3D cathodes for high hydrogen productivity: FeP nanoparticles on carbon felt scaffold exhibit excellent HER activity in both acidic and alkaline electrolytes with overpotentials of only 41 and 63 mV for 10 mA ⋅ cm−2. High curren...
Coulombic Efficiency of Lithium Deposition and Stripping on Lithium Metal: A New Method for Measuring
Von Wiley-VCH zur Verfügung gestellt
Coulombic efficiency of lithium electrode: A new method for accurate determination of the coulombic efficiency of a lithium electrode was proposed. A Li/electrolyte/Li cell with a limited amount electrolyte was cycled at a constant current until cell degradation.
Rechargeable lithium metal batteries (RLMBs) have been extensively investigated as a next-generation battery for electric vehicles because of their two times higher specific energy density than conventional lithium-ion batteries. However, RLMBs have not been commercialized yet, because of the low coulombic efficiency (CE) of the lithium deposition and stripping process and lithium dendrite formation. CEs measured by a conventional method with a Li/electrolyte/Cu were considerably lower than those measured using full cells of Li/electrolyte/oxide cathode. The discrepancy is considered to be due to the non-reversibility of the Cu electrode for the lithium deposition and stripping process. Here, we propose a new method to determine the CE of lithium deposition and stripping on lithium metal from the loss of electrolyte using a Li/electrolyte/Li cell with a limited amount of electrolyte.Zum Volltext
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