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electrophoretically deposited binder-free 3-D carbon/sulfur nanocomposite cathode for high-performance Li–S batteries

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Journal of Energy Chemistry 2020年第9期29卷 92-101,I0003页

作者： Sasan Ghashghaie Samson Ho-Sum Cheng Jie Fang Hafiz Khurram Shahzad Robin Lok-Wang Ma Chi-Yuen Chung Department of Materials Science and Engineering City University of Hong KongHong KongChina Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyHong KongChina

In the present study,the electrophoretic deposition method was successfully applied as a binder-free and scalable approach to deposit carbonaceous nanomaterials on carbon fiber paper(CFP)for cathode applications in Li-S *** microstructural studies of the EPD-CNT film using scanning electron microscopy(SEM)revealed the formation of a crack-free and porous layer of CNTs being uniformly distributed on the CFP *** EPD:CFP/CNT/S cathode delivered a capacity around 2.2 times higher than that obtained in the absence of the EPD-CNT film(CFP/S cell)after 50 cycles and a capacity of935 mAh g^-1 after 100 cycles at 0.1 *** EPD method was then employed to fabricate layer-by-layer structures where the EPD-CNT film was decorated with carbon black *** initial capacity as well as the reversible capacity after 100 cycles was further increased by the EPD:CFP/CNT/KB/S layer-by-layer structure to 1473 and 1033 mAh g^-1,respectively,indicating effective suppression of the shuttle *** addition,the rate performance of CFP/S was improved by depositing the EPD-CNT and EPD-CNT/carbon black architectures on CFP surface,and even further enhanced through the co-deposition of CNT and Pt nanoparticles by EPD,delivering a specific capacity of around 730 mAh g^-1 at 1 ***,the cathodes fabricated by EPD were observed to outperform those made by the conventional casting method in terms of cycling performance,internal resistance,and *** difference was ascribed to the non-uniform microstructure of the Cast-CNT film,which resulted in poor interfacial connection between the CNT agglomerates,hindering uniform sulfide/sulfur deposition during *** obtained results suggested that the binder-free C/S nanocomposite cathode made by EPD is key to further enhance the specific capacity and energy density of Li-S batteries.

关键词： electrophoretic deposition Lithium-sulfur batteries Carbon nanotubes C/S nanocomposite

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Highly conductive,stretchable,durable,skin-conformal dry electrodes based on thermoplastic elastomer-embedded 3D porous graphene for multifunctional wearable bioelectronics

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Nano Research 2023年第5期16卷 7627-7637页

作者： Shipeng Zhang MdSharifuzzamn SM Sohel Rana MdAbu Zahed Sudeep Sharma Youngdo Shin Hyesoo Song Jae Yeong Park Department of Electronic Engineering Kwangwoon University447-1 Wolgye-dongNowon-guSeoul 01897Republic of Korea

Long-term bioelectric potential recording requires highly reliable wearable dry ***-induced graphene(LIG)dry electrodes on polyimide(PI)films are difficult to conform to the skin due to the non-stretchability and low flexibility of PI *** a result,high interface impedance and motion artifacts can occur during body *** LIG to flexible substrates such as polydimethylsiloxane(PDMS)and Ecoflex allows for stretchability and ***,the transfer process produces a significant loss of conductivity destroying the structural function and electron conduction properties of the *** found robust physical and chemical bonding effects between LIG and styrene-ethylene-butylene-styrene(SEBS)thermoplastic elastomer substrates and proposed a simple and robust low-conductivity loss transfer *** embedded LIG onto SEBS to obtain high stretchability,high flexibility,low conductivity *** deposition(EPD)of poly(3,4-ethylenedioxythiophene):polystyrenesulfonic acid(PEDOT:PSS)on LIG forms an ultrathin polymer conductive *** deposition thickness of the conductive polymer is adjusted by controlling the EPD deposition time to achieve optimal conductivity and chemical ***/LIG/PEDOT:PSS(SLPP)dry electrodes have high conductivity(114Ω/Sq),stretchability(300%)and reliability(30%stretch,15,000 cycles),low electrode-skin impedance(14.39 kΩ,10 Hz).The detected biopotential signal has a high signal-to-noise ratio(SNR)of 35.78 ***,the feasibility of SLPP dry electrodes for long-term biopotential monitoring and biopotential-based human-machine interface control of household appliances was verified.

