دانلود کتاب خارجی - دانلود رایگان کتاب لاتین PDF علمی

تعداد نتایج: 426

Proton Conductors

Solids, Membranes and Gels - Materials and Devices

By Philippe Colomban
Publisher: Cambridge University Press, 1992-09-25
Pages: 618
Language: en
ISBN_10:052138317X
ISBN_13:9780521383172
Subject: Science

Solid State Proton Conductors

Properties and Applications in Fuel Cells

جزئیات و درخواست

By Philippe Knauth, Maria Luisa Di Vona
Publisher: John Wiley & Sons, 2012-01-30
Pages: 426
Language: en
ISBN_13:9780470669372
ISBN_10:0470669373
Subject: Technology & Engineering

Solid-state Proton Conductors

جزئیات و درخواست

1990
Pages: 107
Language: en
OTHER:OCLC:727283629

Solid State Proton Conductors

Properties and Applications in Fuel Cells

جزئیات و درخواست

By Philippe Knauth, Maria Luisa Di Vona
Publisher: John Wiley & Sons, 2012-01-18
Pages: 426
Language: en
ISBN_13:9781119963004
ISBN_10:1119963001
Subject: Technology & Engineering

Novel Solid State Proton-conductors Based on Polymeric Non-oxy Acids. Final Report

$Objectives of this project were to prepare and characterize novel solid state proton-conductors and to evaluate these compounds as fuel cell electrolytes. The thrust was on the synthesis of new proton-conducting ''model'' and ''polymeric'' compounds, based on acid functions of the type (R{sub f}SO2)2NH and (R{sub f}SO2)2CH2 in appropriate fluorinated carbon structures, their physics-chemical characterization (Infra-red, Nuclear Magnetic Resonance, Differential Scanning Calorimetry, and X-ray Diffraction), and is pro. evaluation as candidate fuel cell electrolytes for use at elevated temperatures. This project consisted of four tasks (i) Synthesis of Proton-Conducting Polymer Electrolytes; (ii) Physical and Chemical Characterization of Proton-Conducting Polymer Electrolytes; (iii) Electrochemical Characterization of Proton-Conducting Polymer Electrolytes; and (iv) Evaluation of Proton-Conducting Polymer Electrolytes for Fuel Cells.$

جزئیات و درخواست

1992
Pages: 26
Language: en
OTHER:OCLC:68391118

Solid State Protonic Conductors II for Fuel Cells and Sensors

European Workshop on "Solid State Materials for Low to Mediu...

جزئیات و درخواست

By John B. Goodenough, Johannes Jensen, Michel Kleitz
Publisher: Coronet Books, 1983
Pages: 436
Language: en
OTHER:STANFORD:36105032803541
Subject: Science

High Temperature Proton Conductors for Solid State Fuel Cells

جزئیات و درخواست

By Bin Zhu, Fysiska institutionen (Göteborg)
1993
Pages: 39
Language: en
ISBN_10:9170328196
ISBN_13:9789170328190

SSPC (Solid State Proton Conductors 15 Meeting

جزئیات و درخواست

2012
Language: en
OTHER:OCLC:1065814620

Zirconium Phosphate/ionic Liquid Proton Conductors for High Temperature Fuel Cell Applications

