检索结果-南通市图书馆

Balancing the corrosion resistance and through-plane electrical conductivity of Cr coating via oxygen plasma treatment

引用

Journal of Materials Science & Technology 2021年第2期61卷 75-84页

作者： Xian-Zong Wang Hong-Qiang Fan Triratna Muneshwar Ken Cadien Jing-Li Luo State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi'an 710072.China Department of Chemical and Materials Engineering University of AlbertaEdmonton.T6G 1H9Canada Laboratory for Microstructures Institute of MaterialsSchool of Materials Science and Engineering.Shanghai UniversityShanghai 200072China

Developing an electrically conductive and corrosion-resistant coating is essential for metal bipolar plates of polymer electrolyte membrane fuel cells(PEMFCs). Although enhanced corrosion resistance was seen for Cr coated stainless steel(Cr/SS) bipolar plates, they experience a quick decrease of through-plane electrical conductivity due to the formation of a porous and low-conductive corrosion product layer at the plate surface, thus leading to an increase in interfacial contact resistance(ICR). To tackle this issue, the multilayer Cr coatings were deposited using the magnetron sputtering with a remote inductively coupled oxygen plasma(O-ICP) in the present study. After the O-ICP treatment, a Cr oxide layer(Cr O*) is formed on the specimen surface. The Cr O*/Cr/SS has a remarkably lower stable corrosion rate(iss) than that of the native Cr oxides(Cr On/Cr/SS). Compared with Cr On/Cr/SS, the excellent performance of Cr O*/Cr/SS is attributed to a denser and thicker surface layer of Cr O* with Cr being oxidized to its highest valence state,Cr(VI). More importantly, the through-plane electrical conductivity of the specimens treated by the optimized O-ICP decreases much slowly than Cr On/Cr/SS and thus, the increament of ICR of Cr O*/Cr/SS after the potentiostatic polarization test is considerably smaller than that of Cr On/Cr/SS, which is benefited from the reduced issthat mitigates the deposition of corrosion products and hinders further oxidation of Cr coating. Therefore, Cr O*/Cr/SS proves to be a well balanced trade-off between corrosion resistance and through-plane electrical conductivity. The results of this study demonstrate that O-ICP treatment on a conductive metal coating is an effective strategy to improve the corrosion resistance and suppress the increase of ICR over the long-term polarization. The technique reported herein exhibits its promising potential application in preparing corrosion resistant and electrically conductive coatings on metal bipolar pla

关键词： Metal bipolar plates oxygen plasma treatment Chromium coating Corrosion resistance Electrical conductivity Polymer electrolyte membrane fuel cells

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of oxygen plasma treatment on the nanofiltration performance of reduced graphene oxide/cellulose nanofiber composite membranes

引用

Green Chemical Engineering 2021年第1期2卷 122-131页

作者： Shabin Mohammed Hanaa MHegab Ranwen Ou Shasha Liu Hongyu Ma Xiaofang Chen Tam Sridhar Huanting Wang Department of Chemical Engineering Monash UniversityVIC3800Australia College of the Environment&Ecology Xiamen UniversityXiamenFujian361005China

Graphene based nanosheets have been widely used as building blocks for fabrication of superior separation membrane for water *** particular,membranes made of reduced graphene oxide(rGO)show better stability compared with graphene oxide(GO).However,densely stacked of rGO often results in low water *** this study,cellulose nanofibers(CNFs)were incorporated into the rGO laminates by vacuum filtration of dilute GO/CNF solution and thermal reduction at 150C for 1.5 *** resulting rGO/CNF membrane was treated with oxygen plasma for 1–4 min to create nanopores on the membrane surface for the purpose of enhancing nano-filtration *** results showed that the optimum membrane performance was obtained by using the equal amount of GO(31.83 mg m^(-2))and CNFs accompanied by 3 min of plasma treatment,exhibiting a pure water permeance of 37.23.9 L m^(-2)h^(-1)bar^(-1)maintaining a rejection above 90%for Acid Fuchsin(1.2×1.1 nm),Rose Bengal(1.5×1.2 nm)and Brilliant Blue(2.2×1.7 nm).

