COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Limeng Song,Yongqiang Chen,Qiancheng Gao,Zhe Li,Xinyue Zhang,Hailong Wang,Li Guan,Zhaoju Yu,Rui Zhang,Bingbing Fan
With the rapid development of modern information technology, high-level electromagnetic wave (EMW) absorbing materials are playing an increasingly important role in military and civilian fields. However, current EMW absorbers usually have narrow absorption bandwidths and low absorption strengths , which hinder their practical applications. Herein, lightweight aerogels with low thermal conductivity and highly efficient EMW absorption were fabricated via a sol–gel method and subsequent carbothermal reduction with a simple chemical reaction process. The as-prepared graphene/SiC-nanosheets aerogels are composed of a large number of the interconnected two-dimensional SiC nanosheets and graphene sheets with abundant micrometer-sized pores that favored impedance matching, which endows the aerogels with outstanding EMW-absorbing performance. Conductive loss and interfacial polarization further promote the EMW-absorbing of the graphene/SiC-nanosheets aerogels. In addition, the highly porous and interconnected three-dimensional graphene/SiC-nanosheets aerogel networks not only facilitate the absorption of infiltrated EM waves via multiple reflection but also effectively reduce the number of heat transmission routes in the aerogels. The as-prepared SiC/G-2 aerogel exhibites excellent EMW-absorbing property, with a RL min of −65.08 dB at a frequency of 13.20 GHz, a thickness of 3.5 mm and an EAB of 2.21 GHz. These results demonstrate that the as-prepared graphene/SiC-nanosheets aerogel is fascinating material with possible applications in high-performance EMW-absorbing and heat-insulating in the aviation and aerospace fields.
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高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
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IF 7.305
Xianglei Liu,Meng Chen,Qiao Xu,Ke Gao,Chunzhuo Dang,Ping Li,Qingyang Luo,Hangbin Zheng,Chao Song,Yang Tian,Haichen Yao,Yi Jin,Yimin Xuan,Yulong Ding
Integrated solar thermal conversion and latent heat storage based on phase change materials (PCMs) has emerged as a promising way for improving solar thermal utilization by avoiding redundant energy transport processes. However, the poor solar absorptance and low thermal conductivity of PCMs prohibit achieving high solar thermal energy storage efficiency. Here, bamboo-derived silicon carbide (BSiC) eco-ceramics based phase change composites are proposed to realize efficient, rapid, and compact solar thermal energy storage. BSiC/paraffin demonstrates a high thermal conductivity of 40 W m −1 K −1 at the porosity of 66%, where 96% pores are filled with paraffin and no prominent deterioration is observed after 2500 cycles. By further loading TiN nanoparticles on BSiC skeletons, an ultrahigh solar absorptance of 96.23% is obtained due to exciting broadband plasmonic resonances. Subsequently, the solar-thermal energy storage efficiency achieves as high as 91.1% at 1.62 W cm −2 . The high-performance solar thermal energy storage benefits from continuous thermal conductive channels and excellent solar absorptance of BSiC/PCMs composites. For high temperature applications , BSiC/LiOH–LiF composites are developed and possess high thermal conductivity of 35.0 W m −1 ·K −1 and large latent heat of 309 kJ kg −1 simultaneously, but corrosion problems need to be tackled before long-time utilization. This work paves the way for applying BSiC eco-ceramics in high-performance solar thermal energy conversion and storage.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 5
·2256-2265
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IF 2.047
Chen Shaoping,Chen Jie,Fan Wenhao,Wang Yaning,Guo Jingyun,Wang Yachao,Jiang Yu,Al-Yusufi Rasha Abdullah Ahmed,Ferhat Marhoun
Mg 2 SiNi 3, is a topologically densely packed intermetallic compound (TCP-IMC) and an excellent diffusion barrier material between nickel and Mg 2 Si-based thermoelectric material. However, even a little migration of the Mg atom from Mg 2 Si to Mg 2 SiNi 3 under the action of a driven force promotes the formation of an Mg deficiency region on the Mg 2 Si side, which destroys the balance of point defects and leads to performance deterioration. In this work, by adjusting the chemical potential of Mg across the Mg x Si 15 Ni 50 /Mg 2 Si ( x = 36, 50, 130) interface, the migration of Mg in thermoelectric material has been suppressed effectively. The results indicate that the contact performance and service stability of the Mg 130 Si 15 Ni 50 /Mg 2 Si interface has been improved by 50% compared to that of Mg 36 Si 15 Ni 50 /Mg 2 Si, which remains quite well after annealing at 400 ℃ for 480 h. TCP-IMC barrier with proper composition is a promising design for the manufacture of TEG interface to ensure its consistency in service especially under a large temperature difference.
