CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhen Wang,Hairui Zhao,Ding Dai,Haoquan Hao,Zhijiang Wang
SiC aerogel is a novel candidate for electromagnetic absorption (EMA) materials in extreme environments because of its ceramic nature and aerogel morphology. In this study, graphene oxide (GO), which having has been generally serving served as a “brick” in the material community, was used as a building block to prepare SiC aerogel precursors and further develop a novel and designable route for preparing SiC aerogel for EMA. The experimental results suggested that the GO aerogel was well converted into a SiC aerogel with ultra-low density (<4 mg cm −3 ). The synthesized SiC aerogel inherited the precursor well in structure while having a wide absorption band (approximately 5.5GHz) and a high absorption frequency-to-thickness correlation different from traditional SiC aerogels. The above idea for designing and assembling SiC aerogels will significantly broaden the practical applications of GO and SiC in EMA, supercapacitors and sensors.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-17
·
IF 31.6
Liu Chuyang,Xu Lu,Xiang Xueyu,Zhang Yujing,Zhou Li,Ouyang Bo,Wu Fan,Kim Dong-Hyun,Ji Guangbin
The frequency and intensity of multi-magnetic resonance are freely regulated by co-doping La 3+ and Zr 4+ ions.
Zr 4+ occupation is elaborately modified for promoting the portion of polarization/conduction loss to increase profoundly.
The optimized electromagnetic characteristics lead to an ultra-wide bandwidth of 12.5+ GHz around millimeter-wave atmospheric window.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Zhen-Jie Huang,Feng Li,Jia-Ping Xie,Hong-Rong Mou,Cheng-Bin Gong,Qian Tang
The design and synthesis of broad absorption electrochromic materials (ECMs) that modulate visible and near infrared light are important for energy-saving smart windows . Most studies on broad absorption ECMs have focused on transition metal oxides , organic polymers and small organic molecules based on triarylamines, while studies on viologen analogues are scarce. In the current study, two tetra-substituted viologen analogues 4,4′,4″,4‴-(benzene-1,2,4,5-tetrayl)- tetrakis(1-butylpyridin-1-ium) (BTTBP) and 1,1,2,2-tetrakis(4-(1-butyl-pyridin-4-yl)- phenyl)ethane (TBPPE) were prepared by introducing benzene and tetraphenylethylene with large conjugation degrees as parent moieties. Compared with the conventional viologen 1,1′-dibutyl-(4,4′-bipyridine)-1,1′-diium without a conjugated parent, BTTBP and TBPPE exhibited high electrochromic performance and broad absorption to the near infrared region . TBPPE in particular exhibited excellent broad absorption electrochromic behavior with high optical contrast (63% at 733 nm and 46% at 997 nm), distinct color change (pale yellow to yellow-green to black-green), good cycling stability (attenuation in optical contrast of 1% after 1000 cycles at 733 nm) and excellent coloration efficiency (251 cm 2 /C) in the near infrared region. These findings provide a strategy for designing high-performance cathode broad absorption ECMs and a promising candidate for energy-saving smart windows.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 40
·e07925
·
IF 12.1
Jiao Liu,Shuhan Xu,Xukang Han,Mingliang Ma,Xiyao Wang,Wenjuan Ren,Jinhu Hu,Haoyan Duan,Ye-Tang Pan
Effective mitigation of electromagnetic microwave (EMW) pollution requires the development of lightweight, broadband, and high-performance microwave absorbing materials. In this work, a novel Fe 3 SnC/Sn/CNF composite is synthesized via a combination of hydrothermal synthesis, electrospinning, and high-temperature carbonization. The optimal sample (FSC3) achieved a minimum reflection loss ( RL min ) of −28.33 dB and an effective absorption bandwidth ( EAB ) of 6.40 GHz at a thickness of 2.50 mm. To enhance environmental durability and broaden application potential, FSC3 is incorporated into a polyurea (PUA) matrix to fabricate a composite coating. The resulting material exhibited significantly improved microwave absorption, with an RL min of −65.78 dB and an EAB of 6.68 GHz at only 2.17 mm thickness. This enhancement is attributed to increased interfacial and dipolar polarization, as well as improved impedance matching due to the synergy between the filler and the elastomer matrix. Computer Simulation Technology (CST) simulations confirmed excellent Radar Cross Section (RCS) reduction performance, validating its stealth potential. Furthermore, the composite coating displayed enhanced mechanical strength and a hydrophilic surface, broadening its application prospects in harsh environments. This work presents a scalable and versatile strategy for designing multifunctional microwave absorbing coatings with outstanding performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2023
·
IF 17.6
Zhan Wei,Ling Ding,Na Sun,Le-Yang Dang,Hao-Ran Sun,Jie-Cai Han,Jia-Qi Zhu,Gui-Gen Wang
Perovskites have become promising candidates for triboelectric nanogenerators (TENGs) because of their excellent electrical and dielectric properties . Also, and the as-fabricated triboelectric-photoelectric coupled TENG based on those semiconductor characteristics can effectively enhance the device output performance. Herein, a low-toxic lead-free bismuth halide perovskite CsBi 3 I 10 (CBI) film was proposed as triboelectric material for the first time, and a photo-enhanced TENG was designed based on CBI owing to its broad absorption properties . The CBI based TENG exhibits the highest voltage of 158 V and current density of 45.5 mA m −2 in dark condition. Furthermore, under illumination, the triboelectric output of voltage and current are increased by about 21.7% and 15.8% respectively, and the power density of the device can reach up to 4.95 W m −2 . This work not only initiates a new route for applying lead-free perovskite in TENGs but also presents a hybrid TENG for simultaneously harvesting mechanical and light energy based on the triboelectric-photoelectric coupling effect.
研究领域:
材料科学
·
能量收集
·
纳米技术
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tong Wei,Kai Lian,Jiaqi Tao,Hu Zhang,Da Xu,Jiachen Han,Chao Fan,Zihui Zhang,Wengang Bi,Chun Sun
Luminescent solar concentrators (LSCs) can be used as large-area sunlight collectors, which show great potential in the application of building-integrated photovoltaic areas. Achieving highly efficient LSCs requires the suppression of reabsorption losses while maintaining a high photoluminescence quantum yield (PLQY) and broad absorption. Perovskites as the superstar fluorophores have recently emerged as candidates for large-area LSCs. However, highly emissive perovskites with a large Stokes shift and broad absorption have not been obtained up to now. Here, we devised a facile synthetic route to obtain Mn-doped multiple quantum well (MQW) Br-based perovskites. The Br-based perovskite host ensures broad absorption. Efficient energy transfer from the exciton to the Mn dopant produces a large Stokes shift and high PLQY simultaneously. By further coating the perovskites with Al2O3, the stability and PLQY are greatly elevated. A large area of liquid LSC (40 cm × 40 cm × 0.5 cm) is fabricated, which possesses an internal quantum efficiency (ηint) of 47% and an optical conversion efficiency (ηopt) reaching 11 ± 1%, which shows the highest value for large-area LSCs.
研究领域:
材料科学
·
可再生能源
·
太阳能
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）