Sustainable Energy & Fuels
·
2022
·Vol. 7
·期 4
·1084-1092
·
IF 6.813
Muhammad K. Majeed,Rashid Iqbal,Arshad Hussain,Mina Lotfi,M. Umar Majeed,M. Zeeshan Ashfaq,M. Sufyan Javed,Muhammad Ahmad,Adil Saleem
Through collective use of experimental investigation and theoretical approaches, i.e., X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, microscopic properties and density functional theory (DFT) calculations, we comprehensively characterize the structural, morphological, and lithium (Li) storage performance of double-shelled silicon@ZIF-8@ZIF-67 (Si@DNC). The unique architectures not only absorb the huge volume variation stress of Si during cycling but also provide enhanced electrical conductivity and manipulate the stability and integrity of a well-wrapped double-shelled framework. Additionally, N-doped carbon can also enhance the conductivity of electrodes. The superior Li storage performance in double-shelled structures is refined via an interactive lithiation/delithiation approach and validated using DFT calculations. Typically, the as-prepared Si@DNC delivered enhanced cycling stability with a high discharge capacity of 2537.8 mA h g−1 in the first cycle and 1285 mA h g−1 after 200 cycles at 200 mA g−1. Therefore, the double-shelled structure reflected outstanding electrochemical performance and is expected to be a forthcoming candidate for anode materials in next-generation lithium-ion batteries (LIBs).
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
计算材料学
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Wanting Zhou,Kaiyang Zheng,Ranxiao Ao,Chenyu Yan,Yihui Li,Aidong Tang,Huaming Yang
The commercialization of lithium-sulfur (Li–S) batteries is primarily hindered by the polysulfide shuttle effect and sluggish reaction kinetics. Engineering a host material that synergizes efficient polysulfide confinement with high electrical conductivity, through a simple and potentially scalable process, remains a key challenge. Here, we demonstrate a facile, one-pot hydrothermal strategy to cost-effectively convert abundant natural halloysite clay into a mesoporous silicon-carbon composite (MHSC). This process effectively establishes an intimate Si – C bonded interface between the conductive carbon network and the polar silica framework, inherited from the mineral precursor. The resulting MHSC host exhibits excellent electronic conductivity (0.011 S cm −1 ) and strong polysulfide adsorption. When evaluated as a sulfur cathode, the MHSC/S composite delivers a high initial capacity of 1213 mAh·g −1 at 0.2 C and, more importantly, exceptional long-term stability with a negligible capacity decay rate of only 0.089% per cycle over 700 cycles at 1 C. This work provides a commercially viable and environmentally benign route for manufacturing high-performance Li–S battery cathodes by upcycling natural clay resources.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xue Song,Erying Xu,Weishuang Lou,Hailiang Zhao,Guanghui Yan,Xiaodan Lou,Yingming Zhang,Yongde Liu,Guihua Yan
Wheat dust (WD) is a mixed organic dust produced during the storage, transportation and processing of wheat, and its components include cellulose and ash, etc. To achieve its resource utilization, a “one-step” alkali-activated pyrolysis method was developed to prepare a Si-containing biochar (Si-WDB). Response surface methodology (RSM) was employed to optimize adsorption conditions for oxytetracycline hydrochloride (OTC). The specific surface area of Si-WDB increased to 241.75 m 2 /g, approximately 331 times that of the pristine WD (0.73 m 2 /g). Semi-quantitative pore-structure analysis suggested that mesopore-associated surface accommodation could account for approximately 72.47% of the measured adsorption capacity. Multi-scale characterizations and DFT calculations suggested that endogenous silicon was redistributed into or associated with the carbonaceous matrix during pyrolysis, providing Si-containing sites that might contribute to OTC adsorption through localized Si-involved interactions, together with π–π EDA interactions and hydrogen bonding. Life cycle assessment (LCA) confirmed a lower carbon footprint (7.06 kg CO₂ eq/kg Si-WDB), highlighting the environmental sustainability of the waste-to-resource strategy. This study established a sustainable pathway for upgrading silicon-rich agricultural waste into biochar adsorbent for antibiotic contaminated water remediation.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Xiangyang Zhuang,Yao Zhang,Lingxiao He,Yunfeng Zhu,Qifeng Tian,Xinli Guo,Jian Chen,Liquan Li,Quan Wang,Guanzhou Song,Xiaoxiao Yan