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高影响因子
MATERIALS LETTERS
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2022
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IF 3.574
Ying Huang,Xiaopeng Han,Tiehu Li,Xu Sun
The continuous copper thermal-diffusion network of graphite flakes (GFs), aluminum sheets (Als), and Al particles (Alp) was prepared via chemical plating methods. After the vacuum-pressure infiltration process, Cu coatings contacted with other components forming three dimensional thermal diffusion pathways. The prepared Als@Cu/Alp@Cu/GFs@Cu/Al composites exhibited high effective thermal transfer properties. Moreover, the thermal conductivity (TC) of the Als@Cu-2/Alp@Cu/GFs@Cu/Al composite showed the optimal value of 542.66 W/m·K, which was larger than the pure Al matrix about 2.30 times. In this study, the innovative preparation method could be applied to fabricate aluminum-based composites with better thermal diffusion performance.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Yanpeng Wang,Hongguang Fan,Lichong Bai,Jinyue Song,Yongcheng Jin,Shuang Liu,Wansu Zheng,Xiaohui Xie,Wei Liu
As attractive anode materials of lithium-ion batteries, both microsized and nanosized silicon particles have been investigated widely, but each has lots of insurmountable problems to restrict their practical applications. In this work, combining the advantages of microsized and nanosized Si particles, we reported a new thought for constructing micrometer-sized Si/C particles by embedding Si nanoparticles into graphene oxide (GO)-based mirorolls. Differing to the traditional spherical shape, the resulted Si/C microrolls exhibit a unique elastic coil structure with opening ends, facilitating the stress buffer and fast charge diffusion. Besides, in order to maintain the stability of Si nanoparticles in microrolls, we chose the elastic and deformable liquid metal (LM) as the “cloth”, and sodium alginate (SA) as the “thread”, successfully tailor a novel “tight suit” for each Si nanoparticle by a facile self-assembly process. Thanks to the double protection of the conductive-elastic LM-SA coating and the microroll architecture, the resulted Si@LM-SA@GO microroll anode not only has a high Si content of 69 %, a high tap density of 0.62 g cm −3 and a high initial coulombic efficiency of 85.1 %, but also exhibits a superior volumetric capacity of 2506 mAh cm −3 , and a superior cycling performance of 660 mAh cm −3 after 500 cycles at 2 A g − 1 . The full cell constructed using a LiNiCoMnO 2 cathode can achieve a high reversible capacity of 150 mAh g −1 at 1C after 250 cycles, delivering a high-energy density of 510 Wh kg −1 .
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高影响因子
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 8
·1235-1248
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IF 11.534
Song Limeng,Fan Bingbing,Chen Yongqiang,Gao Qiancheng,Li Zhe,Wang Hailong,Zhang Xinyue,Guan Li,Li Hongxia,Zhang Rui
Multifunctionalization is the development direction of personal thermal energy regulation equipment in the future. However, it is still a huge challenge to effectively integrate multiple functionalities into one material. In this study, a simple thermochemical process was used to prepare a multifunctional SiC nanofiber aerogel spring (SiC NFAS), which exhibited ultralow density (9 mg/cm 3 ), ultralow thermal conductivity (0.029 W/(m·K) at 20 °C), excellent ablation and oxidation resistance, and a stable three-dimensional (3D) structure that composed of a large number of interlacing 3C-SiC nanofibers with diameters of 300–500 nm and lengths in tens to hundreds of microns. Furthermore, the as-prepared SiC NFAS displayed excellent mechanical properties, with a permanent deformation of only 1.3% at 20 °C after 1000 cycles. Remarkably, the SiC NFAS exhibited robust hyperelasticity and cyclic fatigue resistance at both low (∼−196 °C) and high (∼700 °C) temperatures. Due to its exceptional thermal insulation performance, the SiC NFAS can be used for personal thermal energy regulation. The results of the study conclusively show that the SiC NFAS is a multifunctional material and has potential insulation applications in both low- and high-temperature environments.
