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On the use of LiPF3(CF2CF3)3 (LiFAP) solutions for Li-ion batteries. Electrochemical and thermal studies
May 26 , 2021
J.S. Gnanaraja, E. Zinigrada, L. Asrafa, M. Sprechera, H.E. Gottlieba,W. Geissler b, M. Schmidtb, D. Aurbacha,* aDepartment of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel b Merck KGaA, D-64293 Darmstadt, Germany Received 4 August 2003; received in revised form 27 August 2003; accepted 27 August 2003 Published online: 2 October 2003 In the ARC tests, two milliliters of solution was plac...
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Optimization of Nonaqueous Electrolytes for Primary Lithium/Air Batteries Operated in Ambient Environment
May 31 , 2021
Wu Xu,*,z Jie Xiao,** Jian Zhang, Deyu Wang,** and Ji-Guang Zhang* Pacific Northwest National Laboratory, Energy and Environment Directorate, Richland, Washington 99354,USA Li/air coin cell assembly (xiamen Tmaxcn Inc.)— The air electrode sheet was die cut into circular disks with a small piece of Ni tab. The air electrode disks had a diameter of 1.59 cm and an area of 1.98 cm2. 2325 coin cell kit...
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Improving the high-temperature performance of LiMn2O4 spinel electrodes by coating the active mass with MgO via asonochemical method
Jun 02 , 2021
J.S. Gnanaraj, V.G. Pol, A. Gedanken, D. Aurbach * Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel Received 6 August 2003; accepted 19 August 2003 Published online: 30 September 2003 2. Experimental For surface analysis studies, we used a Magna 860(Nicolet) FTIR spectrometer placed in a vacuum glove box (xiamen Tmaxcn Inc) under H2O and CO2-free atmosphere (fed by compr...
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Solvent-Free Dry Powder Coating Process for Low-Cost Manufacturing of LiNi1/3Mn1/3Co1/3O2 Cathodes in Lithium-Ion Batteries
Jun 04 , 2021
Mohanad Al-Shroofy,aQinglin Zhang,aJiagang Xu,aTao Chen,aAman Preet Kaur,band Yang-Tse Chenga 2. Experimental 2.1 Electrode Fabrication 2.1.1 Dry-Powder-Coated Electrodes.To prepare the dry cathode mixture, NMC (Umicore) was mixed with carbon black (CB, Super P C65, TIMCAL) in a planetary mixer-deaerator (Mazerustar KK-50S, Kurabo) for 20 min. The NMC particle size is between 5.6 µm and 12 µm (D50...
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Reaction mechanisms for the limited reversibility of Li–O2 chemistry in organic carbonate electrolytes
Jun 07 , 2021
Wu Xua,∗, Kang Xub, Vilayanur V. Viswanathana, Silas A. Townea, John S. Hardya, Jie Xiaoa, Zimin Niea,Dehong Huc, Deyu Wanga,1, Ji-Guang Zhanga,∗∗ a Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA 99354, United States b Sensors and Electron Devices Directorate, U.S. Army Research Laboratory, Adelphi, MD 20783, United States c Fundamental and Computational Sc...
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Properties and Performance Attributes of Novel Co-extruded Polyolefi n Battery Separator Materials
Jun 09 , 2021
Richard S. Baldwin Glenn Research Center, Cleveland, Ohio Impedance Measurement Cell Fabrication A modified 2325 coin cell configuration was employed as the cell fixture for conductivity and impedance (i.e., electrical resistance) measurements of electrolyte-wetted separator samples over the desired temperature range. This test configuration was selected as it provides a constant and reproducible ...
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Temperature-Dependent Solubility of Solid Electrolyte Interphase on Silicon Electrodes
Jun 11 , 2021
Construction of Si Anode Half Cell. Experimental Method. Si wafer samples with native SiOx surface layer were used in this study. All of the silicon electrodes (1 cm × 1 cm squares) were cleaned with an established multi step cleaning protocol to remove surface contamination.33 Silicon wafers (Czochralski process, boron-doped to 0.001−0.005 Ω cm, (100) orientation, 700 μm thick, purchased from Add...
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Effect of Conducting Salts in Ionic Liquid based Electrolytes: Viscosity, Conductivity, and Li-Ion Cell Studies
Jun 16 , 2021
Andreas Hofmann1,*, Michael Schulz1, Thomas Hanemann1,2 2. EXPERIMENTAL N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl)azanide (DMMA-TFSA, IoLiTec, >99%), lithium bis(trifluoromethanesulfonyl)azanide (LiTFSA, IoLiTec, > 99%), and propylene carbonate (PC, Sigma-Aldrich, anhydrous, 99.7%) were dried at 110°C by means of a continuous flow of dried air. The water co...
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Synthesis, characterization, and evaluation of unsupported porous NiS submicrometer spheres as a cathode material for lithium batteries
Jun 18 , 2021
Debajyoti Mondal•Gilles Villemure•Chaojie Song 2.2 Synthesis of porous NiS submicrospheres The USP procedure for the synthesis of nanomaterials wasreported elsewhere [54]. A solution containingNiCl26H2O, Na2S2O35H2O, and colloidal silica was prepared according to a procedure reported in our previouspaper [55]. The solution was loaded to a USP ultrasonic cell, after which the system was purged with...
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