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Constructing the bonding between conductive agents and active materials/binders stabilizes silicon anode in Lithium-ion batteries

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Journal of Energy Chemistry 2023年第5期80卷 23-31,I0002页

作者： Jie Tang Jiawang Zhou Xingyu Duan Yujie Yang Xinyi Dai Fuzhong Wu Guizhou High-level Institution Key Laboratory of High-Performance Battery Materials Guizhou UniversityGuiyang 550025GuizhouChina

silicon(si)anode has been considered a promising candidate due to its remarkable theoretical capacity but it was plagued by severe pulverization because of the inherent huge volume variation.Enhancing electrode stability is an effective approach to improve electrochemical performance.Herein,a stable si anode was established by an innovative construction of the bonding between conductive agents and active materials/binders.As a result,the strong interaction of electrode components not only effectively alleviates the volume expansion of si but also achieves a stable interface by generating the beneficial solid electrolyte interphase(SEI)composition.Attributed to the deliberate scheme of the electrode,the si anode exhibits sterling electrochemical performance.Besides,the device of the electrode is not only effective for other binders but also for other anode materials with high volume variation,thus shedding light on the rational design of electrodes for high-energy-density lithium-ion batteries.

关键词： Lithium-ion batteries si MXene SEI Structural stability

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si词头

液晶与显示 2011年第4期26卷 500-500页

作者： si词头

词头名称代表的因素——符号英文中文词头石称代表的因素——符号英文中文

关键词：词头 si 中文英文

Improving open-circuit voltage and short-circuit current of high-efficiency silicon-based planar heterojunction solar cells by combining V_(2)O_(5)with PEDOT:PSS

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Journal of Materiomics 2023年第3期9卷 438-446页

作者： Zhiting Luo Chen Yang Xiuhua Chen Wenhui Ma Shaoyuan Li Kaixin Fu School of Materials and Energy Yunnan UniversityYunnan650500China Yunnan silicon Materials Engineering Technology Research Center Kunming University of Science and Technology650093China National Joint International Research Center for Optoelectronic Energy Materials Yunnan UniversityYunnan650500China

In recent years,a novel PEDOT:PSS/n-si planar heterojunction solar cell has been extensively studied in the photovoltaic field.Different V_(2)O_(5)-IPA concentrations mixed in PEDOT:PSS samples as hole transport layer were prepared by means of spin coating technique and mechanical mixing of organic and inorganic materials.V_(2)O_(5)was studied for its effects on the surface morphology,chemical composition,and optical transmittance of PEDOT:PSS films.The findings of the study show that the addition of V_(2)O_(5)particles changes the surface morphology of PEDOT:PSS films and promotes its superior ohmic contact with the si interface.Furthermore,PEDOT:PSS incorporated with V_(2)O_(5)particles that have outstanding optical and semiconductor properties reduces the rate of carrier recombination at the device interface and blocks electron transport to the anode in the fabricated si-based solar cells.When compared to conventional PEDOT:PSS/si planar heterojunction solar cells,the fill factor,photoelectric conversion efficiency,open-circuit voltage,and short-circuit current density of the devices prepared in this study can be significantly improved,reaching up to 70.98%,15.17%,652 mV and 32.8 mA/cm^(2),respectively.This research provides a promising and effective method for improving the photoelectric conversion performance of PEDOT:PSS/si heterojunction solar cells,which enables the application of V_(2)O_(5)in si solar cells.

关键词： si PEDOT:PSS Heterojunction photovoltaic devices V_(2)O_(5)-IPA High conductivity Semiconductor film

Nb/Mn/si合金化的β-γ钛铝合金循环氧化行为

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Transactions of Nonferrous Metals Society of China 2023年第1期33卷 128-140页

作者：赵鹏翔李小兵邢炜伟陈波马颖澈刘奎中国科学技术大学材料科学与工程学院合肥230026 中国科学院金属研究所师昌绪创新材料研究中心沈阳110016 季华实验室佛山528200 中国科学院金属研究所核用材料与安全评价重点实验室沈阳110014

利用扫描电子显微镜、电子探针、电子背散射衍射和X射线衍射,研究Ti42Al1.5Mn3Nb0.1B合金和Ti42Al1.5Mn3Nb0.1B0.2C0.2si合金在750~850℃下的循环氧化行为。两种合金的氧化增质曲线大致符合抛物线规律,且在800℃的氧化速率常数较Ti42Al5... 详细信息