In the present work, the sample of Si nanoparticles embedded in porous C (denoted as Si@porous-C) has been successfully synthesized by using nano-MgO as the pore-former. Observations by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) on Si@porous-C sample reveal that Si nanoparticles homogeneously disperse in porous carbon scaffold. As anode of lithium ion battery (LIB), Si@porous-C preserves a charge-discharge capacity of 1172 mAh g −1 after 40 cycles, possessing enhanced cyclic deterioration of only 0.35% per cycle in comparison with Si nanoparticles and Si nanoparticles embedded in ordinary carbon (denoted as Si@C). It delivers reversible capacities of about 947 mAh g −1 , 670 mAh g −1 , and 394 mAh g −1 in current densities of 1000 mA g −1 , 2000 mA g −1 , and 4000 mA g −1 , respectively, all of which are higher than those of commercial nano-silicon and Si@C. The improved high-rate capability of Si@porous-C could be attributed to a decreased resistance and enhanced infiltration of electrolytic solution around nano-silicon particles. The merits of scalable synthetic process and improved electrochemical properties recommend Si@porous-C as a promising anode material for high performance Li-ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Xiaoyang Wang,Kaihua Wen,Tianhua Chen,Shimou Chen,Suojiang Zhang
Considering the high theoretical specific capacity (4200 mAh/g), silicon is perceived as one of the most promising anode materials for lithium-ion battery, but the large volume change during the process of de/lithiation affects its cycle performance and practical application. With the assist of supercritical CO 2 fluid (scCO 2 ), graphite is exfoliated to folded graphite (FG) flakes. Meanwhile, the composite of Si/CNTs@FG with a hierarchical conductive network structure was constructed, where the silicon nanoparticles and carbon nanotubes (CNTs) were homogenously attached to the interlayer of FG. The hierarchical conductive network composed of FG and CNTs not only promotes the electrons transfer process but also relieves volume expansion stress of silicon. The Si/CNTs@FG exhibits remarkable Li storage performance, delivering high specific reversible capacity (1204 mAh/g at the current density of 0.2A/g), high capacity retention (970 mAh/g after 100 cycles) and excellent rate performance (635.2 mAh/g at 2 A/g). This study provides a facile and scalable approach to prepare a silicon-based anode material with excellent electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yang Bai,Yanbiao Zhao,Weidong Li,Linghui Meng,Yongping Bai,Guorong Chen
Solid sulfide electrolyte has been researched for several years, and a high ionic conductivity has been acquired. However, it is difficult to apply in industrial manufacturing partly because the raw materials, such as SiS2, GeS2, P2S5, et al., have strict preparing conditions and are sensitive to water and oxygen in the air. Herein, we report a new method to produce solid sulfide electrolytes Li9.54Si1.74P1.44S11.7X0.3 (LSiPSX) (X = F, Cl, Br, I), that is, using elementary substances Si, P, and S as the starting raw materials, which not only is a promising way to ease the harsh storage conditions of the SiS2 and P2S5 as starting raw materials but also provides a feasible choice for the preparation of solid sulfide electrolyte. The conductivity of solid sulfide electrolyte is further adjusted by controlling the particle size of raw material silicon and the different halogen doping. As a result, the Li9.54Si1.74P1.44S11.7I0.3 releases the highest ionic conductivity of 1.35 mS/cm at room temperature and a wide electrochemical window up to 9 V versus Li/Li+ which is prepared from the 3 nm particle size Si and I doping. The all-solid-state lithium–sulfur battery (ASSLSB) is constructed with LSiPSI and with a good performance. Our study demonstrates the possibility of preparing the LGPS crystal type solid sulfide electrolytes by using elementary substances.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 25
·8020-8028
·
IF 7.393
Minghao Yi,Xunjun Chen,Peter S. Shuttleworth,Lewen Tan,Yunqing Ruan,Yixin Xu,Jiefeng Zheng,Shufang Wu,Sen Hu,Simin Xie,Zhixing Guan,Guoqiang Yin,Yingde Cui
