Effect of Porosity in Activated Carbon Supports for Silicon-Based Lithium-Ion Batteries (LIBs)

Abstract

Activated carbon supports for Si deposition with different porosities were prepared, and the effect of porosity on the electrochemical characteristics was investigated. The porosity of the support is a key parameter affecting the Si deposition mechanism and the stability of the electrode. In the Si deposition mechanism, as the porosity of activated carbon increases, the effect of particle size reduction due to the uniform dispersion of Si was confirmed. This implies that the porosity of activated carbon can affect the rate performance. However, excessively high porosity reduced the contact area between Si and activated carbon, resulting in poor electrode stability. Therefore, controlling the porosity of activated carbon is essential to improving the electrochemical characteristics.

Enhancing the Conductivity and Dielectric Characteristics of Bismuth Oxyiodide via Activated Carbon Doping

“…Activated carbon (AcC) has extraordinary unique characteristics and excellent surface properties, including pore size, structure, surface area, and chemical and thermal stability [3,4]. These factors made AcC a plausible candidate for gas separation, water treatment, electrode material, supercapacitors, and lithium-ion batteries [5,6]. Moreover, the electrochemical performance of carbon-based electrocatalysts is mostly determined by the characteristics of the carbon support, particularly its electrical conductivity [7].…”