关键词： Graphene oxide Membrane Nanofiltration Cellulose nanofibers oxygen plasma treatment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advanced Flexible Carbon‑Based Current Collector for Zinc Storage

引用

Advanced Fiber Materials 2022年第6期4卷 1500-1510页

作者： Hao Jia Minghui Qiu Chunxia Tang Hongqi Liu Jinlin Xu Benjamin Tawiah Shou‑xiang Jiang Xiangwu Zhang Key Laboratory of Eco‑Textiles Ministry of EducationJiangnan UniversityWuxiJiangsuPeople’s Republic of China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Department of Industrial Art(Textiles) Kwame Nkrumah University of Science and TechnologyKumasiGhana Fiber and Polymer Science Program Department of Textile EngineeringChemistry and ScienceWilson College of TextilesNorth Carolina State UniversityRaleighNC 27695‑8301USA

Carbon cloth(CC)-based electrodes have attracted extensive attention for next-generation wearable energy-storage devices due to their excellent electrical conductivity and mechanical ***,the application of conventional CC-based electrodes for zinc(Zn)storage severely hinders Zn ion transport and induces deleterious Zn dendrite growth,resulting in poor electrochemical ***,a novel oxygen plasma-treated carbon cloth(OPCC)is rationally designed as a current collector for flexible hybrid Zn ion supercapacitors(ZISs).The modified interface of OPCC with abundant oxygenated groups enables enhanced electrolyte wettability and uniform superficial electric field distribution.A prolonged working lifespan for Zn electrodeposition is achieved by the OPCC due to the improved interfacial kinetics and homogenized ion *** as-prepared hybrid ZIS also delivers excellent cycling endurance(98.5%capacity retention for 1500 cycles)with outstanding operation stability under various extreme *** facile surface modification strategy provides a new way for developing future flexible electrodes for wearable electronic products.

关键词： Zinc ion supercapacitor Carbon cloth oxygen plasma treatment Interface kinetics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

SURFACE REARRANGEMENTS OF oxygen plasma TREATED POLYSTYRENE:SURFACE DYNAMICS AND HUMIDITY EFFECT

引用

Chinese Journal of Polymer Science 2005年第2期23卷 187-196页

作者： JunweiLi KyunghuiOh HyukYu DepartmentofChemistry LehighUniversityBethlehemPA18015USA AgencyforTechnology＆Standards KwacheonRepublicofKorea DepartmentofChemistry UniversityofWisconsin-MadisonMadisonWisconsin53706USA

The time evolution of oxygen plasma treated polystyrene(PS)surfaces was investigated upon storing them in theair under controlled humidity *** methods of water contact angle,X-ray photoelectron spectroscopy(XPS),sumfrequency generation(SFG)vibrational spectroscopy,and atomic force microscopy(AFM)were used to infer the surfaceproperties and *** groups containing oxygen were formed on the PS surface with the plasma treatment,demonstrated by water contact angle and *** surface polarity decayed markedly on time,as assessed by steady increasein the water contact angle as a function of storage time,from zero to around 60°.The observed decay is interpreted as arisingfrom surface rearrangement processes to burying polar groups away from the uppermost layer of the surfaces,which is incontact with *** the other hand,XPS results show that the chemical composition in the first 3 nm surface layer isunaffected by the surface aging,and the depth profile of oxygen is essentially the same with time.A possible change of PSsurface roughness was examined by AFM,and it showed that the increase of water contact angle during surface aging couldnot be attributed to surface ***,it is concluded that surface aging is attributable to surface reorganization andthe motion of oxygen containing groups is confined within the XPS probing *** spectroscopy,which is intrinsicallyinterface-specific,was used to detect the chemical structure of PS surface at the molecular level after various aging times.The results are interpreted as *** the aging of the plasma treated PS surfaces,the oxygen containing groupsundergo reorientation processes toward the polymer bulk and/or parallel to the surface,while the CH_2 moiety stands up onthe PS *** results indicate that the surface configuration chang

关键词： Surface aging Surface rearrangement oxygen plasma treatment Spin-cast polystyrene film Aging of surface functionalized film Contact angle recovery.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A high performance InAIN/GaN HEMT with low Ron and gate leakage

引用

Journal of Semiconductors 2016年第2期37卷 94-96页

作者：马春雷顾国栋吕元杰 Hebei Semiconductor Research Institute Shijiazhuang 050051China National Key Laboratory of ASIC Shijiazhuang 050051China

InA1N/GaN high-electron mobility transistors （HEMTs） with a gate length of 100 nm and oxygen plasma treatment were fabricated. A Si/Ti/A1/Ni/Au ohmic contact was also used to reduce the contact resistance. DC and RF characteristics of the devices were measured. The fabricated devices show a maximum drain current density of 2.18 A/mm at VGs = 2 V, a low on-resistance （Ron） of 1.49 *** and low gate leakage current. An excellent frequency response was also obtained. The current cut-off frequency （fT） is 81 GHz and the maximum oscillation frequency is 138 GHz, respectively.

关键词： InA1N high-electron-mobility transistor (HEMT) drain current density on resistance gate leakagecurrent oxygen plasma treatment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：