利用扫描电子显微镜、电子探针、电子背散射衍射和X射线衍射,研究Ti42Al1.5Mn3Nb0.1B合金和Ti42Al1.5Mn3Nb0.1B0.2C0.2si合金在750~850℃下的循环氧化行为。两种合金的氧化增质曲线大致符合抛物线规律,且在800℃的氧化速率常数较Ti42Al5Mn1W合金的降低。在所有的实验温度下,两种合金表面都生成保护性良好的氧化膜,没有开裂或剥落发生。Nb的添加会抑制TiO_(2)的生长,促进Al的选择性氧化,使合金形成致密的Al_(2)O_(3)层。另外,微量si元素的添加进一步提高合金的抗氧化性,使其生成更为致密的Al_(2)O_(3)层,在氧化过程中进一步抑制氧的内扩散,降低合金的氧化增质,且其效果在高温下更加明显。

关键词： β-γ钛铝合金循环氧化显微组织 Mn Nb si 合金化

Exciton polaritons based on planar dielectric si asymmetric nanogratings coupled with J-aggregated dyes film

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Frontiers of Optoelectronics 2020年第1期13卷 4-11页

作者： Zhen CHAI Xiaoyong HU Qihuang GONG State Key Laboratory for Mesoscopic Physics&Department of Physics Collaborative Innovation Center of Quantum MatterBeijing Academy of Quantum Information SciencesNano-optoelectronics Frontier Center of Ministry of EducationPeking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Optical cavity polaritons,originated from strong coupling between the excitons in materials and photons in the confined cavities field,have recently emerged as their applications in the high-speed lowpower polaritons devices,low-threshold lasing and so on.However,the traditional exciton polaritons based on metal plasmonic structures or Fabry-Perot cavities suffer from the disadvantages of large intrinsic losses or hard to integrate and nanofabricate.This greatly limits the applications of exciton poalritons.Thus,here we implement a compact low-loss dielectric photonic–organic nanostructure by placing a 2-nm-thick PVA doped with TDBC film on top of a planar si asymmetric nanogratings to reveal the exciton polaritons modes.We find a distinct anti-crossing dispersion behavior appears with a 117.16 meV Rabi splitting when varying the period of si nanogratings.Polaritons dispersion and mode anti-crossing behaviors are also observed when considering the independence of the height of si,width of si nanowire B,and distance between the two si nanowires in one period.This work offers an opportunity to realize low-loss novel polaritons applications.

关键词： exciton polaritons dielectric si asymmetric nanogratings TDBC J-aggregated dyes film

si-Based Anode Materials for Li-Ion Batteries:A Mini Review

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Nano-Micro Letters 2014年第4期6卷 347-358页

作者： Delong Ma Zhanyi Cao Anming Hu Institute of Laser Engineering Beijing University of Technology 100 Pingle Yuan Key Laboratory of Automobile Materials Ministry of Education and School of Materials Science and Engineering Jilin University Department of Mechanical Aerospace and Biomedical Engineering University of Tennessee

si has been considered as one of the most attractive anode materials for Li-ion batteries(LIBs) because of its high gravimetric and volumetric capacity. Importantly, it is also abundant, cheap, and environmentally benign. In this review, we summarized the recent progress in developments of si anode materials. First, the electrochemical reaction and failure are outlined, and then, we summarized various methods for improving the battery performance, including those of nanostructuring, alloying, forming hierarchic structures, and using suitable binders. We hope that this review can be of benefit to more intensive investigation of si-based anode materials.

关键词： Li-ion batteries Anode si High capacity Nanomaterials

热处理对激光熔覆CoCrFeNisi_(2.0)高熵合金涂层组织与性能的影响

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表面技术 2022年第12期51卷 340-349页

作者：张连旺牛伟孙荣禄左润燕谷米马世忠天津工业大学机械工程学院天津300387 天津市现代机电装备技术重点实验室天津300387

目的探究热处理温度对激光熔覆CoCrFeNisi_(2.0)高熵合金组织、物相、显微硬度及摩擦磨损性能的影响,为研究提高高熵合金性能的工艺流程提供参考。方法采用激光熔覆技术制备了CoCrFeNisi_(2.0)高熵合金,利用高温炉加热方法对制得涂层进... 详细信息

