Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Mark Gerrit Roelofs"'
Autor:
Darin L. Peterson, Mark Gerrit Roelofs, L. Andrew Wray, Ruimin Qiao, Dean T. Deibler, Wanli Yang, Kostantinos Kourtakis, James P. Duff, Jun Liu
The mixed transition-metal layered compound, LiNi0.5Mn0.3Co0.2O2 (NMC532), is a promising high-energy cathode material. However, the required high-voltage (>4.3 V) cycling is accompanied by a rapid capacity fade associated with a complex redox mechan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b525ececc79482d21c145c4f55e69b0f
https://escholarship.org/uc/item/9818959w
https://escholarship.org/uc/item/9818959w
Autor:
David J. Wesolowski, Gregory Rybka, Mark Fedkin, Mark Gerrit Roelofs, Serguei Lvov, Elena Chalkova
Publikováno v:
ECS Transactions. 3:73-82
Our approach for elevating the operational temperature of PEM fuel cells above 100 oC is to use inorganic particles inside a composite membrane. Inorganic components tend to enhance water retention at elevated temperatures and can reduce undesirable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8470159c18783b7f139f94b9c0007a5
https://doi.org/10.1149/1.2356125
https://doi.org/10.1149/1.2356125
Publikováno v:
Journal of Applied Physics. 76:4999-5006
Segmented optical waveguides were fabricated in KTiOPO4 by Rb/Ba ion exchange. The waveguides were characterized by measuring, as a function of input optical wavelength, the Bragg‐reflected power, and the intensity of second harmonic (SH) radiation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::adb0c4e80c65a7349a916b621dabefa4
https://doi.org/10.1063/1.357211
https://doi.org/10.1063/1.357211
This program addressed a two-pronged goal for developing fuel cell components: lowering of precious metal content in membrane electrode assemblies (MEAs), thereby reducing the fuel cell cost, and creating MEAs that can operate at 120oC and 25% RH whe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::292cf99b27f7ec4dca7788327d16af5b
https://doi.org/10.2172/901566
https://doi.org/10.2172/901566
Publikováno v:
SPIE Proceedings.
A correlation is observed between the laser and electric-field damage susceptibilities of most KTiOPO4 (KTP) crystals. The observed gray track damage susceptibilities are found to be correlated to the concentrations of defects in the crystals which c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dadb53a8effe24b65db8d9ed60858a62
https://doi.org/10.1117/12.147398
https://doi.org/10.1117/12.147398
Publikováno v:
MRS Proceedings. 271
In this paper we describe a novel route for the formation of thin films of potassium titanyl phosphate (KTiOPO4 KTP) via a sol-gel route. The ability to form films of high optical quality depends upon the precursor chemistry developed. Formation of s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70833f7831887aa1534e593a5e0ed56b
https://doi.org/10.1557/proc-271-389
https://doi.org/10.1557/proc-271-389
Publikováno v:
SPIE Proceedings.
The ionic conductivity and damage susceptibilities of KTP crystals are related to the defects present in the crystals, which result from the conditions of growth by the flux, high, and low temperature hydrothermal techniques. The effects of Ba impuri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdd5526d635f88211396cc0289f1702b
https://doi.org/10.1117/12.50757
https://doi.org/10.1117/12.50757
Publikováno v:
SPIE Proceedings.
KTP is a unique nonlinear optical material that is widely used for second harmonic generation of Nd:YAG. It also has high electrooptic coefficients and low dielectric constants that together with its high optical damage thresholds and high thermal st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::780b238b4d32486696bf6c9a143b2aa3
https://doi.org/10.1117/12.960124
https://doi.org/10.1117/12.960124
Autor:
Patricia A. Morris, G. Gashurov, Mark Gerrit Roelofs, John D. Bierlein, G. M. Loiacono, M. K. Crawford, P. K. Gallagher
Publikováno v:
MRS Proceedings. 172
Evidence supporting the temperature dependent defect mechanism of nonstoichiometry on the potassium and oxygen sublattices in KTP is presented. The primary compensating defects for the formation of vacant potassium sites in typical flux grown KTP are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99b3d546e6f4b2d74b1ef47f805bfa89
https://doi.org/10.1557/proc-172-283
https://doi.org/10.1557/proc-172-283
Publikováno v:
MRS Proceedings. 172
We report infrared (IR) measurements of protons (H+), present as OH−, in KTiOPO4 grown by various techniques. The IR spectra are sensitive to the growth technique used. In high temperature hydrothermally grown crystals we observe IR bands which hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51e60d8f698a2dbf2e875cef59420729
https://doi.org/10.1557/proc-172-341
https://doi.org/10.1557/proc-172-341