$"High temperature operation (>120 °C) is preferred in proton exchange membrane (PEM) fuel cells. It enhances the electrode kinetics, improves the catalyst tolerance for impurities and allows the use of lower cost fuels such as hydrocarbons. However, high temperature operation is not possible using the conventional Nafion membranes. Their proton conductivity decreases dramatically beyond 90°C. Therefore, this work aimed at developing Nafion-free proton conducting material, based on zirconium phosphates (ZrP) and ionic liquids (IL) to allow a high temperate operation. ZrP/IL proton conducting materials were prepared via the reaction of zirconium oxychloride ZrOCl2 in an aqueous solution with phosphoric acid H3PO4 at room temperature. Seven different ionic liquids, were investigated in this work. The ionic liquid component was added to the ZrOCl2 solution prior to the precipitation reaction with IL contents ranging from 0.4-5% by mass. The modified materials were investigated for their proton conductivity. The results of this work demonstrated that the addition of ionic liquids enhances the proton conductivity of the ZrP material by orders of magnitude. Among all the tested ionic liquids, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-utyl-3-methylimidazolium dicyanamide, and 1-butyl-3-methylimidazolium triflate produced the best results with conductivities of 2.26x10-2, 1.61x10-2 and 1.36x10-2 S cm-1, respectively. The proton conductivity of the unmodified ZrP prepared in this work was equal to 9.24x10-4S cm-1. The modified samples were analyzed by thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and scanning electron microscopy (SEM). Results showed the enhancement of water uptake properties by 40-60%, changes in morphology and changes in structure upon the introduction of the IL component. The modified samples were processed at high temperature (200 °C) under completely anhydrous conditions and showed a high anhydrous proton conductivity on the order of 10-4S cm-1. In conclusion, it appeared that the ionic liquids have formed hydrogen bonds with the ZrP molecules and hence, provided additional pathways for the proton transfer and effective proton hopping sites. The enhanced conductivity of the ZrP/IL materials make them good candidates as solid proton conductors for fuel cells applications. "--Abstract.$

جزئیات و درخواست

By Hanin Mohammed
2017
Pages: 79
Language: en
OTHER:OCLC:1122930022
Subject: Ionic solutions

Water Maintenance-Free Inorganic Proton Conductors for PEM Fuel Cells

جزئیات و درخواست

2001
Pages: 29
Language: en
OTHER:OCLC:946239866

Neutron Scattering Studies of Phosphate Proton Conductors

$Proton ceramic fuel cells operating in the intermediate temperature range of 300-500 °C offer potentially revolutionary advantages over existing fuel cells because expensive noble metal catalysts would not be needed, and in situ reforming of liquid bio-fuels such as ethanol or methanol would be possible.The chief obstacle facing intermediate fuel cells is the lack of a suitable electrolyte in the operating temperature range. A good electrolyte is thermally and chemically stable, inexpensive, environmentally friendly, and has a proton conductivity on the order of 10−2 S cm−1 [Siemens per centimeter] at 400 °C. Acceptor-doped lanthanum orthophosphate is an attractive candidate electrolyte as it meets all of the above requirements except that its proton conductivity is 1-2 orders of magnitude too low. One of the motivations for the research presented here is to understand the microscopic mechanisms of proton transport in phosphate materials in order to suggest future synthetic approaches leading to higher performance materials. Proton transfer in orthophosphates is known to involve both localized and long-range diffusion, but the energetically favored pathways and rate limiting steps of the proton transport are not well understood. We investigated acceptor-doped lanthanum orthophosphate by means of quasi-elastic neutron scattering (QENS), neutron powder diffraction, X-ray diffraction, and electrochemical impedance spectroscopy (EIS). The conductivity of the hydrated sample was determined in the temperature range 500-850 °C by EIS, and showed a clear proton-conductivity signature with activation energy of about 1.0 eV [electron volt]. The QENS experiment revealed a fast dynamical process below 500 °C that EIS did not observe. The fast proton diffusion's activation energy is 0.09 eV in the temperature range from 150 °C to 500 °C. We determined the proton mean jump length, mean residence time, atomic displacement, and self-diffusion coefficient in order to characterize the proton dynamics. This work presents the first QENS investigation of proton dynamics in a rare earth phosphate. This work has also led to the development of a new sample cell environment, allowing QENS measurements to be performed under a humid or dry gas flow. Thus materials can be studied under conditions approximating those inside an operational fuel cell.$

جزئیات و درخواست

By Amal Bajes Al-Wahish
2014
Pages: 137
Language: en
OTHER:OCLC:1329441999
Subject: Condensed matter

Heteropoly Acids for Use as Proton Conductors in High Temperature Proton Conducting Membrane Fuel Cells

جزئیات و درخواست

By Mary Ann Sweikart
2003
Pages: 131
Language: en
OTHER:OCLC:53165545
Subject: Electrolytes

Low and Intermediate Temperature Proton Conductors

Synthesis, Structure and Conductivity

جزئیات و درخواست

2009
Pages: 52
Language: en
OTHER:OCLC:938944365

Solid state protonic conductors ... for fuel cells and sensors

جزئیات و درخواست

By European Workshop on Solid State Materials for Low to Medium Temperature Fuel Cells and Monitors with Special Emphasis on Proton Conductors
1982
Language: en
OTHER:OCLC:636419902

THE STABILITY AND ELECTRICAL PROPERTIES OF HIGH TEMPERATURE PROTON CONDUCTORS.

