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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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The Influence of Polyvinylidene Fluoride (PVDF) Binder Properties on LiNi0.33Co0.33Mn0.33O2(NMC) Electrodes Made by a Dry-PowderCoating Process
Jun 21 , 2021
To cite this article: Ming Wang et al 2019 J. Electrochem. Soc. 166 A2151 Preparation of electrodes.—A manually operated powder coatingspray gun (Encore LT Manual Powder Coating System, Nordson) was used for the ESD process. One piece of 16μm thick aluminum foil was used as the electrode substrate, one piece of electrically grounded Cuplate (250μm thick) was used as the platform. The operation vol...
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An Approach to Make Macroporous Metal Sheets as Current Collectors for Lithium-Ion Batteries
Jun 23 , 2021
The freestanding, laminated film was sintered in air by increasing the temperature of the furnace at a slow rate to 1000°C, holding at1000°C for 1 h, and then decreasing the temperature at a rate of5°C/min to room temperature. This high temperature treatment was done to completely burn all carbon and organic materials to generate a porous structure and to simultaneously allow CuO particles to conn...
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Monolithic Nanoporous Zn Anode for Rechargeable Alkaline Batteries
Jun 28 , 2021
Congcheng Wang,# Guoyin Zhu,# Pan Liu, and Qing Chen* METHODS Battery Assembly and Testing. Ni−Zn batteries were assembled into coin-type cells (CR2032) with a Zn anode, either the compressed nanoporous Zn (∼0.36 cm2 in size) or a pasted electrode comprising Zn powder (90 wt %, Aldrich), polyvinylidene fluoride (Arkema Kynar), and a NiOOH cathode (650 mAh, GP Batteries). Tin foil was used as the a...
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Reinvestigation on the state-of-the-art nonaqueous carbonate electrolytes for 5 V Li-ion battery applications
Jul 02 , 2021
2. Experimental 2.1. Electrolyte and electrode preparation Battery-grade ethylene carbonate (EC), propylene carbonate(PC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC),diethyl carbonate (DEC), and lithium hexafluorophosphate (LiPF6)were purchased from Novolyte Technologies. Lithium foil (0.75 mmthick) was purchased from Alfa Aesar. All chemicals and materials were used as received. Elect...
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