CARBON
·
2023
·
IF 10.9
Dong Sui,Min Yao,Linqi Si,Kun Yan,Jingge Shi,Jianshe Wang,Charles Chunbao Xu,Yongsheng Zhang
Silica (SiO 2 ) is regarded as a promising anode for lithium-ion batteries due to the high specific capacity, abundant resources and low cost. However, the inherently poor electrical conductivity and the huge volume variation during charge/discharge process significantly hinder the application of SiO 2 . Designing nanostructured SiO 2 and coating with high conductivity materials are effective methods to solve the above challenges. In this work, advanced SiO 2 anodes were prepared by coating hollow SiO 2 nanotubes (SNTs) with lignin or phenolated and depolymerized lignin furfural resin (PDLF)-derived carbon. The novel structure of the obtained SNTs greatly promotes the rapid transport for both Li + and electron, increases the exposed active sites for Li + insertion and accommodates the volume change of SNTs. Especially, PDLF possesses abundant functional groups, high carbon content and thermosetting property, which are beneficial to the dispersion of SNTs and formation of a cross-linked 3D conductive network. Thereby, SNTs@C-PDLF presents higher specific capacity of 661 mAh g −1 at 100 mA g −1 , superior rate capability (262 mAh g −1 at 3000 mA g −1 ) and better cycling stability (549 mAh g −1 at 1000 mA g −1 after 800 cycles) compared with SNTs@C-lignin and pristine SNTs.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Meihua Zhu,Shiming Huang,Yudan Gong,Yunyan Zhou,Xinyu Chen,Yongsheng Liu,Na Hu,Fei Zhang,Xiangshu Chen,Hidetoshi Kita
Good separation performance NaY zeolite membrane was successfully prepared on the tubular mullite support by fluoride-containing precursor synthesis gel. The fluoride source had a great influence on NaY zeolite membrane growth and separation performance for EtOH/ETBE mixture, the NaF containing precursor gel was benefit for preparing high Si/Al ratio, fine reproduction quality and long-term stable NaY zeolite membrane. Solid state 19 F MAS NMR characterization results indicated that the fluorine existed in the channel of NaY zeolite crystals. Both flux and separation factor of the NaY zeolite membrane were greatly depended on the separation temperature and composition of EtOH/ETBE mixtures. The NaY zeolite membrane presented eminent long-term stability for separating 20 wt% EtOH/ETBE mixture at 60 °C, even if the test time was prolonged to 80 h, the flux and separation factor were kept 1.30 kg m −2 h −1 and 1100.
研究领域:
材料科学
·
膜分离技术
·
化学工程
·
无机非金属材料
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2016
·
IF 2.208
Wenbo Wang,Guangyan Tian,Li Zong,Yanmin Zhou,Yuru Kang,Qin Wang,Aiqin Wang
A series of mesoporous silicate adsorbents with superior adsorption performance for hazardous chlortetracycline (CTC) were sucessfully prepared via a facile one-pot hydrothermal reaction using low-cost illite/smectite (IS) clay, sodium silicate and magnesium sulfate as the starting materials. In this process, IS clay was “teared up” and then “rebuilt” as new porous silicate adsorbent with high specific surface area of 363.52 m 2 /g (about 8.7 folds higher than that of IS clay) and very negative Zeta potential (− 34.5 mV). The inert Si O Si (Mg, Al) bonds in crystal framework of IS were broken to form Si(Al) O − groups with good adsorption activity, which greatly increased the adsorption sites served for holding much CTC molecules. Systematic evaluation on adsorption properties reveals the optimal silicate adsorbent can adsorb 408.81 mg/g of CTC (only 159.7 mg/g for raw IS clay) and remove 99.3% (only 46.5% for raw IS clay) of CTC from 100 mg/L initial solution (pH 3.51; adsorption temperature 30°C; adsorbent dosage, 3 g/L). The adsorption behaviors of CTC onto the adsorbent follows the Langmuir isotherm model, Temkin equation and pseudo second-order kinetic model. The mesopore adsorption, electrostatic attraction and chemical association mainly contribute to the enhanced adsorption properties. As a whole, the high-efficient silicate adsorbent could be candidates to remove CTC from the wastewater with high amounts of CTC.