关键词： graphene-embedded elastomers low conductivity loss process highly flexible and stretchable electrophoretic deposition electroencephalography-electrocardiography-electromyography(EEG-ECG-EMG)monitoring

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Effects of Al and Ni doping on oxidation and corrosion resistance of electrophoretic deposited YSZ coatings

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Transactions of Nonferrous Metals Society of China 2017年第7期27卷 1551-1557页

作者： Li-li WANG Wei WANG Ye-li FAN Xiao-xiao QI Ji-hua LIU Zi-ying ZHANG School of Materials Engineering Shanghai University of Engineering Science Shanghai 201620 China

Yttria-stablized zirconia(YSZ)/(Ni,Al)coatings were deposited on Inconel600alloy substrate by the electrophoreticdeposition combined with vacuum sintering *** effects of isothermal oxidation at1100°C on the composition of thecoatings and the crack healing were investigated,and the corrosion resistance of the coatings in3.5%NaCl(mass fraction)solutionwas also *** results showed that the cracks on the coating gradually healed up with the increase of the isothermal *** isothermal oxidation process,the coating composed of Ni3Al was transformed toα-***α-Al2O3particulates can seal the defects such as pores and cracks,and meanwhile prevent the oxygen diffusion into the *** curves and EIS results indicated that the coatings oxidized for40h had a more positive corrosion potential,higherbreakdown potential,higher impedance module at low frequency and much lower corrosion current density compared with YSZcoated and uncoated Inconel600alloys.

关键词： electrophoretic deposition corrosion composite coating superalloy

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Preparation and characterization of TiO_2/acrylic resin composite coatings on sintered NdFeB permanent magnets by electrochemical deposition

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Rare Metals 2014年第6期33卷 703-708页

作者： Zhen-Chen Zhong Ji-Lin Xu Zheng-Xian Huang Jun-Ming Luo School of Materials Science and Engineering Nanchang Hangkong University

The sintered Nd Fe B permanent magnets are widely used in various industries because of their excellent magnetic and comprehensive properties. However, they are seriously hindered to further developments and applications owing to its poor corrosion resistance. In this paper,TiO2/acrylic resin composite coatings were successfully prepared on the sintered Nd Fe B permanent magnets by electrochemical deposition for the first time, and the corrosion behaviors were investigated by using immersion testing and potentiodynamic polarization tests. It is found that the coating is a composite, being composed of polymerized acrylic resin as the matrix and nano-rutile TiO2particles（-200 nm） as the reinforcements. It is about25 lm in thickness and its surface and cross-section exhibit uniform and smooth with no pores, cracks, and other defects. Compared with those of the uncoated Nd Fe B magnets, the weight loss of the coated samples immersed in H2SO4 solution reduces by two orders of magnitude,corrosion current density decreases by four orders of magnitude, and the corrosion potential of the coated sample is shifted in the noble direction by 400 m V. The mechanisms of corrosive resistance enhancement were discussed.

关键词： NdFeB magnets Nano-TiO2 Acrylic resin electrophoretic deposition Corrosion resistance

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Effect of metal nanoparticle doping concentration on surface morphology and field emission properties of nano-diamond films

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Chinese Physics B 2021年第6期30卷 617-624页

作者： Yao Wang Sheng-Wang Yu Yan-Peng Xue Hong-Jun Hei Yan-Xia Wu Yan-Yan Shen Institute of New Carbon Materials Taiyuan University of TechnologyTaiyuan 030024China National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China

