ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Shiqin Wan,Xu Hao,Lifeng Zhu,Chang Yu,Mengyi Li,Zheng Zhao,Jianlei Kuang,Ming Yue,Qipeng Lu,Wenbin Cao,Qi Wang
As the rapid development of advanced foldable electronic devices, flexible and insulating composite films with ultra-high in-plane thermal conductivity have received increasing attention as thermal management materials. Silicon nitride nanowires (Si3N4NWs) have been considered as promising fillers for preparing anisotropic thermally conductive composite films due to their extremely high thermal conductivity, low dielectric properties, and excellent mechanical properties. However, an efficient approach to synthesize Si3N4NWs in a large scale still need to be explored. In this work, large quantities of Si3N4NWs were successfully prepared using a modified CRN method, presenting the advantages of high aspect ratio, high purity, and easy collection. On the basis, the super-flexible PVA/Si3N4NWs composite films were further prepared with the assistance of vacuum filtration method. Due to the highly oriented Si3N4NWs interconnected to form a complete phonon transport network in the horizontal direction, the composite films exhibited a high in-plane thermal conductivity of 15.4 W·m–1·K–1. The enhancement effect of Si3N4NWs on the composite thermal conductivity was further demonstrated by the actual heat transfer process and finite element simulations. More significantly, the Si3N4NWs enabled the composite film presenting good thermal stability, high electrical insulation, and excellent mechanical strength, which was beneficial for thermal management applications in modern electronic devices.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Jiaming Zhang,Xianqi Cao,Cheng Peng,Chao Wang,Chunhong Zhang,Lijia Liu,Jianwei Bai,Junqing Li
In this study, an advanced high-temperature-resistant silicate adhesive, SA-AN, was developed by using Ni 2 SiO 4 , Ti, ZrO and Si powders modified silica sol as resin matrix , Al powder and ZnO as curing agents for jointing SiC/SiC composites. The thermal and mechanical properties of SA-AN were evaluated. The structural evolution of SA-AN, the reaction process at the interface, and the fracture mode of the joint were comprehensively investigated. The adhesive was transformed into Al–Ni-rich intermetallic compound-reinforced ceramic composites at high temperatures. Moreover, interfacial reaction of adhesive with SiC/SiC substrate occurred and the resulting diffusion reaction layer effectively relieved the thermal stress between the adhesive and the SiC/SiC substrate. Due to the formation of intermetallic compounds and the occurrence of interfacial reaction, the mechanical properties and heat resistance of the joints were considerably improved. Tensile shear strength of the adhesive was 18.7 MPa after calcination at 600 °C and 17.9 MPa after calcination at 900 °C, which was 65.5% and 94.6% higher compared to the conventional silicate adhesive SA-A, respectively. After 50 cycles of RT-900 °C, tensile shear strength of SA-AN still achieved 10.3 MPa with a retention rate of 61.5%. Furthermore, the mixed fracture pattern of the adhesive joint containing SiC/SiC substrate damage was attained even at 1200 °C of calcination, indicating the effective adhesion at this temperature. As first reported in this study, SA-AN is an efficient high-temperature-resistant adhesive applicable for bonding SiC/SiC composites, which has wide application prospects in aerospace domain.
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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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CARBON
·
2022
·
IF 11.307
Yanhong Lu,Zhantong Ye,Yating Zhao,Qing Li,Meiyu He,Congcong Bai,Xiaotong Wang,Yalu Han,Xingchen Wan,Suling Zhang,Yanfeng Ma,Yongsheng Chen
Carbon coating has been an effective procedure to tackle the severe structural degradation and poor conductivity during cycling of silicon-based anodes in lithium-ion batteries (LIBs). However, the traditional coated carbon usually is tight and thus limit the fast-charging rate and high specific capacity. Herein, through in-situ formation of metal-organic frameworks on the surface, silicon particles were firstly coated by an inside carbon layer . Followed by a solvothermal reaction with the mixture of sucrose and graphene oxide , the second carbon layer outside the silicon particles was deposited, and simultaneously a highly conductive graphene network was formed. After a high temperature pyrolysis process , a graphene matrix supported silicon material with inward multi-channel carbon and outward tight activated carbon was prepared. This unique core/double-layer carbon structure, combined with the highly conductive graphene frameworks, render the material to demonstrate excellent electrochemical performance as anode materials for LIBs in terms of both lithium storage capacity and cycling stability. Thus, the electrode materials deliver a high specific capacity of 1528.1 mA h g −1 at the current density of 0.1 A g −1 and rate capacity retention of 45.5% at 1 A g −1 to 0.1 A g −1 . Simultaneously, a highly stable reversible capacity of 1182 mAh g −1 with 89.5% retention over 240 cycles at a current density of 0.2 A g −1 and 484 mAh g −1 with 76.8% retention after 450 cycles at 1.0 A g −1 were obtained. This work can offer an alternative approach for high-energy and low-cost silicon-based anodes for LIBs.
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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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ACS Applied Materials & Interfaces
·
2022
·
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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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
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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Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 8
·1235-1248
·
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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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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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
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
MATERIALS LETTERS
·
2022
·
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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危险品化学品经营许可证（带存储）