Improving the electrochemical performance of lithium‐ion battery using silica/carbon anode through prelithiation techniques

Abstract

This work focuses on the two most common techniques, including the direct contact method (CM) and the electrochemical method (EM) in the half‐cell applied for the SiO2/C anode. After the prelithiation process, the anodes would be assembled in the coin cells paired with NMC622 cathode. According to electrochemical performance, prelithiation techniques could strengthen the initial discharged capacity and Coulombic efficiency. While the nonprelithiated sample exhibits a poor discharged capacity of 48.43 mAh·g−1 and low Coulombic efficiency of 87.41% in the first cycle, the CM and EM methods illustrated a better battery performance. Specifically, the EM4C exhibited a higher initial discharged capacity and Coulombic efficiency (137.06 mAh·g−1 and 95.82%, respectively) compared to the CM30 (99.08 mAh·g−1 and 93.23%, respectively). As a result, this research hopes to bring some remarkable information to improve full‐cell properties using SiO2/C as an anode material by the prelithiation method.

Porous High-Entropy Oxide Anode Materials for Li-Ion Batteries: Preparation, Characterization, and Applications

“…Although many green and renewable energy sources have been developed, such as wind, water, and solar, most renewable energy sources suffer from discontinuities and regional constraints [2,3]. Therefore, the development of high-performance energy storage devices has become a hot research topic in the new era [4][5][6][7], in which the lithium-ion battery (LIB) is one of the most promising energy storage devices due to the advantages of high energy density, strong cyclic stability, and environmental friendliness.…”

Cu and Ni Co-Doped Porous Si Nanowire Networks as High-Performance Anode Materials for Lithium-Ion Batteries

“…Silicon (Si) has extremely high theoretical mass specific capacity (~4200 mA h g −1 ), low potential (<0.4 V vs. Li + /Li) and is abundant on Earth (the second most abundant element in the Earth's crust) [6], making it the most promising anode material for the next generation of LIBs [7,8]. However, the two main drawbacks during lithiation/delithiation processes are significant volume changes (up to 300-400%) [9][10][11][12] and low intrinsic electrical conductivity (10 −5 to 10 −3 S cm −1 ) [13][14][15], which lead to dramatic structural damage and capacity loss that hinder the practical application of Si-based anodes.…”