ACS Applied Energy Materials
·
2023
·
IF 6.4
Lei Ma,Xiaomeng Fu,Fangfang Zhao,Liming Yu,Wenda Su,Liangming Wei,Gen Tang,Yue Wang,Fang Wu,Xiang Guo
Silicon (Si) has been gradually explored as a next-generation anode material to replace traditional graphite anodes in lithium-ion batteries (LIBs) due to its high specific capacity (3579 mAh g–1 at room temperature). In terms of cost and tap density, silicon microparticles (SiMPs) are more advantageous than silicon nanoparticles (SiNPs) in high energy density LIBs, but they are also plagued by the more serious volume effect. Here, we design a silicon/carbon (Si/C) composite anode through the in situ polymerization of phenolic resin (PF) onto SiMPs, and after pyrolysis, SiMPs are tightly coated with pyrolytic carbon layers. When applied in LIBs, the composite anodes (μSi@PF) exhibit excellent cycling performance (1283 mAh g–1 after 400 cycles at 2 A g–1) and rate performance (a reversible capacity of about 1000 mAh g–1 at 8 A g–1). The full cell with lithium iron phosphate cathodes and μSi@PF anodes can maintain 87.7% capacity retention after 100 cycles. The great electrochemical performance can be ascribed to the rational structure design of μSi@PF in which PF pyrolytic carbon as a shell around SiMPs can accommodate the volume change of SiMPs during cycling and reduce the internal impedance. This is the first attempt to construct Si/C composites by in situ polymerizing PF resin onto SiMPs, and the great performance of Si/C anode provides a reference for the practical application of SiMPs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Wenyan Chen,Zhen Zhang,Fangchang Zhang,Zhenyao Wei,Pengxian Li,Chaoyang Wang,Meng Gu,Yonghong Deng,Jian Chang
The silicon microparticles (SiMPs) offer a promising solution for high-energy-density lithium-ion battery systems. However, the inevitable volume expansion (>300%) of SiMPs during alloying often leads to particle breakage, interface rupture, and electrode separation, resulting in rapid capacity decay. Herein, an effective strategy is proposed for designing a novel solid–liquid hybrid electrode (Si@EGaSn) for high-energy-density flexible lithium-ion batteries. The Si@EGaSn electrode has a liquid-phase top layer containing SiMPs and a solid-phase copper gallium alloy bottom layer. The top layer can not only electrically connect the fractured SiMPs, but also form a stable solid electrolyte interface during alloying processes. The bottom layer can firmly adhere the electrodes to the current collector. Consequently, the optimal Si@EGaSn electrode delivers a highly reversible capacity of 767.1 mAh g −1 at 0.5 A g −1 and a high capacity retention of >99% during 200 cycles. After loading the electrode into metallic textiles, the assembled high-voltage pouch cell of NCM811//Si@EGaSn shows a high areal capacity of 3.2 mAh cm −2 , high volumetric energy density of 500 Wh L −1 and negligible capacity decay during 3000 flexing cycles at a small bending radius of 4.0 mm. This work provides a new electrode design approach to achieve high-energy-density flexible lithium-ion batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2015
·
IF 3.501
Mehdi Derradji,Noureddine Ramdani,Tong Zhang,Jun Wang,Tian-tian Feng,Hui Wang,Wen-bin Liu
A new type of composite based on phthalonitrile resin reinforced with silicon carbide (SiC) microparticles was prepared. For various weight ratios ranging between 0% and 20%, the effect of the micro-SiC particles on the mechanical and thermal properties has been studied. Results from thermal analysis revealed that the starting decomposition temperature and the residual weight were significantly improved upon adding the reinforcing phase. At the maximum micro-SiC loading, dynamic mechanical analysis (DMA) showed an important enhancement in both the storage modulus and glass transition temperature ( T g ), reaching 3.1 GPa and 338 °C, respectively. The flexural strength and modulus as well as the microhardness were significantly enhanced by adding the microfillers. Tensile test revealed enhancements in the composites toughness upon adding the microparticles. Polarization optical microscope (POM) and scanning electron microscope (SEM) analysis confirmed that mechanical and thermal properties improvements are essentially attributed to the good dispersion and adhesion between the particles and the resin.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Asian Journal of Pharmaceutical Sciences
·
2015
·
IF 0
Jian Li,Xiaoqing Miao,Tongkai Chen,Defang Ouyang,Ying Zheng
With hydrophilic surface and high surface area, porous silica has been applied to load insoluble drugs. Compared to solvent equilibrium method, resveratrol (RES)–mesoporous silica microparticles (MSM) solid dispersion prepared by fluid bed demonstrated higher drug loading and more complete dissolution. Pore volume and diameter have more remarkable effects than surface area to the drug loading and in vitro dissolution profiles. RES–polyethylene glycol solid dispersion with high drug loading showed fast but incomplete dissolution due to the recrystallization. The combination of fluid bed and MSM was an effective strategy to improve drug loading as well as dissolution for poorly water-soluble drugs.