研究领域:
环境科学
·
材料科学
·
水污染控制
·
吸附技术
·
矿物加工
·
环境功能材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yansong Bai,Xiaoyan Zhang,Hongbo Shu,Zhigao Luo,Hai Hu,Qinglan Zhao,Ying Wang,Xianyou Wang
The poor electronic conductivity of Na2FeSiO4 always limits its electrochemical reactivities and no effective solution has been found to date. Herein, the novel Ni-substituted Na2Fe1–xNixSiO4@C nanospheres (50–100 nm) encapsulated with a 3D hierarchical porous skeleton (named as alveolation-like configuration) constructed using in situ carbon are first synthesized via a facile sol–gel method, and the effects of Ni substitution combined with the design of a unique carbon network on Na-storage properties are assessed systematically, focusing on alleviating the inherent defects of the Na2FeSiO4 cathode material. A series of characterization technologies such as X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and so forth, coupled with the electrochemical measurements and first-principles calculations, are used to explore the structure, morphology and electrochemical behaviors of the as-prepared materials. The results show that the synergism between Ni substitution and the special alveolation-like configuration enables fast Na ions mobility (from 10–14 to 10–12 cm2 s–1), reduces band gap energy (from 2.82 to 1.79 eV) and lowers Na-ion diffusion barriers, finally reciprocating the vigorous electrochemical kinetics of the electrode. Especially, the elaborately designed material—Na2Fe0.97Ni0.03SiO4@C—displays superior Na-storage properties of around 197.51 mA h g–1 (corresponding to 1.43 Na+ intercalation) at 0.1 C within 1.5–4.5 V along with desirable capacity retention (84.44% after 100 cycles), and the rate capability is also markedly enhanced (a capacity of 133.62 mA h g–1 at 2 C). Such the effective methodology employed in this work opens a potential pathway to synthesize the silicate cathode material with excellent electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
固态化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Li Gou,Weifeng Jing,Ying Li,Mei Wang,Shengliang Hu,Huiqi Wang,Yan-Bing He
Silicon (Si) has been ascertained as one of the most desirable anode candidates for sodium-ion batteries (SIBs), ascribed to its sizeable theoretical capacity and abundant resource. However, the inherent electrochemical inertness of crystalline Si against sodium impedes its practical use. Herein, lattice-coupled Si nanoparticles are uniformly distributed onto delaminated MXene (d-MXene) and further tightly confined by hard carbon (HC), consequently forming a 3D cross-linked (Si/d-MXene)@HC architecture as an anode material for SIBs. Coupling a carbon-coated Si anode with a conductive d-MXene matrix through the local lattice overlapping not only vastly enables the alloying reactivity of Si with Na, but also provides fast-transfer portholes for Na+ and electrons because of the capacitive-like behavior of d-MXene, thus increasing the capacity and achieving fast ion conduction. The Si/d-MXene bonded with HC, constructing a robust architecture, can effectively stabilize the whole electrode structure and accommodate the volume expansion of Si upon cycling and increase capacitive-like contributions, resulting in an enhanced capacity and excellent cycle performance as anodes for SIBs. The developed electrode thus harvests favorable electrochemical performance compared to pure Si and d-MXene electrodes, such as high initial discharge capacity (370 mAh g–1), long cycling stability (a capacity retention above 80% after 500 cycles), and superior rate performance. The protocol to enable the sodium storage performance of Si/MXene anodes by adopting the capacitive-battery dual model would inspire rather far-ranging investigations on other advanced battery systems.
