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A Study to Explore the Suitability of LiNi_0.8Co_0.15Al_0.05O₂/Silicon@Graphite Cells for High-Power Lithium-Ion Batteries.

ABSTRACT: Silicon-graphite (Si@G) anodes are receiving increasing attention because the incorporation of Si enables lithium-ion batteries to reach higher energy density. However, Si suffers from structure rupture due to huge volume changes (ca. 300%). The main challenge for silicon-based anodes is improving their long-term cyclabilities and enabling their charge at fast rates. In this work, we investigate the performance of Si@G composite anode, containing 30 wt.% Si, coupled with a LiNi_0.8Co_0.15Al_0.05O₂ (NCA) cathode in a pouch cell configuration. To the best of our knowledge, this is the first report on an NCA/Si@G pouch cell cycled at the 5C rate that delivers specific capacity values of 87 mAh g^-1. Several techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and gas chromatography-mass spectrometry (GC-MS) are used to elucidate whether the electrodes and electrolyte suffer irreversible damage when a high C-rate cycling regime is applied, revealing that, in this case, electrode and electrolyte degradation is negligible.

SUBMITTER: Cabello M

PROVIDER: S-EPMC8509030 | biostudies-literature |

REPOSITORIES: biostudies-literature

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