研究领域:
药剂学
·
药物递送系统
✓ 已验证
DOI
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2018
·
IF 5.018
Haochen Liu,Shang Li,Wei Chen,Dan Wang,Chen Li,Dan Wu,Junjie Hao,Ziming Zhou,Xinzhong Wang,Kai Wang
Luminescent solar concentrator (LSC) integrated with c-Si photovoltaic cells (PV cells) in building integrated photovoltaics (BIPV) could grow up to be an important element of our life for energy harvest in the future. Heavy metal free quantum dots (QDs) are promising for LSC applications, which can be controlled to possess effective large Stokes Shift and low reabsorption of emission that benefit their applications in BIPV. In our work, different amount and size of SiO 2 particles were added to CuInS 2 /ZnS QDs based LSCs to realize highly efficient scattering enhanced LSC (S-LSC) devices. Since SiO 2 particles induced scattering effect, we achieved a power conversion efficiencies (PCE) of 4.20%, which showed an improvement of 60.3% compared with the pure QDs based LSC without SiO 2 particles. This study suggests a new method of scattering enhancement to realize better performance for LSC.
研究领域:
材料科学
·
可再生能源
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Weixing Wu,Genmin Zhu,Beifu Wang,Ting Qu,Ming Gao,Yuanlu Zhu,Jiangyi Yan,Guiliang Li,Hailong Zhang,Lihong Nie
With the rapid development of industry, the environmental pollution caused by various oily wastewaters is becoming more and more serious. Therefore, it is urgent to exploit an environmentally friendly, highly efficient, and convenient method to scavenge the residual oil in crude oil/water emulsions. It is found that Janus particles have great potential in the treatment of oily wastewater due to their high interfacial activity. In this study, recyclable Janus hollow silica micron particles (J-HSMPs), were successfully synthesized by the improved Pickering emulsion method. Amphiphilicity of J-HSMPs was characterized and confirmed by using scanning electron microscopy, Fourier transform infrared spectroscopy, zeta-potential and contact angle measurements. The interfacial activity was further investigated by observing the dispersion behavior of J-HSMPs at oil-water interface and measuring the interfacial tension. The experimental results showed that J-HSMPs had excellent oil removal capability and reusability. Separation efficiency of crude oil and diesel oil could obtain 95.31 % and 96.17 %, respectively. After five cycles of application, the oil removal efficiency still could get >90 %. Amphiphilic J-HSMPs could cause tiny oil droplets in the water phase to aggregate into millimeter-sized oil droplets and carry them to the surface of water under influence of buoyancy, which helped to easily separate the water phase and oil droplets wrapped by J-HSMPs using a sieve. We anticipate that the as-prepared J-HSMPs will have promising and broad application prospects in cleaning oil spills, removing oil from domestic oily wastewater and crude oil emulsions in the process of petroleum industry.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Yi-Fu Chen,Jie Li,Yan-Jun Tan,Jie-Hua Cai,Xiao-Hong Tang,Ji-Hong Liu,Ming Wang
Conductive polydimethylsiloxane (PDMS) composites have attracted extensive attention worldwide due to its potential application on wearable electronics and strain sensors. In this work, silicon dioxide micro-particles (μ-SiO 2 ) were added into the flexible PDMS/multi-walled carbon nanotubes (MWCNT) composites to improve their electrical conductivity and piezoresistive sensitivity. First, the μ-SiO 2 particles can exhibit volume exclusion effect to dense MWCNT fillers in PDMS matrix, which leads to the high electrical conductivity and low percolation threshold. Furthermore, the larger μ-SiO 2 particles could give higher electrical conductivity and lower percolation threshold. For examples, the electrical conductivity and percolation threshold of the PDMS/MWCNT