Preparation and Characterization of High-Power Anode Materials Using Soft Carbon Precursors for Lithium Ion Battery

Abstract

In order to apply to the high-power anode materials of lithium ion battery, various cokes samples were prepared by milling, pitch coating, and following heat treatment. The samples were milled and the larger particles were removed by sieving. Two types of raw cokes and four pitch coated cokes treated at different temperatures were tested as the anode materials for lithium ion battery, and their electrical performance was compared with the cokes without pitch coating. Although the anode materials prepared with cokes showed lower charge-discharge capacity than the graphite anode materials, their power capability was superior to that of graphite. The electrochemical performance of various anodes with the pitch coated cokes was demonstrated as a function of preparation conditions.

High rate capability of carbonaceous composites as anode electrodes for lithium-ion secondary battery

“…As for cokes, besides that higher capacity than the theoretical capacity of graphite can be obtained, the rapid charge-discharge is also possible due to the fast diffusion of Li-ions caused by the small crystalline size and wide layer distance of cokes [7]. Therefore, the development of carbonaceous anode materials having high capacity, high power, and long lifetime has been studied progressively to investigate the appropriate combination method of crystalline carbon materials and amorphous carbon materials to supplement disadvantages of these two kinds of carbon materials [8,9].…”