Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 34
·13859-13867
·
IF 0
Chengxin Peng,Huixin Chen,Qiongyu Li,Weiwei Cai,Qin Yao,Qingsheng Wu,Jinhu Yang,Yong Yang
The silicon material is the most promising candidate for developing new-generation lithium-ion batteries with high energy and power output. However, there remains a significant challenge due to poor electrical conductivity and pulverization of the silicon based anode during cycles. Aiming to solve these problems, in this work we fabricate a novel 3D composite architecture made of a Si@SiOx core–shell nanowire array grown on a 3D graphitic foam (Si CNW–3D GF) substrate by a well-designed multiple-step approach. The prepared Si CNW–3D GF composite shows the integrated advantages for high-performance lithium ion batteries, including its light weight, open macroporosity, high conductivity, high Si NW loading, excellent flexibility as well as SiOx buffer layers. As a result, the Si CNW–3D GF composite exhibits excellent performance such as high reversible lithium storage capacity (3603 mA h g−1 at a current density of 840 mA g−1), excellent cycling performance (up to 100 cycles) and superior rate capability (2299 mA h g−1 at 4200 mA g−1 and 1206 mA h g−1 at 8400 mA g−1), which is 2 times that of the Si CNW electrode where Si CNWs were grown directly on a stainless steel current collector without the presence of 3D GF.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
·
电池技术
✓ 已验证
DOI
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Hao Li,Samah Awadh Ali Mahyoub,Wenjie Liao,Shuqian Xia,Hechuan Zhao,Mengya Guo,Peisheng Ma
The magnetic biochars were easily fabricated by thermal pyrolysis of Fe(NO 3 ) 3 and distillation residue derived from rice straw pyrolysis oil at 400, 600 and 800 °C. The effects of pyrolysis temperature on characteristics of magnetic biochars as well as adsorption capacity for aromatic contaminants (i.e., anisole, phenol and guaiacol) were investigated carefully. The degree of carbonization of magnetic biochars become higher as pyrolysis temperature increasing. The magnetic biochar reached the largest surface area and pore volume at the pyrolysis temperature of 600 °C due to pores blocking in biochar during pyrolysis at 800 °C. Based on batch adsorption experiments, the used adsorbent could be magnetically separated and the adsorption capacity of anisole on magnetic biochars was stronger than that of phenol and guaiacol. The properties of magnetic biochar, including surface area, pore volume, aromaticity, grapheme-like-structure and iron oxide (γ-Fe 2 O 3 ) particles, showed pronounced effects on the adsorption performance of aromatic contaminants.
研究领域:
环境科学
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环境工程
·
材料科学
·
物理化学
·
污染控制化学
·
能源材料
·
吸附科学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 7
·1901815
·
IF 4.948
Minglong Yang,Qiang Wei,Jianjun Li,Yao Wang,Hongfei Guo,Liya Gao,Li Huang,Xiaodong He,Yibin Li,Ye Yuan
Inspired by the traditional Chinese “pancake-making” method, the efficient electromagnetic interferences (EMI) shielding composite carbon films are conveniently obtained by assembling graphene oxide (GO) sheets, carbon nanotubes (CNTs), and Co/C nanocomposites into a laminated “nacre-like” structure. The developed composite carbon films are characterized by a shielding effectiveness (SE) up to ≈51 dB in X band with a small thickness of ≈34.3 µm. Moreover, the composite carbon film shows favorable flexibility and the SE values almost keep a constant after repeatedly bending test. These results demonstrate a promising approach to simply fabricate a flexible and highly efficient EMI shielding material.