Nano-diamond particles are co-deposited on Ti substrates with metal(Ti/Ni) nanoparticles(NPs) by the electrophoretic deposition(EPD) method combined with a furnace annealing at 800℃ under N_(2) atmosphere. Modifications of structural and electron field emission(EFE) properties of the metal-doped films are investigated with different metal NPs concentrations. Our results show that the surface characteristics and EFE performances of the samples are first enhanced and then reduced with metal NPs concentration increasing. Both the Ti-doped and Ni-doped nano-diamond composite films exhibit optimal EFE and microstructural performances when the doping quantity is 5 mg. Remarkably enhanced EFE properties with a low turn-on field of 1.38 V/μm and a high current density of 1.32 mA/cm^(2) at an applied field of 2.94 V/μm are achieved for Ni-doped nano-diamond films, and are superior to those for Ti-doped ones. The enhancement of the EFE properties for the Ti-doped films results from the formation of the TiC-network after annealing. However, the doping of electron-rich Ni NPs and formation of high conductive graphitic phase are considered to be the factor, which results in marvelous EFE properties for these Ni-doped nano-diamond films.

关键词： diamond films metal doping electrophoretic deposition field emission properties

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Production of "Tricalcium Phosphate/Titanium Dioxide" Coating Surface on Titanium Substrates

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Journal of Materials Science & Technology 2010年第11期26卷 1006-1010页

作者： Onder Albayrak Sabri Altintas Department of Mechanical Engineering Mersin University Department of Mechanical Engineering Bogazici University

A new method for the production of the coating surface consisting of tricalcium phosphate （TCP） and titanium dioxide （TiO2） on titanium （Ti） substrates by using electrophoretic deposition （EPD） method has been *** occurrence on coating surface and hydroxyapatite （HA） decomposition into TCP,which are commonly encountered in EPD method,were used as an advantage in this *** nano-powders synthesized by acid-base method were used as the coating *** were deposited on Ti substrates with different voltages and *** on the deposited surface were observed by scanning electron microscopy （SEM）.Samples were sintered in air atmosphere to allow TiO2 growth from the Ti substrate to fill the *** observation and X-ray diffraction （XRD） analysis proved the occurrence of complete decomposition of HA into TCP,TiO2 growth between cracks,and coalescence of TCP/TiO2 on coating *** type of coating surface is expected to increase the coating strength because of TiO2 growth in the cracks and its coalescence with TCP.

关键词： electrophoretic deposition Hydroxyapatite Bioceramics Microstructure

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Fabrication of Porous Nanocrystalline NiCo_2O_4 Electrode for Water Electrolysis

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稀有金属材料与工程 2006年第A03期35卷 646-647页

作者： Jun Yang Xiaozhan Yang Jianbao Li Hong Lin Ning Wang Chunfu Lin Gangfeng Guo State Key Lab of New Ceramics ＆ Fine Processing Department of Materials Science ＆ Engineering Tsinghua University Beijing 100084 China

A porous nanocrystalline NiCo_2O_4 compound electrode was *** morphology of the electrode was controlled by altering the concentration of precipitant (NaOH solution).The electrode was consisted of metal substrate (Ni) and porous nanocrystalline NiCo_2O_4 film which was stacked by homosized and pretty regular hexagonal nanoparticles,with thinner than 50 nm and about 200 nm in *** electrode exhibits good electrochemical properties compared with Ni electrode.

关键词： electrophoretic deposition nanocrystalline NiCo2O4 porous water electrolysis

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Biomechanical Evaluation of Nano-Zirconia Coatings on Ti-6Al-7Nb Implant Screws in Rabbit Tibias

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Current Medical Science 2018年第3期38卷 530-537页

作者： Thekra I. Hamad Abdalbseet A Fatalla Amer Subhi Waheed Zena G. M. Azzawi Ying-guang CAO Ke SONG Department of Prosthodontics College of Dentistry University of Baghdad Baghdad 1417 Iraq MSc Ministry of Health Baghdad 1417 Iraq Department of Prosthodontics and lmplantology Tongjj Medical Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