研究领域:
材料科学
·
电化学
·
纳米能源
·
储能技术
·
无机非金属材料
·
先进电池系统
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Yuehua Huang,Wangwu Li,Jiao Peng,Zhenyu Wu,Xingxing Li,Xianyou Wang
Silicon (Si) or Si-based compounds have been paid much attention in the field of lithium-ion battery anodes on account of desirable theoretical capacity, moderate working voltage, abundant resources, and bing nontoxic. However, some disadvantages, including inferior electrical conductivity and enormous volume change in the process of lithiation/delithiation, hinder their widespread application in commercial lithium-ion batteries. To solve the above problems, we designed and prepared the graphite/silicon/carbon nanotubes/carbon (GSCC) composites with hierarchical structure. Herein, the graphite can absorb the bulk expansion stress of the Si particles. The carbon layer carbonized by pitch can further mitigate the volume change and physically separate Si and electrolyte, and an admirable conductive network can be provided by the carbon nanotube. As a consequence, the as-prepared GSCC electrode possesses a capacity of 1100.6 mAh g–1 at 0.2 A g–1 and high initial coulomb efficiency (ICE) of 78% and has a good capacity retention of 73%. Therefore, the combinational design of the graphite/silicon/carbon nanotubes/carbon for the preparation of a silicon-based anode material is a meaningful exploration for large-scale production and commercial application in lithium ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Xue Mu,Chuankai Fu,Renlong Li,Chunyu Du,Yunzhi Gao,Geping Yin,Pengjian Zuo
Silicon oxide (SiO x ), consisting of nanosized Si crystallites and oxide matrix (SiO y , y near 2), is regarded as one of the most promising anode materials for next-generation high energy density lithium-ion batteries (LIBs). Commonly, modulating oxygen content and surface chemistry are favorable to the lithium ions storage performances of SiO x anode. Here, an AlCl 3 –MgSO 4 assisted low-temperature (250 °C) etching technique is adopted to modify the commercial micron-sized SiO x anode, this novel modification method tunes the O/Si ratio on the surface of SiO x . Impressively, the modified SiO x anode exhibits a high reversible capacity of 480 mAh g −1 at 1A g −1 after 200 cycles and good rate capability of above 110 mAh g −1 at 10 A g −1 . This work provides a simple and feasible modification strategy to the development of high performance SiO x anode.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 35
·14648-14655
·
IF 3.5
Hong Su,Cong Dou,Fan Dou,Wen Li,Jiachen Li,Xiaolian Chao,Zupei Yang,Xiaoming Wang,Huan Jiao
The efficiency of silicon solar cells is still lower than theoretical values, partly due to their inability to utilize the ultraviolet and infrared portions of the solar spectrum. Herein, a novel method using a KCa2Mg2(VO4)3 phosphor with a down-shift effect to improve the photovoltaic performance of silicon solar cells and enhance the utilization of UV light in standard p-type silicon solar cells is proposed. The synthesized phosphors were mixed with an ethylene vinyl acetate (EVA) copolymer and pressed into a film, which was subsequently encapsulated in monocrystalline silicon solar cells. The results show that the addition of this film notably enhanced the photovoltaic performance of the silicon solar cells; the current density was increased by 2.89% (from 33.20 to 34.16 mA cm−2), and the photovoltaic conversion efficiency was improved by 5.69% (from 15.11% to 15.97%) at the optimal concentration compared to bare cells.
研究领域:
材料科学
·
光伏技术
·
无机功能材料
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 3
·2079-2092
·
IF 2.993
Yang Maiping,Liu Weiqu,Jiang Chi,Liu Chunhua,He Sha,Xie Yankun,Wang Zhengfang
A facile, mild and low-cost approach of the fabrication of self-cleaning cotton textile, which showed excellent superhydrophobic and photocatalytic properties, was proposed. The surface was firstly coated with pure anatase TiO 2 through a sol–gel method catalyzed by glacial acetic acid and then modified by (heptadecafluoro-1,1,2,2-tetrahydrodecyl) triethoxysilane (F-17). The hydrophilic cotton textile turned superhydrophobic with a water contact angle of 160.0°. The wettability, surface morphology and chemical composition of pristine and modified textile were investigated, respectively. Meanwhile, the robustness of chemical solutions, laundering treatment and water pressure of the textile were all verified by exposing to different pH solutions, organic solvents, washing and immersing. Importantly, the textile surface showed outstanding self-cleaning performance toward solid pollutant, daily liquids, oil and even organic contaminant, attributing to the synergetic function of superhydrophobicity and photocatalysis of TiO 2 nanoparticles. Therefore, the self-cleaning textile is an expected material for daily and industrial applications in diverse conditions, even harsh environment.
