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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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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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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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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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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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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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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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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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Air Dehydration Membranes for Nonaqueous Lithium–Air Batteries
May 28 , 2021
Jian Zhang, Wu Xu,* Xiaohong Li, and Wei Liuz PTFE thin film coated on the porous metal substrate sheet.— In the third stage of our membrane development, the PTFE membranes were coated onto the metal substrates by spin coating with DuPont PTFE TE-3859 fluoropolymer resin. The resin is anegatively charged, hydrophobic colloid containing approximately60% by total weight of 0.05–0.5 m PTFE particles ...
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