composites with 0.3 vol% MWCNT increased from 3.5 × 10 −9 to 2.2 × 10 −4 S/m and decreased from 0.44 to 0.08 vol%, respectively, by the incorporation of 30 vol% 85 μm-SiO 2 particles. Second, the piezoresistive sensitivity of PDMS/MWCNT composites was abruptly enhanced by the addition of μ-SiO 2 particles because of the high modulus of μ-SiO 2 particles, which resulted in the asymmetric deformation in the composites. The deformation of PDMS/MWCNT phase was higher in the PDMS/MWCNT/μ-SiO 2 composites than that of the PDMS/MWCNT composites, which leaded to high piezoresistive sensitivity. For example, the gauge factor (GF) of the PDMS/MWCNT composites increased from 1.3 to 62.9 at 30% compression strain by the addition of 30 vol% 1 μm-SiO 2 particles. The highest piezoresistive sensitivity was found in the PDMS/MWCNT/μ-SiO 2 composites with lowest size of μ-SiO 2 particles due to the highest deformation of PDMS/MWCNT phase.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Peiying Han,Li jun Yang,Zhaofei Zhu,Xuyuan Liang,Wanxin Wu
The coffee-ring effect commonly occurs during the evaporation and deposition of particle-laden droplets on the substrates. The resulting deposition pattern is influenced by internal flows, which depend on substrate properties, droplet chemistry, and external conditions. However, in applications such as inkjet printing, drug formulation, and self-assembly, avoiding coffee ring formation is crucial. This study presents a method to suppress the coffee-ring effect using focused laser irradiation on droplet surfaces. By irradiating droplets containing silica microparticles with a green laser and adjusting the particle concentration, we controlled the deposition patterns. Uniform patterns formed at particle concentrations below 0.02%, while gradient patterns appeared above 0.08%. A dimensionless parameter, G, was introduced to quantify particle deposition patterns. Uniform deposition structures are established when Gmax > 10, whereas gradient structures are formed when Gmax < 2. This approach offers new insights into the laser-induced control of microparticle deposition patterns.
研究领域:
流体力学
·
材料科学
·
光学工程
·
表面科学
·
微流体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2023
·Vol. 13
·期 1
·1-12
·
IF 4.6
Zhang Hailong,Qu Ting,Wang Hairong,Wu Weixing,Lu Fangfang,Ou Jiguang,Zhu Genmin,Gao Liangjun,Cheng Longsheng
Janus nanoparticles have aroused the interest of scholars because of their highly efficient emulsification of spilled oils in wastewater. In this work, interfacially active Janus hollow glass microparticles (J-HGMPs) of asymmetric wettability were designed and synthesized in order to achieve more efficient separation of emulsified oil droplets from oily wastewater. Surface characteristic techniques such as FTIR, SEM, zeta potential and contact angle measurements had been employed to assess the amphiphilic surface properties of J-HGMPs. The oil removal/recovery performance of J-HGMPs in different oil–water systems and their interfacial activities were studied. As a particulate emulsifier, J-HGMPs could remove/recover > 96% oil from oil–water mixed phase. The results showed that J-HGMPs had strong interfacial activities and anchored firmly at oil/water interfaces. This high adsorption energy was also evaluated and verified via the calculation of Gibbs free energy. Overall, this study provided a novel and low-cost oil recovery method via a convenient buoyancy force that could be effectively applied in the treatment of oil spills while achieving the goal of benign and green environmental protection.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Qi Zhong,Qing Sun,Bin Xiang,Peng Mu,Wenting Guo,Jian Li