Transparent and easily fabricated films were obtained through the coupling of eugenol, a bio-sourced feedstock, and poly(methylhydrosiloxane), via the Piers–Rubinsztajn reaction and Pt-catalysed hydrosilylation. The precursor reagents are readily available and economical, and the reaction process used was mild and easily undertaken. Additionally, poly(methylhydrosiloxane), having an abundant source of pendant Si–H groups, can be cross-linked with eugenol at multiple juncture points, and thus the eugenol content in these films ranges from 13.12 to 45.42 wt%. It was found that as the eugenol content increased, the thermal stability of the films also improved, with T10% and Rw at 700 °C ranging from 350.1 to 584.3 °C and 46.41 to 86.63%, respectively, which is higher than other analogous biomass-derived polysiloxanes. Crucially, the prepared films also exhibited suitable optical properties, with a >90% transmittance within the 430–1100 nm region and near 100% absorbance in the UV region (<350 nm), verifying their potential applications as optical encapsulants. Aside from good light transmittance, the refractive index of the films increased from 1.44 to 1.52 (at 450 nm) with higher ratios of eugenol. This demonstrates their suitability for use as high-refractive index (>1.5) LED encapsulants and also in stacked multi-layer reflectors. In addition, to protect the encapsulated chips from moisture erosion, these films exhibit good water vapour barrier properties and water repellence.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part B-Physics
·
2023
·
IF 1.4
Bo Zhang,Ruixin Wang
Compared with other types of sensors, capacitive flexible pressure sensors (CFPS), with low sensitivity, are more susceptible to environmental changes. It is still a considerable challenge to achieve high sensitivity, excellent mechanical properties and long-time structural stability simultaneously. Targeting the aforementioned issues, herein, Ti3C2 (MXene) with high dielectric constant was firstly chemically modified with a poly(ionic liquid) (PIL) via surface-initiated ATRP, and then combined with a porous polyurethane foam (PUF) 3D network structure via a one-step blending foaming method. Thanks to the organic-inorganic hybrid network based on the PU/MXene porous structures and the uniformly distributed micro-capacitor structure provided by MXene@PIL, the mechanical properties, structural stability, flame retardancy and dielectric properties of the composite foam were all significantly enhanced. When the content of MXene@PIL was 10%, the sensitivity of CFPS based on this dielectric were 17.1, 5.2, and 2.5/KPa in the pressure ranges of 0-1 KPa, 1-12 KPa and 12-100 KPa, respectively. In addition, the sensor showed the response and recovery times of 88 and 82 ms under a low pressure of 355 Pa. The light, flexible sensor prepared in this work is expected to be used in wearable devices to monitor physiological signals, and it should also be a good candidate for the next generation of man-machine interface characterization devices.
研究领域:
材料科学
·
高分子科学
·
纳米技术
·
传感器技术
·
化学工程
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Wennan Su,Chi Zhang,Xiufang Cui,Guo Jin,Changhao Liu,Erbao Liu,Jian Li,Haonan Zhao,Boyu Cao,Haoliang Tian
YF 3 modification NiTi-Si coatings were prepared on Ti-6Al-4 V substrate by laser cladding. On this foundation, heat and cryogenic treatments were conducted respectively to explore the effect of after-treatment procedures. The consequence of post-treatment methods on the phase constituent, microstructure, mechanical property, and phase transition characteristics of post-treatment coatings was studied. The phase constituent of the three coatings was roughly the same, composed of NiTi and NiTi 2 . The results show that heat treatment led to the coarsening of NiTi phase grain size and increased Si content in the NiTi 2 phase. In addition, due to the rapid cooling rate provided by cryogenic treatment, the spinodal decomposition of the Si element occurred in the NiTi 2 phase. Furthermore, the post-treatments also affected the phase transformation characteristics of the coatings. As the temperature of martensitic transformation is sensitive to the content of Ni element in the NiTi phase, the M s and M f points of the heat treatment coating were slightly higher. In contrast to the heat treatment, the M s and M f points of the cryogenic treatment coating decreased. The microhardness of the three coatings is as follows: cryogenic treatment > original coatings > heat treatment. The cryogenic treatment coating has the highest microhardness due to grain refinement and spinodal decomposition. In addition, the cryogenic treatment coating showed the best wear morphology.
