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1.
Stress generation and fracture in lithium insertion materials 总被引:1,自引:0,他引:1
A mathematical model that calculates volume expansion and contraction and concentration and stress profiles during lithium
insertion into and extraction from a spherical particle of electrode material has been developed. The maximum stress in the
particle has been determined as a function of dimensionless current, which includes the charge rate, particle size, and diffusion
coefficient. The effects of pressure-driven diffusion and nonideal interactions between the lithium and host material have
also been described. The model predicts that carbonaceous particles will fracture in high-power applications such as hybrid-electric
vehicle batteries.
相似文献
John ChristensenEmail: |
2.
Yan Gao Sabrina Reischmann Johannes Huber Tobias Hanke Rudolf Bratschitsch Alfred Leitenstorfer Stefan Mecking 《Colloid and polymer science》2008,286(11):1329-1334
Single semiconductor quantum dots were embedded into polymer particles with diameters below 0.1 μm by an emulsion polymerization
procedure or via a secondary dispersion approach. The photoluminescence properties of the nanocrystals are retained upon encapsulation,
as demonstrated by fluorescence confocal microscopy.
相似文献
Stefan MeckingEmail: |
3.
Michael Thompson 《Accreditation and quality assurance》2008,13(8):479-482
The currently recommended design of collaborative trials (interlaboratory method performance studies) is examined in relation
to the usefulness of the resulting statistics. It is suggested that larger experiments, without duplicate analysis, would
be more informative.
相似文献
Michael ThompsonEmail: |
4.
Klaus Ruthenberg 《Foundations of Chemistry》2009,11(2):79-91
Immanuel Kant has built up a dualistic epistemology that seems to fit to the peculiarities of chemistry quite well. Friedrich
Paneth used Kant’s concept and characterised simple and basic substances which refer to the empirical and to the transcendental
world, respectively. This paper takes account of the Kantian influences in Paneth’s philosophy of chemistry, and discusses
pertinent topics, like observables, atomism and realism.
相似文献
Klaus RuthenbergEmail: |
5.
Hinne Hettema 《Foundations of Chemistry》2008,10(2):135-142
Michael Weisberg’s recent 2007 paper on the chemical bond makes the claim that the chemical notion of the covalent bond is
in trouble. This note casts doubts on that claim.
相似文献
Hinne HettemaEmail: |
6.
Saad Alshehri John Burgess Colin D. Hubbard Christopher J. Jones Amit K. Das 《Transition Metal Chemistry》2008,33(4):417-420
The kinetics of substitution by alcohols and by aniline at [tris(3,5-dimethylpyrazolyl)hydroborato]molybdenum nitrosyl dihalides in toluene solution at 298.2 K and at atmospheric pressure
are reported and interpreted in terms of an associative mechanism.
相似文献
Colin D. HubbardEmail: |
7.
Guy Yardeni Israel Zilbermann Eric Maimon Haim Cohen Dan Meyerstein 《Research on Chemical Intermediates》2009,35(4):543-554
A new CeIII complex was synthesized by mixing the ligand “dioxocyclam” with CeIII ions at pH 8.0 and its redox properties were investigated.
相似文献
Dan Meyerstein (Corresponding author)Email: |
8.
H. P. Zhang L. C. Yang L. J. Fu Q. Cao D. L. Sun Y. P. Wu R. Holze 《Journal of Solid State Electrochemistry》2009,13(10):1521-1527
Recent progress in studies of several types of core-shell structured electrode materials, including TiO2/C, Si/C, Si/SiO
x
, LiCoO2/C, and LiFePO4/C nanocomposites, including details of their preparation and their electrochemical performance is briefly reviewed. Results
clearly show that the coating shell can effectively prevent the aggregation of the nanosized cores, which are the electrochemically
active materials. In addition, the diffusion coefficients of lithium ions can be increased, and the reversibility of lithium
intercalation and deintercalation is improved. As a result, the cycling behavior is greatly improved. The reviewed results
suggest that core-shell nanocomposites are a good starting point for further development of new promising electrode materials.
相似文献
Y. P. WuEmail: |
R. Holze (Corresponding author)Email: |
9.
Niki Baccile Anna Fischer Beatriz Julián-López David Grosso Clément Sanchez 《Journal of Sol-Gel Science and Technology》2008,47(2):119-123
Core-shell and homogeneous distributions of functionalized cerium oxide nanoparticles within spray-dried mesostructured silica
spheres are achieved by modification of synthesis parameters such as the templating agent and nanoparticle capping functions.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.
相似文献
Clément Sanchez (Corresponding author)Email: |
10.
René Dybkaer 《Accreditation and quality assurance》2007,12(12):661-663
Terminology within a small laboratory community can be informal without danger of misunderstanding, but communication with
a wider audience and not least in publications, needs unequivocal terms for defined concepts. As an example, the many meanings
of “concentration” are explored to present a systematic nomenclature, including a concept diagram.
相似文献
René Dybkaer |
11.
