Modified Carbide-Derived Carbon As Electrode Applications for Energy Storage System

Carboneous materials have attracted great interest and are used as negative electrodes for lithium ion batteries due to more advantageous than lithium metal negative electrodes in terms of cycle performance by easy mobility of Li ion and safety. Recently, there has been a considerable demand for the development of long-life lithium secondary batteries for energy storage systems. In order to increase energy density lithium alloys with Sn and Si are mainly studied as negative electrode, which exhibit three times of that of the graphite. However, these metal negative electrodes suffer significant mechanical disintegration due to the drastic volumetric changes during lithium insertion and extraction. Carbide-derived carbons (CDCs) possess tunable pore structures and narrow pore size distributions in the 0.5-2 nm range that can be formed through selective etching of crystalline metal carbides. CDC can be modified by activation and high temperature vacuum process before and after CDC, which affords high specific areas, large pore volumes, and diverse structural changes. In this study, we introduce modified carbide-derived carbon (CDC) with tunable pore size, uniform pore structure and structural changes, as electrodes for energy storage devices.