جزئیات و درخواست

2010
Language: en
OTHER:OCLC:727259905

Proton-Conducting Ceramics

From Fundamentals to Applied Research

جزئیات و درخواست

By Mathieu Marrony
Publisher: CRC Press, 2015-10-09
Pages: 437
Language: en
ISBN_13:9789814613859
ISBN_10:9814613851
Subject: Science

Fundamentals and Applications of Solid-state High Temperature Proton Conductors

جزئیات و درخواست

By Ching-Yuan Hsieh
1993
Language: en
OTHER:OCLC:53649990

Stability of Perovskite Proton Conductors

جزئیات و درخواست

By Sanjeevani V. Bhide
1999
Pages: 168
Language: en
OTHER:OCLC:42414448
Subject: Perovskite

Thin Film Complex Oxide Proton Conductors: Synthesis and Applications

جزئیات و درخواست

By Suhare A. Adam
2016
Language: en
OTHER:OCLC:995631071

Search for New Proton Conductors in Complex Perovskite Oxides

جزئیات و درخواست

By S.M. Habibur Rahman
2007
Pages: 69
Language: en
OTHER:OCLC:938295158

«1 2 3 4 5 6 7 8 9 10 »

سایت دانلود کتاب خارجی

نحوه دانلود و خرید کتاب های خارجی

ابتدا در قسمت جستجوی سایت، کلمه کلیدی مد نظر خود را وارد کنید، سپس فیلتر مد نظر خود را انتخاب کنید که در کدام مشخصه کتاب جستجو انجام شود. پس از انتخاب فیلتر مدنظر خود (نویسنده، ناشر، شناسه ISBN، موضوع و یاهمه قسمت ها دکمه جستجو را بزنید. در نتایج می توانید کتاب خارجی مد نظر خود را انتخاب کنید و سپس درخواست خود را برای خرید کتاب خارجی ثبت کنید.

جستجو و دانلود کتاب لاتین

برای دانلود کتاب های لاتین ابتدا کلمه کلیدی خود را داخل کادر جستجو وارد کنید و سپس زبان مربوطه را انتخاب کنید (انگلیسی، اسپانیایی، فرانسوی، آلمانی و ...) و در نهایت دکمه جستجو را بزنید. از نتایج جستجو کتاب لاتین مد نظر خود را انتخاب کنید و سپس درخواست آن را ثبت کنید. همکاران ما در کمتر چند ساعت درخواست شما را بررسی و قیمت گذاری می کنند.

خرید کتاب از آمازون

چاپ کتاب زبان اصلی

دانلود کتاب از آمازون

خرید کتاب از گوگل بوکز

خرید کتاب زبان اصلی

سایت خرید کتاب زبان اصلی

نحوه ثبت درخواست دانلود کتاب لاتین

پس از جستجو و یافتن کتاب و یا منابع لاتین، روی تصویر کتاب و یا دکمه درخواست کلیک کنید و سپس در صفحه ثبت درخواست، مشخصات کامل درخواست خود را بررسی و ایمیل و شماره تماس خود را وارد کنید. در نهایت همکاران ما هزینه و مدت زمان تهیه کتاب خارجی شما را بررسی و از طریق پیامک و ایمیل به شما اطلاع رسانی خواهند کرد. شما پس از پرداخت وجه روی لینک دانلود کتاب لاتین کلیک کنید و کتاب خود را دانلود و استفاده کنید.

کتاب زبان اصلی J.R.R

دانلود کتاب لاتین

خرید کتاب لاتین

خرید مانگا

خرید کتاب از گوگل بوکز

دانلود رایگان کتاب از گوگل بوکز

دانلود رایگان کتاب از آمازون

دانلود رایگان کتاب از گوگل بوکز

کتاب روانشناسی به انگلیسی

کتاب زبان اصلی

کتاب خارجی

سایت خرید کتاب زبان اصلی