 when x changes from 0 to 8. The energy storage density and efficiency of the (100–x) wt% (0.95BT–0.05BY)–x wt% (0.5MgO–0.5SiO2) ceramics decrease and then increase with increasing x. The maximum values of the electrical energy storage density (0.24 J cm−3) and energy efficiency (85.77%) are obtained when x = 8.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 20
·11377-11384
·
IF 3.049
Kaili Wei,Baolai Wang,Jiamin Hu,Fuming Chen,Qing Hao,Guannan He,Yinzhen Wang,Wei Li,Junming Liu,Qinyu He
It's highly desired to design and fabricate an effective Z-scheme photo-catalyst with excellent charge transfer and separation, and a more negative conduction band edge (ECB) than O2/·O2− (−0.33 eV) and a more positive valence band edge (EVB) than ·OH/OH− (+2.27 eV) which provides high-energy redox radicals. Herein, we firstly designed and synthesized a core–shell-heterojunction-structured Z-scheme system BaTiO3@In2S3 (BT@IS, labelled as BTIS) through a hydrothermal method, where commercial BT was used as the core and In(NO3)3·xH2O together with thioacetamide as the precursor of IS was utilized as the shell material. In this system, the shell IS possesses a ECB of −0.76 eV and visible-light-response Eg of 1.92 eV, while the core BT possesses a EVB of 3.38 eV, which is well suited for a Z-scheme. It was found that the as-prepared BTIS possesses a higher photocatalytic degradation ability for methyl orange (MO) than commercial BT and the as-prepared IS fabricated by the same processing parameters as those of BTIS. Holes (h+) and superoxide radicals (·O2−) were found to be the dominant active species for BTIS. In this work, the core–shell structure has inhibited the production of ·OH because the shell IS has shielded the OH− from h+. It is assumed that if the structure of BTIS is a composite, not a core–shell structure, ·OH could be produced during photocatalysis, and therefore a higher photocatalytic efficiency would be obtained. This current work opens a new pathway for designing Z-scheme photocatalysts and offers new insight into the Z-scheme mechanism for applications in the field of photocatalysis.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 22
·12404-12414
·
IF 3.049
Wen Liu,Zunyuan Xie,Yaping Lu,Meixiang Gao,Weiqiang Zhang,Lingxiang Gao
A series of core–shell-structured poly(methylmethacrylate)@BaTiO3 (PMMA@BT) composite particles were constructed via the self-assembly of BT nanoparticles on the surfaces of PMMA cores through the covalent bonding of siloxane groups at room temperature. The PMMA@BT composite particles were characterized by scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray diffraction, video-based optical contact angle measurement, thermogravimetric analysis, and impedance analysis. The electroresponses of the obtained PMMA@BT composite particles were all stronger than that of pure BT, and the electroresponse depended on the weight percentage of the BT shell. The PMMA@BT particles with the optimal core–shell structure contained 58.14 wt% of BT shell. The surface hydrophilicity of the optimal particles was close to that of pure BT, and the dielectric constant was the greatest among the series of synthesized PMMA@BT particles. Thus, the optimized PMMA@BT particles demonstrated the strongest electroresponsive behavior in gelatin hydrogel elastomer, as demonstrated by polarized microscopy and dynamic mechanical analysis. The excellent electroresponsive property of the optimal PMMA@BT particles is reflected by the large sensitivity of the increase in storage modulus for the gelatin hydrogel elastomer containing the composite particles (21% at E = 0.8 kV mm−1 and a particle loading of 1.0 wt%), far greater than that of pure BT particles (4.7%). Based on the sensitive electroresponsive properties, the PMMA@BT particles have potential applications as electroresponsive materials.
研究领域:
材料科学
·
电响应材料
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DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Kunming Shi,Bin Chai,Haiyang Zou,Peiyue Shen,Bin Sun,Pingkai Jiang,Zhiwen Shi,Xingyi Huang
Nanocomposites consisting of a flexible piezoelectric polymer and a reinforcing phase have shown great potential for constructing high-performance piezoelectric nanogenerators (PENGs). However, the weak interface and poor dispersion of piezoelectric reinforcing phase significantly impair the electromechanical properties (e.g. , effective stress/strain, piezoelectric coefficients) of the nanocomposites, thus severely restricting the performance enhancement of the PENGs. In this study, we hydrothermally synthesized the piezoelectric reinforcing phase of BaTiO 3 nanowires , and grafted a layer of high-modulus polymethyl methacrylate (PMMA) onto the nanowire surface via surface-initiated polymerization. The PMMA coating layer forms a strong interface between BaTiO 3 nanowires and the polymer matrix [i.e ., poly(vinylidenefluoride-co-trifluoroethylene)], which efficiently improves dispersion of the BaTiO 3 nanowires and stress transfer at the interface, therefore resulting in an enhanced output performance in the fibrous nanocomposite PENGs. The output voltage and current of the PMMA encapsulated BaTiO 3 (PMMA@BaTiO 3 ) nanowires-based PENG can reach to 12.6 V and 1.30 μA, with a maximum output power of 4.25 μW, which is 2.2 times and 7.6 times higher than the PENG with unmodified BaTiO 3 nanowires and the PENG without BaTiO 3 nanowires, respectively. Furthermore, the flexible PENG exhibits great stability that could continuously generate stable electrical pulses for 6000 cycles without any decline. This study provides a feasible approach of interface tailoring for achieving high-performance piezoelectric nanocomposite and shows the promising potential of the fibrous nanocomposites in biomechanical energy harvesters and smart wearable sensors.