研究领域:
材料科学
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纳米科技
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复合材料
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电磁功能材料
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柔性电子学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2012
·Vol. 24
·期 24
·3201-3204
·
IF 13.877
Shaohua Liu,Haiping Jia,Lu Han,Jiulin Wang,Pengfei Gao,Dongdong Xu,Jun Yang,Shunai Che
Graphical Hierarchical porous TiO 2 –B with thin nanosheets is successfully synthesized. TiO 2 –B polymorph ensures fast insertion of Li-ion due to its pseudocapacitive mechanism. The thin nanosheet walls with porous structure allow exposure to electrolytes for facile ionic transport and interfacial reaction. The joint advantages endow this material with high reversible capacity, excellent cycling performance, and superior rate capability.
研究领域:
材料科学
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电化学
·
纳米科技
·
能源存储
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无机非金属材料
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电极材料
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锂离子电池
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Min Guan,Xingye An,Hao Zhang,Guihua Yang,Zhongjian Tian,Shuangxi Nie,Liqin Liu,Zhengbai Cheng,Haibing Cao,Hongbin Liu
Global liquid packaging industry has been greatly spurred by the rapidly growing food & beverage industry all over the world. Liquid packaging board (LPB), as the main composition (75–80 %) of laminated liquid packaging cartons, must possess high-quality of hydrophobicity and physical properties for excellent leak-proof and protecting the packaged commodity. Herein, in this study, lignin is selected to prepare lignin cationic surfactant (LCS) by quaternary ammonium modification. Then cationic lignin modified rosin size ( L -CDRS) with uniform microsphere structure and high colloidal stability is successfully synthesized via a phase inversion process to improve the sizing performance and mechanical properties of LPB. The cation modified LCS presents improved amphipathicity of rich cationic charges and hydrophobic benzene ring skeleton, thus enhancing the electrostatic interactions between LCS and pulp fibers and improving the sizing performance of L -CDRS. The sizing performance of LPB is evaluated by varying the LCS dosages within L -CDRS and concluded that the edge penetration value and Cobb value of LPB handsheets exhibit an improved size performance with 2 % LCS within L -CDRS, implying the formation of homogeneous hydrophobic surface layer induced by the well-distribution of L -CDRS. In addition, the tensile index of LPB increased from 19.74 N·m/g to 25.96 N·m/g assisted by 2 % LCS emulsified L -CDRS, indicating an improved mechanical property. This study puts forward a practical and facile strategy to improve the sizing performance and mechanical properties facilitated by lignin enhanced rosin size and will further broaden the application range of traditional rosin size and lignin in LPB products.
研究领域:
造纸工程
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高分子材料
·
表面化学
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生物质利用
·
包装材料
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 3
·2101843
·
IF 9.926
Ziyu Chen,Jiaxin Yang,Rui Xu,Zejia Zhao,Xu Sang,Lisa Liu,Ming Feng,Feng Song,Yonghong He,Wei Huang
Optical encryption provides a significant implementation strategy for information security, which can be ascribed to multichannel, simple operation, and high security. Multiple responsive luminescent material has emerged as an ideal candidate for optical encryption, owing to intelligent responsive ability and unclonable security. Herein, a structural doping strategy is developed in the layer-by-layer self-assembly process to elevate the maneuverability of light-emitting color and mode. By encapsulating lanthanide doped inorganic matrix and layered hydroxide with PMA, the recognizable red-orange fluorescence can be produced in the invisible region, and realizes the conversion of yellow and green fluorescence in visible region. Meanwhile, both excitation source and emission color can be used as distinguishable encryption means, which enables structural doping complex to be multiplexed and encoded with high capacity and complexity. Furthermore, asymmetrically and symmetrically coded flexible labels with specific color sequence are prepared by brushing process, and specific encryption key are set to ensure the nonlinearity of cryptosystem. Through the integration of dual-mode and adjustable light response codes constructed by structural doping strategy, multidimensional high-level information encryption can be realized, which opens up a deep exploration in the field of information security for the application of multifunctional optical properties of light response materials.