Underwater superoleophobic membranes are competitive strategy for accomplishing efficient oil-in-water emulsions separation. However, permeating flux of water probably may be dropped with the reduction of pore size. Moreover, the plenty of oil phase may block pore canal resulting the decrease of separation performance. Herein, an underwater superoleophobic membrane with hydrophobic bump and hydrophilic sublayer structure was fabricated through spinning hexadecyltrimethoxysilane (HDTMS) modified SiO 2 (H-SiO 2 ) micro-particles on polydopamine (PDA) hydrophilized polyvinylidene fluoride (PVDF, PDP) membrane. Therefore, the sieving of hydrophilic PDP membrane sublayer and oil absorption-flotation of hydrophobic H-SiO 2 bump are ongoing simultaneously in separation processes, thus effective decreasing oil fouling to break the trade-off effect between separation efficiency and permeation flux. Interestingly, the PDPS membrane not only could efficiently separate diverse emulsions involving low and high-viscosity oil/water emulsions, but also possessed excellent mechanical (200 times of bending test) and chemical (separation of oil-in-corrosive waster emulsions) stabilities. More importantly, the separation performance of PDP-H-SiO 2 (PDPS) membrane with bump-sublayer structure is obviously superior to the single PDP membrane. The idea of rationally combing opposite wetting and bump-sublayer structures has certain significance towards the fabrication and development about oil/water separation materials.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yanling Dong,Hanqing Li,Biao Zhang,Fugui Zhao,Feng Gao,Dong Liu
Microsized silicon (μSi) anodes take advantage of low-cost, high tap density, and high theoretical capacity (∼4200 mAh g–1). However, poor cycle stability is presented because of huge volume change during cycling, which seriously limits their practical application in commercial lithium-ion batteries. Herein, a tough composite network combining high electronic and ionic conductivity is developed to stabilize the operation of the μSi anode. The resultant μSi electrode exhibits a high capacity of 3789.0 mAh g–1 with a high initial Coulombic efficiency (ICE) of 92.2% at 100 mA g–1, high-rate capability (1636.0 mAh g–1 at 3 A g–1), and good cycle stability with a high capacity retention of 92.0% from 1908.7 mAh g–1 at 15th to 1755.9 mAh g–1 at 135th cycle under 2 A g–1. The excellent electrochemical performance is attributed to the high stretchability (560%) of the 3D structure of the composite network, which can preserve the integral electrode structure, providing rapid electronic conductivity and ionic conductivity during cycling and resulting in outstanding electrochemical performance. This work offers a facile strategy for the development of a tough network combining high electronic and ionic conductivity to enhance the electrochemical performance of high-capacity Si anodes and beyond for energy-dense batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2013
·Vol. 40
·期 1
·11-22
·
IF 0.88
Zhi Dongyan,Li Xiangye,Xu Shouhong,Liu Honglai
Microparticles with a core–shell structure were synthesized from SiO 2 particles as core and thermally sensitive hyaluronate–poly( N -isopropylacrylamide) (HA–PNIPAM) hydrogel as shell. The SiO 2 –HA–PNIPAM microparticles were injectable at room temperature and assembled to settle on to biosurfaces. Dynamic light-scattering measurements at different temperatures showed that the temperature-dependence of the diameters ( d ) of SiO 2 –HA–PNIPAM microparticles was reversible. d decreased abruptly when the temperature was increased to their lower critical solution temperature of 307 K. The Mw of HA and the extent of modification by glycidyl methacrylate, D
m , had clear effects on the sizes of the microparticles and their thermal sensitivity. Fluorescein, selected as model drug, was encapsulated in the gel shell to study the dynamics of drug release by this microparticle at body temperature.
研究领域:
生物材料学
·
组织工程
·
药物递送系统
·
纳米医学
·
再生医学
·
高分子科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）