研究领域:
材料科学
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纳米技术
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Xiaofang Liu,Longyin Xiao,Yong Zhang,Huajun Sun
Over the last several years, piezo-photocatalytic effect was intensively investigated for a facile, effective and promising protocol to sewage treatment and environmental remediation. The research on the integration of piezocatalytic and photocatalytic process on lead-free ferroelectric materials is highly demanded to further push this field forward. In this work, BaTiO 3 nanowires (BT NWs) were fabricated by a two-step hydrothermal method. The degradation of organic dye (methyl orange, MO) aqueous solution (5 mg L −1 ) by integrating photocatalysis with the piezoelectric-like effect under UV light radiation and ultrasonic vibration was investigated. The decomposition ratio reaches up to ∼98.17% (at 80 min), which is around 1.28 and 2.24 times of the sole piezocatalysis and photocatalysis process, respectively. The intermediate product of hydroxyl radical (•OH) and superoxide radical (•O 2 − ) was detected and quantified by radical trapping experiments, to illustrating their key role in degrading MO molecules. In addition, we carried out sequential cycles to evaluate the cycling stability and usage durability of catalysts and a reduction of ∼15% in the efficiency was observed after four cycles. This work provides a promising paradigm for the further development of piezo-photocatalytic materials and target applications in environmental field.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6833-6843
·
IF 3.5
Hailan Qin,Jianwei Zhao,Xiaoxin Chen,Hongtian Li,Shenghao Wang,Yuxiao Du,Ahmad Azmin Mohamad,Huanfu Zhou,Dawei Wang
The investigation of lead-free ceramics with exceptional piezoelectric properties holds great importance in the substitution of lead-based materials, hence promoting the development of green technology and fostering an environmentally sustainable society. This study successfully synthesized two series of Bi(Mg 2/3 Nb 1/3 )O 3 (BMN)-modified BiFeO 3 –BaTiO 3 (BF–BT) lead-free piezoelectric ceramics using the conventional solid-state reaction approach. The phase structure, microstructure, dielectric, and piezoelectric properties of these ceramics were comprehensively investigated. A typical perovskite structure is observed in all probed compositions, and the associated phase structure undergoes a gradual transition from a rhombohedral-cubic phase mixture to a cubic-dominant phase structure as increases the content of BMN and BT. All compositions exhibit obvious core–shell microstructures with inhomogeneous element distributions. Most importantly, the BF–0.30BT–0.005BMN and BF–0.34BT–0.03BMN piezoelectric ceramics presented remarkable values for the piezoelectric coefficient (225 pC/N) and converse piezoelectric coefficient (396 pm/V), respectively. These findings highlight the potential of BMN-modified BF–BT ceramics for use in high-performance piezoelectric applications.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Mingxing Chen,Jiawang Sun,Qian Hu,Xinya Wang,Wei Zhang,Yonggui Li
Particulate matter (PM) pollution is widely recognized as a major threat to public health, making the development of thermally stable filters for particulate removal in high-temperature environments critically important. However, the common polymer-based nanofiber air filters are inadequate stability when exposed to high temperature. In this study, the poly (m-phenylene isophthalamide) (PMIA) and nano barium titanate (BaTiO 3 ) which showed remarkable thermal endurance was utilized to prepare the PMIA/BaTiO 3 composite nanofiber air filter. The structure and performance of nanofibers were regulated by changing the addition of BaTiO 3 . The PMIA/BaTiO 3 nanofiber air filter with nano-protrusion structure exhibits high PM2.5 filtration efficiency (98.7%) and low pressure drop (60.4 Pa). Even after being exposed to treatment at 250°C, the PMIA/BaTiO 3 composite nanofiber air filter can still maintain stable filtration performance. The results showed that PMIA/BaTiO 3 nanofiber materials hold promise for eliminating particulate matter in high-temperature environments.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
InfoMat
·
2022
·Vol. 5
·期 1
·e12362
·
IF 24.798
Lu Wang,He Qi,Shiqing Deng,Lingzhi Cao,Hui Liu,Shuxian Hu,Jun Chen