Nataliya V. Roznyatovskaya Veronika K. Laurinavichute Galina A. Tsirlina Vladimir M. Mirsky 《Journal of Solid State Electrochemistry》2007,11(7):981-992
Various systems containing immobilized binuclear copper(II) and nickel(II) complexes with Robson type ligand ([M2L]Cl2) are studied and compared in relation to catalysis of hydrogen peroxide reduction. Molecular complexes adsorbed on mercury
and gold, crystalline complexes immobilized in the carbon paste electrode, and complex species entrapped into polyphenol-modified
gold electrodes are considered. Electrocatalysis is assumed to result from the formation of H2O2–[M2L]Cl2 adduct, not from mediating redox transformations. Possible geometry of the formed reaction layers supporting adduct formation
is discussed.
相似文献
Nataliya V. RoznyatovskayaEmail: |
12.
13.
Electrochemical copolymerization of furan and 3-chlorothiophene was performed at constant electrode potential in a binary
solvent system consisting of boron trifluoride diethyl etherate + ethyl ether (BFEE + EE; ratio 1:2) and trifluoroacetic acid
(10% by volume). The homopolymers and copolymers obtained were studied with cyclic voltammetry, in situ ultraviolet–visible
spectroscopy, in situ resonance Raman spectroscopy, and in situ conductivity measurements. The spectroelectrochemical properties
of the copolymers show intermediate features between polyfuran and poly(3-chlorothiophene). The conductivity changes of homo-
and copolymer films are almost completely reversible when the potential shift direction is reversed.
相似文献
Rudolf HolzeEmail: |
14.
Vaporization enthalpies for the isomeric diazines were discussed within the context of recent measurements and estimation
techniques. It is suggested that pyridazine shows enigmatic behavior.
相似文献
Joel F. Liebman (Corresponding author)Email: |
15.
Rainer Feistel 《Accreditation and quality assurance》2008,13(10):593-599
The SCOR/IAPSO Working Group 127 was founded in 2005 and charged with the development of a new, comprehensive, highly accurate,
and consistent standard formulation of seawater thermodynamics for oceanography. This task was approached in cooperation with
the International Association for the Properties of Water and Steam (IAPWS) for a joint standard with industrial applications.
In addition to the available standard for fluid water, IAPWS-95, new formulations for ice, IAPWS-06, and the thermodynamics
of seawater, IAPWS-08, have been developed, supplemented by a redefinition of salinity, the Reference-Composition Salinity
Scale 2008. In this paper the starting situation is described, the requirements to be met during the development process are
studied, and the properties of the final formulations are briefly characterized.
相似文献
Rainer FeistelEmail: |
16.
The estimation of electrochemical quartz crystal microbalance (EQCM) frequencies from a given cyclic voltammetric data is analysed using underpotential deposition (UPD) of metals as an illustrative process. The crucial role played by the surface roughness of electrodes and electrosorption valency of the depositing species is pointed out. The computed EQCM frequency shifts for the UPD of Cd and Tl on polycrystalline Ag electrodes are in satisfactory agreement with the experimental data.
相似文献
M. V. SangaranarayananEmail: |
17.
The molecular geometries, relative stabilities, binding energies, and dissociation energies of NaDyBr4 and its molecular ion are discussed. Both the bidentate and tridentate isomers are stable for the neutral species, while
only the bidentate form is stable for NaDyBr4
+.
相似文献
Magdolna Hargittai (Corresponding author)Email: |
18.
Pavel A. Zagrebin Galina A. Tsirlina Renat R. Nazmutdinov Oleg A. Petrii Michael Probst 《Journal of Solid State Electrochemistry》2006,10(3):157-167
The advantages of corrected Marcus plots as compared to the more traditional corrected Tafel plots are discussed and illustrated
by the treatment of experimental data. The procedures are proposed to avoid the uncertainties of EDL correction and to estimate
the reliable values of transmission coefficient and total reorganization energy. Special emphasis is placed on the diagnostics
of activationless reactions in frames of the same method.
Dedicated to Professor M.A. Vorotyntsev on the occasion of his 60th birhtday.
相似文献
Galina A. TsirlinaEmail: |
19.
Hitoshi Shirase Yurie Miura Yutaka Fukuda 《Monatshefte für Chemie / Chemical Monthly》2009,140(7):807-814
Abstract Mixed-ligand NiII complexes have been synthesized with 1,3-diketonate and bulky tri- or tetra-amine ligands. Their structures were determined
by X-ray crystallography, and solvatochromic behavior was examined by UV–vis–NIR spectroscopy. Steric effects of the bulky
ligands on the coordination distances and spectral properties are discussed.
Graphical Abstract
相似文献
Yutaka FukudaEmail: |
20.
This paper describes the COMAR database for certified reference materials (CRMs). The Web-based version of COMAR is freely
accessible via the Internet. COMAR was established to assist laboratories in finding the CRMs needed. The database is maintained
in a collaboration of the world’s major CRM producers. The planned changes in the database as agreed at the last COMAR council
meeting in Prague in May 2006 are indicated.
相似文献
Thomas SteigerEmail: |