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高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Laihao Liu,Xiuxia Zuo,Yajun Cheng,Yonggao Xia
Nanosized silicon has attracted considerable attentions as a new-generation anode material for lithium-ion batteries (LIBs) due to its exceptional theoretical capacity and reasonable cyclic stability. However, serious side reactions often take place at the nanosized silicon/electrolyte interface in LIBs, where critical electrochemical properties such as initial Coulombic efficiency (ICE) are compromised. On the basis of this feature, a new method is developed to synthesize nanosilicon-based particles in a facile, scalable way, which are endowed with the function of prelithiation and storage stability in air. A semisolid lithium rechargeable flow battery (SSFB) technology is used for the first time to convert the micrometer-sized silicon raw material into an amorphous-nanosilicon-based material (ANSBM), as a result of the pulverization process induced by the repeated lithiation/delithiation cycles. The particle size is successfully reduced from 1–4 μm to around 30 nm after cycles in the flow battery. Bulk functionalization of the nano silicon is introduced by the unbalanced lithiation/delithiation cyclic process, which endows ANSBM with a unique prelithiation capability universally applicable to different anode systems such as nanosized Si, SiOx, and graphite, as evidenced by the significantly improved ICEs. Superior air stability (10% relative humidity) is exhibited by ANSBM due to surface functionalization by the stable interfacial layer encapsulated by electron-conductive carbon. The outcome of this work provides a promising way to synthesize dual-functionalized nano silicon with good electrochemical performance in terms of improved capacity and increased initial Coulombic efficiency when it is composited with other typical anode materials.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Limeng Song,Bingbing Fan,Yongqiang Chen,Hailong Wang,Hongxia Li,Rui Zhang
Multifunctional high-level performance electromagnetic wave (EMW) absorbing materials is receiving increasing attention with the rapid development of modern information technology. However, current EMW absorbing materials usually have single function and poor thermal and chemical stability, which seriously hinders the practical application of these materials. Herein, to broaden the application fields of the EMW absorption materials, a multifunctional SiC nanofiber aerogel (SiC NFA) was prepared by using chemical vapor deposition (CVD) technology in this work. The as-synthesized SiC NFA exhibits a quite low density (∼9 mg cm −3 ), excellent mechanical performance, high fatigue-resistant, satisfactory refractory property, high temperature thermal stability and good thermal insulation performance. Moreover, the oil-modified SiC NFA has a dramatic hydrophobicity , resulting in a good self-cleaning performance. This SiC NFA also achieves a superior EMW-absorbing property with a minimum refection loss (RL min ) value of −39.37 dB at 7.04 GHz when its thickness is 1.9 mm. These inspiring findings lay a foundation for the subsequent development of multifunctional EMW absorbents.
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高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-12
·
IF 23.655
Jiang Yuxin,Chai Liyuan,Zhang Dehe,Ouyang Fangping,Zhou Xiangyuan,Alhassan Sikpaam I.,Liu Sailin,He Yingjie,Yan Lvji,Wang Haiying,Zhang Wenchao
AbstractSection
Highlights
First report of a lithium-ion battery cathode as a deionization electrode for desalination.
A novel approach to suppress manganese dissolution by exposing the (111) facet is proposed.
Excellent desalination performance by the LiMn 2 O 4 /C cathode. The material achieves an ultrahigh desalination capacity of 117.3 mg g −1 at 1.0 V and a longer cycle life (200 cycles without capacity decay) with minor manganese dissolution during the cycling test in 10 mM aqueous LiCl solution.
AbstractSection
Abstract
Battery materials as emerging capacitive deionization electrodes for desalination have better salt removal capacities than traditional carbon-based materials. LiMn 2 O 4 , a widely used cathode material, is difficult to utilize as a deionization electrode due to its structural instability upon cycling and Mn dissolution in aqueous-based electrolytes. Herein, a facile and low-cost ball-milling routine was proposed to prepare a LiMn 2 O 4 material with highly exposed (111) facets. The prepared electrode exhibited relatively low dissolution of Mn during cycling, which shows its long cycle stability. In the hybrid capacitive deionization system, the LiMn 2 O 4 /C electrode delivered a high desalination capacity of 117.3 mg g −1 without obvious capacity decay at a voltage of 1.0 V with a 20 mM initial salt concentration. In addition, the exposed (111) facets significantly alleviated Mn ion dissolution, which also enhanced the structural steadiness.