研究领域:
材料科学
·
表面工程
·
金属涂层
·
相变
·
激光加工
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jinghong Pan,Chuxiao Sun,Jiajun Liu,Xishan Zhao,Chunxiao Jiao,Chengkai Wang,Qi Wang
Si-based materials are the most potential high-capacity anode material for lithium-ion batteries due to their theoretical specific capacity of 4200 mAh g −1 , significantly higher than the current commercial graphite anode (372 mAh g −1 ). However, the significant volume change (>300%) of Si-based materials during the embedding of lithium ions into Si NPs results in various issues, such as short cycle life and low electrical conductivity , which significantly restricts their commercial development. This study introduces a new flower-like Si@NiO/reduced graphene oxide (rGO) ternary composite synthesized using a straightforward and low-pollution one-step synthesis technique. A distinctive composite flower-like structure is created by wrapping Si NPs in NiO nanoflowers and embedding the rGO nanosheets in the NiO "petal" structure. This structure can shorten the lithium-ion transport path, provide a superb conductive network, effectively reduce the electrode's bulk effect and improve the structural stability of the anode material. Additionally, the structure provides more capacity for the electrodes. At a current density of 1 A g −1 and after 700 cycles, the Si@NiO/rGO anode displays a discharge-specific capacity of 1081.34 mAh g −1 thanks to its one-of-a-kind flower-like structure. At various current densities, the Si@NiO/rGO anode likewise demonstrates outstanding electrochemical performance. Additionally, the volume growth of the flower-like Si@NiO/rGO anode material after 700 cycles is approximately 15.08%, substantially less than that of Si NPs. The new flower-shaped Si@NiO/ rGO ternary composite, synthesized in a simple and cost-effective way, offers not only an alternative for the preparation of Si-based electrode materials that can alleviate their drastic volume expansion but also an effort to create new renewable green energy storage devices.
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产品关联
DOI
高影响因子
APPLIED ENERGY
·
2023
·
IF 11.2
X.C. Han,H.J. Xu,W.S. Hua
MgO/Mg(OH) 2 is a potential thermochemical material with high heat density and stable characteristics. Four additives including Carbons, Carbides, Nitrides and Titanates were selected for modification. The decomposition behavior and kinetics analysis were both investigated. It is found that Titanates has a catalytic effect, and the tested energy storage density can be increased to 971 J/g. The spectral absorption of candidate material with 6% graphite can reach to more than 50% and 6% CaTiO 3 has an extremely high absorption in the short wave segment. In microscopic morphology, Mg(OH) 2 particles sintered at high temperature will form adhesion agglomeration. Due to the special microstructures of candidate materials, agglomeration phenomenon is effectively alleviated and the candidate materials with 6% graphite or CaTiO 3 are both ideal modified materials. The optimized mechanism of modified material with 6% CaTiO 3 was illustrated by model. To investigate the kinetics mechanism, the model of non-isothermal decomposition was developed. The activation energies of pure material, sample with 6%graphite and sample with 6%CaTiO 3 are 141 kJ/kg, 113 kJ/kg and 122 kJ/kg respectively. The shape factor polynomials and kinetic governing equations were obtained. According to the established kinetics equations, the heating processes at 8 K, 12 K and 25 K/min were predicted. The study can provide a necessary kinetics reference for the numerical calculation of thermochemical heat storage.
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产品关联
DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 11
·期 6
·2202383
·
IF 9
Ziyang Wang,Xinyuan Zhang,Jianbo Wu,Lishan Liang,Xinyi Niu,Qin Chen,Ruiqing Li,Junhua Luo
Organic–inorganic hybrid MAPbCl 3 perovskite (MA + = CH 3 NH 3 + ) in UV photodetection is drawing interest due to its superior semiconductor properties and UV-matchable optical bandgap. However, MAPbCl 3 -based photodetector targeting high-performance polarized light detection has remained unexplored due to the isotropic structure of MAPbCl 3 . The photovoltaic effect in the heterojunction, which shows an angle dependence on light polarization, provides opportunities to break the restriction of intrinsic structure for realizing polarization-sensitive photodetection. Herein, an effective strategy is reported to realize high-performance polarization-sensitive UV photodetection by constructing a heterojunction with two isotropic materials MAPbCl 3 and Silicon (Si). Emphatically, the photovoltage in MAPbCl 3 /Si heterojunction changes with the angle of polarized light with the maximum (minimum) value of 0.15 V (0.05 V), originating from the built-in electric field. More interestingly, driven by the photovoltage, the device thus exhibits a large polarization ratio ( I max / I min ) of 2.9 at 377 nm under the self-driven mode. Besides, the present device also delivers high-performance photodetection in UV region owing to the superior photoresponse of MAPbCl 3 , including a high detectivity ( D* ) of 2.93 × 10 11 Jones, a superior responsibility of 8 mA W –1 , a substantial switching ratio of 900, and an ultrafast response speed of 40/98 µs at 0 V bias. This work opens a new avenue for high-performance polarization-sensitive photodetection by utilizing angle-dependent photovoltage effect.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）