目的探究热处理温度对激光熔覆CoCrFeNisi_(2.0)高熵合金组织、物相、显微硬度及摩擦磨损性能的影响,为研究提高高熵合金性能的工艺流程提供参考。方法采用激光熔覆技术制备了CoCrFeNisi_(2.0)高熵合金,利用高温炉加热方法对制得涂层进行不同温度(热处理温度分别为600、800、1000℃)的热处理,30 min分别升温至600、800、1000℃,保温30 min,后随炉冷却至室温。采用显微硬度仪、真空摩擦磨损试验机、Leica DVM6光学显微镜、扫描电镜(SEM)、X射线衍射仪(XRD)等设备对涂层的显微硬度、摩擦磨损性能、显微组织、物相组成进行分析研究。结果未经热处理原始试样高熵合金涂层物相组成主要为BCC相,同时夹杂少量的(Fe,Mn)2siO4相,经过不同温度的热处理后,(Fe,Mn)2siO4逐渐分解,1000℃热处理后完全消失;Cr_(2)si、Ni_(4)si相析出且在一定温度范围内随热处理温度上升含量逐渐增加,BCC相衍射峰高度随着热处理温度的增加先升高后降低。结论热处理温度不同会影响涂层综合性能的改变,热处理温度为800℃时合金的综合性能优于原始试样涂层,内部组织较为均匀,Cr_(2)si、Ni_(4)si等析出相含量最多且均匀分布在晶界处,涂层显微硬度最高达1347.4HV0.3,摩擦因数基本稳定在0.19。当热处理温度达到1000℃时,CoCrFeNisi_(2.0)高熵合金涂层呈单一的BCC相,这势必会对涂层性能产生一定影响。

关键词：热处理激光熔覆 si 高熵合金显微组织显微硬度耐磨损性能

Interdiffusion in group IV semiconductor material systems:applications,research methods and discoveries

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Science Bulletin 2019年第19期64卷 1436-1455页

作者： Guangrui(Maggie)Xia Department of Materials Engineering the University of British Columbia

Group IV semiconductor alloys and heterostructures such as si Ge,Ge Sn,Ge/si and si Ge:C have been widely used and under extensive research for applications in major microelectronic and photonic devices.In the growth and processing of these materials,nanometer scale interdiffusion is common,which is generally undesirable for device performance.With higher Ge molar fractions and higher compressive strains,si-Ge interdiffusion can be much faster than dopant diffusion.However,si-Ge interdiffusion behaviors have not been well understood until recent years.Much less studies are available for Ge Sn.This review starts with basic properties and the applications of major group IV semiconductors,and then reviews the progress made so far on si-Ge and Ge-Sn interdiffusion behaviors.Theories,experimental methods,design and practical considerations are discussed together with the key findings in this field.

关键词： Group IV semiconductors Interdiffusion Modelling si Ge materials and devices

Synthesis and Spectroscopic Investigations of Four New Y(Ⅲ), Ge(Ⅳ), W(Ⅵ) and si(Ⅳ) Penicillin Antibiotic Drug Complexes

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光谱学与光谱分析 2019年第9期39卷 2982-2988页

作者： Abeer A.El-Habeeb Moamen S.Refat College of Science Princess Nourah Bint Abdulrahman University Department of Chemistry Riyadh 11671 Saudi Arabia Chemistry Department Faculty of Science Taif University P.O. Box 888 Al-Hawiah Taif 21974 Saudi Arabia Department of Chemistry Faculty of Science Port Said Port Said University Egypt

A four new penicillinate complexes were prepared through the chemical interactio ns of penicillin potassium salt (Pin) with YCl 3, GeCl 4, WCl 6 and siCl 4 m etal ions. These metal complexes were characterized using spectroscopic techniqu es (e.g. 1H-NMR, infrared, electronic UV-Vis) as well as elemental, cond uctivity, and magnetic measurements. The molar conductance values were highly, s howing their electrolytic nature. The magnetic and electronic study strongly rec ommends the octahedral geometry of all penicillinate complexes. A monomeric stru ctures of Pin complexes are proposed with octahedral coordinated metals ions. Th e metal ions are coordinated toward Pin as tridentate ligand through the amide a nd β-lactam carbonyls and a carboxylate group from penicillin. The in vitro antimicrobial activity of all the complexes, at concentrations in μg·mL^-1 , was screened against four bacterial pathogens, namely, Bacillus subtilis , Escherichia coli, Pseudomonas aeruginosa , and Staphylococcus aureus , and two kinds of fungi Aspergillus flavus and Candida albicans showed better activi ty compared to parent drug and control drug. The anti-cancer inhibition of the tungsten(Ⅵ) complex was assessed against the human hepato cellular carcinoma (H epG-2) tumor cell line with IC50 value is 646 μg·mL^-1 .

关键词： Penicillin Yttrium Germanium Tungsten si licon FTIR Complexation Biological