Electrostrictive materials have wide applications in modern high-precision electronic devices. Driven by growing environmental concerns, there is demand for lead-free materials with superior electrostriction behaviors. In this study, we demonstrate a record-high electrostrictive coefficient of ~0.0712 m 4 C −2 in perovskite ferroelectric ceramics, along with hysteresis-free strain as well as excellent frequency and thermal stabilities, in lead-free BaTiO 3 -based ceramics through a polarization nanocluster design. By appropriately introducing Li + and Bi 3+ into the BaTiO 3 lattice matrix, the long-range ferroelectric ordering can be broken, and polarization nanoclusters can be formed, resulting in a relaxor state with concurrently suppressed polarization and maintained electro-strain. A three-dimensional atomic model constructed using advanced neutron total-scattering data combined with the reverse Monte Carlo method indicates the existence of Bi and Li segregations at the subnanometer scale, which confirms the prediction made by density functional theory calculations. Such a short-range chemical order destroys the long-range ferroelectric order of the off-centered Ti polar displacements and leads to the embedding of Li + /Bi 3+ -rich polar nanoregions in the Ba 2+ -rich polarization disorder matrix. Further, a completely reversible electric-field-induced lattice strain is observed, giving rise to pure electrostriction without hysteresis behavior. This work provides a novel strategy for developing lead-free relaxor ferroelectrics with high electrostriction performance.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yinghong Sun,Xichen Du,Haihua Yao,Jimin Chen,Yong Zeng
In this study, the anti-chiral negative Poisson's ratio structure BaTiO 3 piezoelectric ceramics were fabricated by vat photopolymerization 3D printing technology, which obtained an ultra-high transverse piezoelectric coefficient d 31 . Here, we performed uniaxial compressive load simulations and electric field-driven lattice in-plane strain response simulations, which showed an in-plane negative Poisson's ratio of −1 for the BaTiO 3 ceramics. Its strain amplification is about 10 times that of BaTiO 3 bulk material. Using the principle of positive and negative piezoelectric effects, we measured effective transverse piezoelectric coefficients d 31 for different dimensional parameters. The effective transverse piezoelectric coefficient d 31 with a maximum of 599 pm/V was detected at a ligament aspect ratio of 3.6 for the negative Poisson's ratio BaTiO 3 piezoelectric ceramics , which is 7.7 times higher than that of the bulk material. For the prepared hydrophone, test results show that the effective hydrostatic strain constant d h and Hydrostatic Figure of Merit (HFOM) of BaTiO 3 piezoelectric ceramics with a negative Poisson's ratio structure are 29.6 and 808 times higher than those of bulk BaTiO 3 .
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Dailu Jia,Chao Lei,Wei Ren,Chenghui Liu
In this work, we report a new generation of single microbead bioassay that employs a single BaTiO3 microbead as an optical booster for target biomarker enrichment and optical enhancement toward protein and nucleic acid analysis. The single BaTiO3 microbead can not only concentrate the target molecules by nearly 104-fold but also act as an optical booster to prominently enhance the target-induced fluorescence signal by the whispering gallery mode for improving the excitation efficiency and the microlens effect for promoting the signal collecting efficiency, respectively. Compared with using a conventional single microbead, this optical booster exhibits nearly 2 orders of magnitude higher sensitivity without the assistance of any signal amplification techniques or costly instruments. Moreover, this single microbead optical booster is capable of detecting different kinds of protein and nucleic acid biomarkers in a simple mix-and-read manner, holding great potential for early clinical diagnosis.
CAS / MDL:
研究领域:
生物传感
·
光学技术
·
分子诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
Zhen Chen,Guiqiu Li,Xinlong Zheng,Yuhao Liu,Jun Dai,Bo Huang,Meng Xia,Lulu Yan,Qi Chen,Yijun Shen,Dong Wang,Meng Li,Wei Xiao,Xinlong Tian,Juanxiu Xiao
The polarization electric field feature of piezoelectric materials is greatly beneficial to enhance the separation and migration of photogenerated carriers. Herein, we propose a BaTiO 3 /CuPbSbS 3 (BTO/CPSS) heterostructure photocatalyst through the combination of hydrothermal and facile butyldithiocarbamate acid (BDCA) solution process, in which the catalytic degradation performance of BTO/CPSS can be effectively enhanced by the synergistic effect of piezoelectricity and semiconductor properties. Through dedicatedly adjusting the loading amount of CPSS, the Rhodamine B (RhB) degradation efficiency of BTO/CPSS achieves 9.33×10 −2 min −1 along with a strong catalyst stability, which is attributed to the prolonged charge life time due to the piezoelectricity of the optimal BTO/CPSS. Moreover, the heterostructure of BTO/CPSS and polarization effect of BTO can further enhance the separation of electron-hole pairs, which can provide stronger driving force for catalytic degradation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）