A Study to Explore the Suitability of LiNi0.8Co0.15Al0.05O2/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 LiNi0.8Co0.15Al0.05O2 (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.

Exploring the Influence of Temperature on Anode Degradation in Cycling-Aged Commercial Cylindrical Graphite-Si|NCA Cells

“…The semiquantitative method has been proven to be useful to identify variation in the electrolyte composition after electrochemical cycling. 29 The chromatogram depicted in Fig. 7, shows 4 peaks.…”

Bio-synthesized TiO2 nanoparticles and the aqueous binder-based anode derived thereof for lithium-ion cells

“…A typical LIB is composed of a cathode, anode, electrolyte, and separator. Current commercial LIBs employ LiCoO 2 (LCO), LiMn 2 O 4 (LMO), LiFePO 4 (LFP), LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC 111), or LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC 811) as cathode materials, and graphite or carbonaceous materials as anode materials [ 8 – 14 ]. Among the various components, anode materials play a pivotal role in determining the electrochemical performance of LIBs.…”

Surface Modification on Nickel Rich Cathode Materials for Lithium‐Ion Cells: A Mini Review

“…[10][11][12][13][14] Due to the high technological maturity, LiCoO 2 (LCO), Li-[Ni x Co y Al 1À xÀ y ]O 2 (NCA) and LiFePO 4 (LFP) have been regarded as the materials of choice at the positive electrode side of lithium-ion cells. [15][16][17][18] However, the discharge capacity of LCO and NCA-based cathodes must be restricted to ensure structural stability. As the best alternative for these cathode materials, LiNi x Co y Mn z O 2 (abbreviated as NCM, where x + y + z = 1) received significant attention owing to the superior specific capacity, better energy density and high reversibility (Figure 1).…”

“…Hence, intensive research has been carried out to develop alternative cathode materials or modify the available ones [10–14] . Due to the high technological maturity, LiCoO 2 (LCO), Li[Ni x Co y Al 1−x−y ]O 2 (NCA) and LiFePO 4 (LFP) have been regarded as the materials of choice at the positive electrode side of lithium‐ion cells [15–18] . However, the discharge capacity of LCO and NCA‐based cathodes must be restricted to ensure structural stability.…”