CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 25
·45270-45278
·
IF 5.6
Xue Zhang,Chao Yin,Changhai Zhang,Xu Tong,Jianzeng Guo,Tiandong Zhang,Xubin Wang,Qingguo Chi
Dielectric film capacitors, with remarkable high-power densities, charge-discharge speed, and thermal stability, are promising candidates in advanced power electronics technology. However, the capacitor films still face bottleneck problems of low energy storage density and high energy loss. This study presents a novel modification method designed to synergistically enhance both the breakdown strength and polarization properties of barium carbonate (BaTiO 3 , BTO)-based composite films through Zr 4+ doping and sodium bismuth titanate (Na 0.5 Bi 0.5 TiO 3 , NBT) solid-solution modification. The 0.94BaZr 0.2 Ti 0.8 O 3 -0.06NBT composite films synthesized on Pt/Ti/SiO 2 /Si substrates by sol-gel method exhibit exceptional energy storage performance. Notably, the composite films achieve an impressive recoverable energy density ( W rec ) of 62.08 J/cm 3 and a high charge-discharge efficiency( ղ ) of 85.18 % at the electric field of 6117 kV/cm. The promising results highlight the tremendous potential of the modified BTO-based composite films for transformative applications in advanced energy storage systems.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2025
·
IF 4.6
Yapeng Kong,Xiwen Chen,Longdi Ma,Yinxiang Han,Yuran Chen,Liqiang Wang,Yangyang Fan,Xuemin Liang
The molten salt electro-deoxidation, i.e. the FFC (Fray-Farthing-Chen) process, demonstrates considerable potential for the synthesis of tantalum powder. However, its practical application is hindered by the long electrolysis duration. This study proposes an accelerated electro-deoxidation process in molten Na 3 AlF 6 -AlF 3 salts for preparing ultrafine Ta powder, which achieves a sequential cathode phase transformation from Ta 2 O 5 through intermediate NaTaO 3 to Ta. NaTaO 3 is formed through in situ interfacial reactions between Ta 2 O 5 and the electrolyte. We demonstrate for the first time that the growth of the FFC-type intermediate is driven by nanoparticle assembly and oriented attachment mechanism. This growth mechanism is influenced by the structure of the electrolyte/particle interface. By constructing a novel hierarchical pore structure Ta 2 O 5 cathode with optimized interfaces, we facilitated a microstructurally controllable transformation of Ta 2 O 5 to fine NaTaO 3 , thereby effectively mitigating the elongation of oxygen ions solid diffusion pathway induced by intermediate coarsening. In the case of self-assembled NaTaO 3 , the weak bonding between the nanoparticles also favors the kinetics of their subsequent decomposition into Ta. This approach has been shown to enable the complete reduction of 1 g of Ta 2 O 5 within only 1 h, demonstrating a significant enhancement in process efficiency. The resulting Ta powder exhibits uniform monodisperse morphology and good capacitive behavior in Na 2 SO 4 electrolyte solution. The present study may now guide the way towards establishing the electrochemical route for the efficient preparation of many other refractory powders materials.
研究领域:
材料科学
·
电化学
·
粉末冶金
·
纳米技术
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Rui Chen,Tianshu Zou,Biao Zhang,Zhiqi Yang,Yuhang Wang,Pengcheng Yu,Haotian Cheng,Jian Zhao,Xin Liu,Xiaodong Yang,Lili Wang,Yuanqiang Li,Yan Cheng
The frequent movement is an obstacle to the healing of wounds at movable parts. It would be highly beneficial if this characteristic could be utilized to accelerate wound healing process. Herein, we developed a sodium niobate (NNO) hydrogel (NNO-Gel) for promoting healing process of wounds at movable parts based on its photodynamic and piezoelectric properties. NNO-Gel is formed through incorporating NNO into polyvinyl alcohol‑sodium alginate hydrogel using calcium chloride as a cross-linking agent. NNO-Gel could not only produce reactive oxygen species for bacteria inactivation with simulated sunlight irradiation, but also generate electric field for promoting cell migration and proliferation through the frequent movement of necks. With simulated sunlight irradiation, NNO-Gel could kill 95.6 % ± 1.4 % of bacteria, 9.3 % higher than NNO nanomaterials. The cell proliferation rate reaches 148.41 ± 6.37 % by NNO nanomaterials with ultrasound irradiation through activating and phosphorylating phosphoinositide 3-kinase and protein kinase B. For infected neck wounds, NNO NMs and NNO-Gel show 23.6 ± 5.1 % and 25.3 ± 6.1 % higher healing rate than PBS treated ones. The development of NNO-Gel provides an opportunity for transforming the negative frequent movement which prevents wound healing into motive power for promoting healing of wound at movable parts, as well as the possibility of clinic applications for piezoelectric nanomaterials.
