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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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Effect of entropy change of lithium intercalation in cathodes and anodes on Li-ion battery thermal management
Jun 30 , 2021
Vilayanur V. Viswanathan∗, Daiwon Choi, Donghai Wang11, Wu Xu, Silas Towne, Ralph E. Williford, Ji-Guang Zhang, Jun Liu, Zhenguo Yang 3. Experiment 3.1. Electrode synthesis Nanosized LiFePO4 was synthesized using LiCoOCH3•2H2O(reagent grade, Sigma), FeCO2•2H2O (99%, Aldrich), (NH4)H2PO4(99.999%, Sigma–Aldrich), oleic acid (FCC, FG) and paraffin wax(ASTM D 87, mp. 53–57◦C, Aldrich). (NH4)H2PO4 was ...
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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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Effects of the Mixing of an Active Material and a Conductive Additive on the Electric Double Layer Capacitor Performance in Organic Electrolyte
Jun 25 , 2021
2. Experimental Procedure Activated carbon(MSP-20) for an active electrode material was provided from Kansai Coke & Chemicals Co.. Super-P(M.M.M. Carbon Co., Belgium) and polyvinylidene fluoride(Sigma-Aldrich) were employed as a conductive additive and a binder, respectively. The preparation procedure for a coin-type EDLC cell was briefly presented in Fig. 1. Active materia...
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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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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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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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