ELECTROCHEMICAL UTILIZATION OF AN EXCESS LITHIUM SULFIDE IN SOLID LITHIUM-ION ELECTRODES
DOI:
https://doi.org/10.53555/ephijse.v7i4.208Keywords:
Solid state batteries, Lithium-ion batteries, electrochemical utilization, composite electrodes, n-LiTiS2Abstract
Solid state lithium-ion batteries with most commonly available electrodes suffer from poor ionic conductivity of the active material and its poor inter particle contact with the solid glass-ceramic electrolyte. While this can be addressed by interlacing the active material like n-LiTiS2 with glass-ceramic binary solid-state electrolyte like Li2S-P2S5, this often reduces the loading of active material in the composite electrode, and thus a reduction in specific capacity of the cell. This article explores the concept of electrochemical utilization of excess Li2S in the electrode by cycling the cell at high temperatures, and thus activating the Li2S and creation of parallel S/ Li2S conversion chemistry along with TiS2/LiTiS2 chemistry and thus increasing the specific energy density of the solid-state batteries without changing the active material loading in the composite electrode.
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