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高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-20
·
IF 23.655
Song Limeng,Zhang Fan,Chen Yongqiang,Guan Li,Zhu Yanqiu,Chen Mao,Wang Hailong,Putra Budi Riza,Zhang Rui,Fan Bingbing
Traditional ceramic materials are generally brittle and not flexible with high production costs, which seriously hinders their practical applications. Multifunctional nanofiber ceramic aerogels are highly desirable for applications in extreme environments, however, the integration of multiple functions in their preparation is extremely challenging. To tackle these challenges, we fabricated a multifunctional SiC@SiO 2 nanofiber aerogel (SiC@SiO 2 NFA) with a three-dimensional (3D) porous cross-linked structure through a simple chemical vapor deposition method and subsequent heat-treatment process. The as-prepared SiC@SiO 2 NFA exhibits an ultralow density (~ 11 mg cm − 3 ), ultra-elastic, fatigue-resistant and refractory performance, high temperature thermal stability, thermal insulation properties, and significant strain-dependent piezoresistive sensing behavior. Furthermore, the SiC@SiO 2 NFA shows a superior electromagnetic wave absorption performance with a minimum refection loss ( RL min ) value of − 50.36 dB and a maximum effective absorption bandwidth ( EAB max ) of 8.6 GHz. The successful preparation of this multifunctional aerogel material provides a promising prospect for the design and fabrication of the cutting-edge ceramic materials.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
C. Wei,S.B. Zhang,Z.W. Wang,C. Zheng,B. Peng,C. Li,Y. Zhang,X.Q. Li,L.F. Cheng
The appropriate hetero interfacial layer structure between metal and ceramic matrix composites is a very interesting topic in materials science. In this work, an adaptive diffusion reactive interfacial layer composed of “Mo–Mo 2 C–Mo 5 Si 3 –MoSi 2 –SiC” between Mo and SiC f /SiC composite is successfully prepared by chemical vapor infiltration (CVI). This reactive interfacial system is among three possible structures of interfacial layers predicted by Density-functional theory (DFT) calculations, which has the largest total interfacial energy (5.679 J/m 2 ). At the same time, the formation process of the reaction interface layers is elucidated by thermodynamic calculations . In addition, dislocations are observed in Mo 5 Si 3 and Mo 2 C grains, and it is worth mentioning that the Mo 5 Si 3 grains are broken through dislocation movement to form fine grains, which release the residual thermal stress of the interfacial layer system caused by thermal mismatch during the long-term CVI process. Overall, our work provides a practical strategy for developing multilayer heterogeneous composites.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
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IF 6.371
Jie Chen,Wenhao Fan,Yachao Wang,Yu Jiang,Saneyuki Ohno,Zuhair A. Munir,Marhoun Ferhat,Shaoping Chen
In this study we investigated the nature and stability of the interfaces between Mg 2.05 Si 0.98 Bi 0.02 as the TE material and Ni and Mg 50 Si 15 Ni 50 as barriers. Single-leg devices of Ni/TE/Ni and Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 were prepared by the SPS process in one step and were then subjected to different aging conditions. Using Mg 50 Si 15 Ni 50 as barrier provided a more stable interface with no evidence of an interaction layer. This contrasted with the case when Ni was used as a barrier. The efficiency, η , and the power output, P out , were higher when Mg 50 Si 15 Ni 50 was used as a barrier. The Ni/TE/Ni and Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 devices were aged at 673 K for up to 480 h under vacuum and an Mg vapor. For the Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 device, the Seebeck coefficient, the efficiency, and power output showed no change with aging time when aging was carried out under in an Mg vapor. The present observations showed that a stable interface can be attained when Mg 50 Si 15 Ni 50 is used as a barrier for the Mg 2.05 Si 0.98 Bi 0.02 TE material .
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高影响因子
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