SiO$_x$-Rich Electrode Directly Optimized Using Key Formulation Parameters - ST2E
Article Dans Une Revue Journal of The Electrochemical Society Année : 2024

SiO$_x$-Rich Electrode Directly Optimized Using Key Formulation Parameters

Résumé

The use of key parameters of the SiO$_x$/graphite electrode formulation, and their critical values, makes it possible, without any trial-and-error type experimentation, to identify optimal electrode formulations for different SiO$_x$/graphite mass ratios ranging up to 40:60. From the first attempt, electrodes presenting good cyclability at high surface capacity of 5.2 mA h cm$^{−2}$ were formulated, reaching for example more than 93% capacity retention after 60 cycles in a full cell, with an electrolyte rich in FEC and EC-free, however with a prelithiation strategy. With a positive electrode based on NMC 811 , the gains in volumetric energy and power density are + 18 and + 28% compared to graphite, considering only the electrode volumes. The principle of using the key electrode formulation parameters introduced here is expected to accelerate and facilitate the optimization of electrode formulations.

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Dates et versions

hal-04655473 , version 1 (23-08-2024)

Identifiants

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Clément Meyssonnier, Cassandre Chalard, Amina Merabet, Nicolas Goubard-Bretesché, Nicolas Dupré, et al.. SiO$_x$-Rich Electrode Directly Optimized Using Key Formulation Parameters. Journal of The Electrochemical Society, 2024, 171 (7), pp.070501. ⟨10.1149/1945-7111/ad5a41⟩. ⟨hal-04655473⟩
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