研究领域:
材料科学
·
生物医学工程
·
伤口愈合
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Liang Chen,Yuming Zhang,He Qi,Ruiyu Wang,Yunxuan Ji,Takumi Nishikubo,Masaki Azuma,Chang Zhou,Jun Chen
The significant polarization hysteresis under external fields can be stimulated by long-range ordered distortions, including cation displacements and oxygen octahedral tilts, deteriorating the energy storage performance and reliable operation of dielectric capacitors. Here, we propose a strategy of localized distortion to craft a disordered nanostructure landscape, manifested as strongly polar orthorhombic rocks dissociated in the transition region of polymorphic nanoclusters and strong oxygen-tilted blocks embedded in the weak oxygen distortion region, resulting in a smooth polarization response trajectory with large polarization fluctuations, small hysteresis, and delayed polarization saturation. Through localizing distortion, an ultrahigh recoverable energy density of 12.5 J cm–3 can be realized with an inspiring efficiency of 87%, alongside ultrawide capacitance temperature stability (from −100 to 432 °C) far exceeding X9R criteria, showing breakthrough progress in the overall performance for NaNbO3-based lead-free bulk ceramics. This work unveils an effective avenue of localized distortion to develop dielectrics with excellent energy storage performance and the potential to be extended to other functionalities.
研究领域:
材料科学
·
介电与电磁材料
·
能量存储
·
铁电材料
·
陶瓷
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Xueyang Xu,Haibo Xu,Cuilu Xi,Kun Yuan,Xiaomin Bian,Shuoguo Yuan,Esmaeil Heydari,Gongxun Bai
Addressing the pressing concerns of energy shortages and environmental contamination remains critical for achieving sustainable societal development. Combining ferroelectric/piezoelectric catalysts with light-driven materials has emerged as a promising strategy to enhance their synergistic catalytic performance. In this study, we developed a piezoelectric NaNbO 3 /TiO 2 heterojunction for multimodal energy harvesting and catalytic applications. The optimized composite demonstrated excellent piezo-photocatalytic activity through effective coupling of solar and mechanical energy. Under concurrent solar illumination and ultrasonic excitation, the heterojunction catalyst achieved over 96 % degradation of Rhodamine B (RhB) within 60 min, exhibiting significantly enhanced performance compared to the individual NaNbO 3 or TiO 2 components. Moreover, the composite maintained its degradation efficiency through multiple recycling cycles. Mechanistic studies revealed that •O 2 - and h + are the primary active species during the degradation process. This study offers a feasible approach to enhancing photocatalytic performance through mechanical vibration, while contributing to the advancement and utilization of piezoelectric materials for multimodal energy harvesting.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Yueyuan Liu,Feifei Wang,Xiaozhe Chen,Fuhui Cui,Yang Lu,Rongke Gao,Liandong Yu
The widespread application of Internet of Things (IoT) technology promotes the miniaturization and intelligent development of electronic devices, posing significant challenges to the effective microenergy harvesting and optimization of self-powered devices. Here, we present NaNbO3/P(VDF-TrFE)-based piezoelectric nanogenerators (NP-PENGs) based on femtosecond laser surface modification for bioenergy harvesting and human motion monitoring. In this study, NaNbO3 nanoparticles are synthesized by liquid-phase pulsed laser ablation, and the phase structure of P(VDF-TrFE)-based composite materials is processed by femtosecond laser surface modification. The aim is to establish a synergistic system of nanoparticle induction and laser precise control to enhance the content of the β-phase in three dimensions from nucleation initiation, orientation control, and structural stability. Importantly, the output potential of flexible P(VDF-TrFE) and 5 wt % NaNbO3/P(VDF-TrFE)-based PENGs after femtosecond laser processing can reach 26.1 V (36% improvement) and 40 V (52% improvement), respectively. Furthermore, the flexible PENG exhibits great stability under cyclic mechanical stress for 3000 s and successfully powers 20 LEDs. By attaching the NP-PENG to various parts of the human body, it can not only precisely sense human motion status but also real-time monitor the output voltage changes. This study provides an efficient and straightforward method for achieving precise control of high β-phase content and high-performance PENGs, and it demonstrates its enormous potential in the field of intelligent wearable devices.
✓ 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）