研究领域:
材料科学
·
纺织工程
·
表面化学
·
纳米科技
·
功能材料
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 32
·6571-6575
·
IF 4.726
Enshuang Zhang,Yuyan Liu,Jianxin Yu,Tong Lv,Li Li
In the current work, a three dimensional porous nickel based (p-Ni/NiO) template processed by a simple electrodeposition method was used to fabricate the hierarchical gecko-inspired microarrays. The microstructure of p-Ni/NiO templates is controlled and optimized by deposition and post-treatment parameters. Bio-inspired polydimethylsiloxane (PDMS) microarrays with different morphologies were fabricated by casting and showed excellent adhesion strength and superhydrophobicity. This feasible method is a simple fabrication approach for the gecko dry adhesive using a reusable template.
研究领域:
材料科学
·
仿生学
·
表面工程
·
纳米技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2014
·
IF 0.74
Guolun Xiahou,Weiqu Liu,Zhenlong Yan,Kui Su,Honglei Wang
Long side chain polyurethane oligomers were synthesized from tolylene diisocyanate (TDI), polyether triol (N330) and monohydroxy terminated polydimethylsiloxane (M-PDMS, ), and the structures were characterized by FT-IR spectrum. Subsequently, they were mixed with polyurethane oligomers synthesized from TDI and polyether triol (N220) to obtain M-PDMS graft modified polyurethanes (M-PDMS-PUs). Dihydroxy terminated polydimethylsiloxane modified polyurethanes (D-PDMS-PUs) were also prepared for the study in contrasts with M-PDMS-PUs. The influence of concentration and length of PDMS on the surface, thermal and mechanical properties was investigated by contact angle measurement, thermo-gravimetric analysis (TGA), different scanning calorimeter (DSC) and mechanical testing. Water contact angles showed the M-PDMS-PUs had higher contact angles than that of D-PDMS-PUs. Added with low amount of PDMS (2.6 wt%), the water contact angle of M-PDMS-PU was 95.5°C while that of D-PDMS-PU was 88.0o. TGA data showed that M-PDMS-PU (Tmax = 368.0°C) had better thermal stability than that of D-PDMS-PU (Tmax = 362.2°C) at low PDMS concentration (2.6 wt%). DSC data revealed that the incorporation of PDMS into PU resulted in a decrease in Tg values and the Tg values of D-PDMS-PUs decreased more drastically than those of M-PDMS-PUs. Mechanical testing indicated that the tensile strength, elongation at break and Shore A hardness of the PDMS modified polyurethanes decreased with the increase of the PDMS content. The morphologies of the fracture surfaces of the copolymers showed that microphase separation between PU and PDMS was formed in both types of PDMS modified polyurethanes and the size of the polysilicone phase became larger with increasing the PDMS content.
研究领域:
高分子化学
·
材料科学
·
表面科学
·
热分析
·
力学性能测试
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bo Wang,Jinyu Wang,Yuan Chen,Zhiyong Xu,Wenbo Zhao
N-Benzyl-N-methyl-1-(methyl diphenyl silyl) methanamine (MPSA) with high thermal stability was synthesized for the absorption of SO 2 in the present work. The absorption capacity was measured at low partial pressures ranging from 0.002 to 0.016 bar and thermodynamic parameters, including enthalpy change (Δ H ) and entropy change (Δ S ) were calculated to analyze the absorption behavior. The desulphurization rates and absorption capacities at different temperatures and partial pressures were simulated based on thermodynamic parameters. An optimal absorption temperature T 1 that maximizes the absorption capacity, and an optimal desorption temperature T 2 that minimizes the desorption residual capacity and thermal desorption energy consumption were defined, and a function was proposed to calculate them. The kinetic behavior of the absorption was described using a pseudo-first-order model, and kinetic data at different temperatures and partial pressures were simulated based on a combination of kinetic and thermodynamic parameters. Ultimately, selectivity and cycles experiment showing MPSA has excellent CO 2 selectivity and thermal regeneration performance.
研究领域:
环境化学
·
气体分离
·
热力学
·
化学工程
·
功能材料
·
大气污染控制
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）