The clinical success of dental implants can be improved by achieving optimum implant properties, such as their biomechanical and surface characteristics. Nano-structured coatings can play an important role in improving the implant surface. The purpose of the present study was to determine the most appropriate conditions for electrophoretic deposition （EPD） of nano-zirconia coatings on Ti-6A1-7Nb substrates and to evaluate the structural and biomechanical characteristics of these deposited coatings on the dental implants. EPD was used with different applied voltages and time periods to obtain a uniform layer of nano-zirconia on Ti-6A1-7Nb samples. The coated samples were weighed and the thickness of the product layer was measured. Surface analysis was performed by using optical microscopical examination, scanning electron microscope and X-ray diffraction phase analysis. For in vivo examination, 48 screw-designed implants （24 uncoated and 24 nano-zirconia coated） were implanted in both tibiae of 12 white New Zealand rabbits and evaluated biomechanically after 4- and 12-week healing intervals. Results revealed that the use of different conditions for EPD affected the final coating film properties. Increasing the applied voltage and coating time period increased the deposited nano-zirconia film thickness and weight. By selecting the appropriate coating conditions, and analyzing scanning electron microscopical examination and XRD patterns, this technique could produce a thin and continuous nano-zirconia layer with a uniform thickness of the Ti-6A1-7Nb samples. Mechanically, the nano-zirconia-coated implants showed a highly statistically significant difference in removal torque values, while histologically these coated implants enhanced and promoted osseointegration after 4 and 12 weeks of healing, compared with the uncoated ones. In conclusion, EPD is an effective technique for providing a high quality nano-zirconia coating film on dental implant surfaces. Moreover, the

关键词： dental implants electrophoretic deposition nano-zirconia surface characterization

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Recent advances on electrochemical methods in fabricating two-dimensional organic-ligand-containing frameworks

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SmartMat 2021年第3期2卷 299-325页

作者： Xiang Wang Pengfei She Qichun Zhang Department of Materials Science and Engineering City University of Hong KongHong KongChina Center of Super-Diamond and Advanced Films(COSDAF) City University of Hong KongHong KongChina

Organic-ligand-containing frameworks have drawn considerable attention due to their multifunctional properties as well as tunable structures for broad *** numerous synthesis methods developed in the past two decades,electrochemical processing has been demonstrated as one of the most efficient,safe,and facile ways to realize the large-scale and highly controllable production of organic-ligand-containing *** this review,the progress of electrochemically induced crystallization and thin film fabrication of organic-ligand-containing frameworks is summarized in a well-rounded ***,the mechanism and processing parameters are also ***,the main challenges are also expounded for providing some guidance on the future development of organic-ligand-containing frameworks,especially for covalent-organic frameworks and hydrogen-bonded organic frameworks.

关键词： covalent organic frameworks electrophoretic deposition electrosynthesis films hydrogen-bonded organic frameworks metal-organic frameworks

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Graphene oxide modified membrane for alleviated ammonia crossover and improved electricity generation in thermally regenerative batteries

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Chinese Chemical Letters 2023年第2期34卷 485-488页

作者： Yongsheng Zhang Yu Shi Liang Zhang Jun Li Qian Fu Xun Zhu Qiang Liao Key Laboratory of Low-grade Energy Utilization Technologies and Systems Chongqing UniversityMinistry of EducationChongqing 400030China Institute of Engineering Thermophysics School of Energy and Power EngineeringChongqing UniversityChongqing 400030China

Thermally regenerative batteries(TRBs) are promising for harvesting low-grade waste heat into electrical power. However, the ammonia crossover from anode to cathode causes self-discharge and then leads to the decay of capacity. To alleviate the ammonia crossover and improve electricity generation, a stable graphene oxide(GO) modified anion exchange membrane(AEM) was proposed. Compared with the original AEM, the GO modified AEM with a 39.5% lower ammonia permeability induces a 24.3% higher maximal power output and 20.2% higher energy density in TRBs. Together with the visualization result,it was demonstrated the ammonia crossover was effectively alleviated by GO modifying the AEM not at a cost of the reduced battery performance, indicating the promising application in future TRBs.

关键词： Thermally regenerative batteries Ammonia crossover Surface modification Graphene oxide electrophoretic deposition

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