研究领域:
材料科学
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纳米科技
·
光学工程
·
信息安全
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功能材料
·
光子学
·
智能材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2012
·Vol. 39
·期 4
·3915-3919
·
IF 1.751
Junxia Wang,Hengchang Nie,Chunfeng Lan,Genshui Wang,Xianlin Dong,Xuefeng Chen,Fei Cao,Hongliang He
Porous Pb (Zr 0.95 Ti 0.05 ) O 3 / x MgO (PZT/MgO, x =0, 0.1, 0.2, 0.5 and 1.0 wt%) ferroelectric ceramics were prepared with MgO nanoparticles as reinforcing phase. The effects of MgO nanoparticles on the phase, microstructure, electrical and mechanical properties of as-prepared ceramics were investigated. The results show that the grain size is reduced obviously when increasing the amount of MgO. Compared with pure porous PZT, T C of MgO-added PZT ceramics shifts to higher temperature. Moreover, dielectric, ferroelectric and piezoelectric properties show no much degradation. Further, PZT/MgO ceramics possess enhanced mechanical properties compared to pure porous PZT ceramics, the largest increment of the fracture toughness and hardness being 31.3% and 19.8%, respectively. The optimal electrical and mechanical properties are obtained with the addition of less than 0.5 wt% MgO nanoparticles.
研究领域:
材料科学
·
无机非金属材料
·
功能陶瓷
·
电子材料
·
固态物理
·
纳米复合材料
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 44
·17502-17510
·
IF 3.069
Jie Ren,Zhenguo Wang,Yu Feng,Bangjun Guo,Ke Yu,Ziqiang Zhu
In this work, we report the first-principles investigation and synthesis method for a hollow-MoS2/C heterostructure applied to a hydrogen evolution catalytic material. First principles investigation was used to calculate the free energy of hydrogen ion adsorption at the heterostructure interface at different surface adsorption ratios. The change of the density of states before and after carbon coating proved that carbon coating improves the conductivity of the catalyst. Higher reactivity areas and higher conductivity can significantly improve hydrogen evolution catalytic performance, which is also demonstrated by electrochemical testing. Hollow-MoS2/C exhibits a low onset overpotential of 96 mV and a low Tafel slope of 67.4 mV dec−1, as well as good catalytic stability. The composite catalyst prepared by a two-step method has a larger specific surface area and a larger porosity, can significantly suppress the collapse and stacking effect caused by the electrode circulation process, and improve the cyclic reversibility and stability of the material. This work is expected to provide a meaningful reference for solving the problem of cycling performance degradation of non-precious metal-catalyzed hydrogen evolution materials.
研究领域:
材料化学
·
电化学
·
纳米材料科学
·
催化化学
·
能源材料
·
理论计算化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Na Zhang,Yu Liu,Jianhua Yang,Shuming Zhang,Shiyang He
The Si-TiO 2 based composites with a nanosized multi-sphere structure have been developed as novel anode for lithium ion cells . The Si spheres are highly embedded within the titanium dioxide nanoparticles via a hydrothermal synthesis route. The as-proposed sphere-stack like morphology achieves a superior cycling stability for lithium storage. The existence of TiO 2 is in favor for the mechanical stability of Si during charge-discharge and conversely reduces the obtained capacity of the composite. Furthermore, the Si/TiO 2 composite is coated by pyrolysized carbon. The reversible discharge capacity of the Si/TiO 2 /C composite reaches to 976 mAh g −1 after 50 cycles. Carbon coating is beneficial for the rate capability of the Si/TiO 2 based composite.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 51
·期 5
·6587-6598
·
IF 5.1
Bo Li,Yigao Chen,Shaopeng Wang
A (ZrC/SiC) 35 multilayer alternating coating with 500∼700 nm sublayers thickness and 70 interfaces was deposited on sharp leading edge C/C composites by continuous CVD method. Its mechanical property and ablation resistance were assessed by scratch test and oxy-acetylene flame respectively and compared with ZrC monolayered coating. The (ZrC/SiC) 35 multilayer alternating coating exhibited a high bonding strength via the regulation of sub-micro alternating stress field and the inhibition of crack propagation by 70 interfaces, showing a high critical load L C3 of 22.521 N, which was higher than that of ZrC monolayered coating of 5.688 N. Furthermore, the coating revealed excellent ablation resistance evidenced by its intact oxide layer, and the mass and linear ablation rates were only 0.17 mg/s and 0.87 μm/s respectively. The layer-by-layer oxidation behavior allowed the advantages of ZrC and SiC sublayers to be fully utilized, thus maintaining the layered oxide structure. Furthermore, the total 35 layers of thin ZrO 2 layers improved the fault tolerance ability of coating in harsh ablative environments.
研究领域:
材料科学
·
表面工程
·
高温防护涂层
·
复合材料
·
力学性能
·
热防护系统
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Jian Zhou,Dan Sun,Lei Wang,Leiming Guo,Wei Chen,Fengjiao Yu,Yong Wang,Yang Yang
Mixed-matrix membranes blended with nanosized inorganic fillers have been widely used in ultrafiltration (UF) for large molecule separation. In this work, we provide a feasible route to construct mixed-matrix polysulfone (PSf) UF membranes via the nonsolvent-induced phase inversion process, utilizing sheet-like copper iodide superstructures (s-CuI) as fillers. The size of s-CuI in lateral dimension reaches micrometer scale, but the nanosheets can be well embedded in the polymer matrix with their 2D basal planes parallel to the membrane surface . On account of the stacking straight-through channel structure of s-CuI and its large dimension spanning across multiple membrane pores within the layer, the PSf membrane blended with 0.8 wt% content of s-CuI displays optimal UF performance with a pure water permeation (PWP) of 1473 L/(m 2 h bar) and a bovine serum albumin (BSA) rejection of 92%. In contrast, the pure PSf membrane only presents a PWP of 556 L/(m 2 h bar) and a BSA rejection of 58.2%. Besides, the enhancement of mechanical stability for the PSf/s-CuI 0.8% membrane is significant and the leakage of the s-CuI filler is negligible. Though the antifouling performance of the PSf/s-CuI 0.8% membrane against the protein BSA is limited, its flux is always 2–3 times higher than that of the pure PSf membrane in each step during a sequential test of fouling behavior . This study indicates that it is highly promising to employ designable superstructures as functional fillers to construct novel mixed-matrix membranes with good interfacial compatibility and superior performance.
研究领域:
材料科学
·
膜分离技术
·
高分子化学
·
纳米复合材料
·
生物分离工程
✓ 已验证
DOI
高影响因子
Solar RRL
·
2021
·Vol. 6
·期 3
·2100554
·
IF 8.582
Daiyu Li,Pei Jiang,Wenhao Zhang,Jiankang Du,Chen Qiu,Jiale Liu,Yue Hu,Yaoguang Rong,Anyi Mei,Hongwei Han
Perovskite solar cells (PSCs) have achieved a certified power conversion efficiency (PCE) of 25.5% and show potential for low-cost photovoltaic applications. One key of pushing PSCs into industrialization is enlarging their areas. However, the PCE of larger-area PSCs is dramatically limited by the undesired increase in series resistance ( R S ), which leads to obvious loss of fill factor (FF). Herein, R S in fully printable mesoscopic PSCs is modulated with a carbon electrode by optimizing the device geometry, preparing busbars to collect currents from electrodes and improving the conductivity of the back electrode. A rectangular device shape and tin busbars on conductive substrate effectively reduce the R S . Meanwhile, an additional hot-pressed highly conductive low-temperature carbon layer on the back carbon electrode also reduces the R S . An enhanced PCE of 13.99% for 1 cm 2 PSCs by R S modulation is obtained, whereas the control device exhibits a PCE of 7.74%. The PCE increase is due to the improvement of FF from 0.372 to 0.638 with reduced R S from 27.13 to 9.66 Ω cm 2 .
研究领域:
材料科学
·
能源材料
·
光伏技术
·
纳米结构材料
·
电化学
·
器件物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）