Preparation of Advanced Carbon Anode Materials from Mesocarbon Microbeads for Use in High C-Rate Lithium Ion Batteries

Abstract

Mesophase soft carbon (MSC) and mesophase graphite (SMG), for use in comparative studies of high C-rate Lithium Ion Battery (LIB) anodes, were made by heating mesocarbon microbeads (MCMB) at 1300 °C and 3000 °C; respectively. The crystalline structures and morphologies of the MSC, SMG, and commercial hard carbon (HC) were investigated by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy. Additionally, their electrochemical properties, when used as anode materials in LIBs, were also investigated. The results show that MSC has a superior charging rate capability compared to SMG and HC. This is attributed to MSC having a more extensive interlayer spacing than SMG, and a greater number of favorably-oriented pathways when compared to HC.

Synthesis of activated carbon derived from chicken feather for Li-ion batteries through chemical and physical activation process

“…The intercalation of Li + ions in the cell with the CFCAs electrode begins at around 0.5-0.8 V during charging. This is due to the irreversible formation of a solid electrolyte interface layer on the carbon surface resulting from electrolyte decomposition subsequent reduction with Li + ions [1].…”

“…Lithium-ion batteries (LIBs) have received increasing interest in recent years due to their high-energy densities, long cycle lives, and environmental friendliness. At present, carbon materials are generally used as electrode materials for LIBs due to their small surface change, structural stability during cycling, high-energy density, lightweight, and long lifespan, and abundance [1,2]. However, most of the electrodes exhibit slow diffusivity of lithium ions due to their low active surface area, limiting the inner capacitive contribution of the active material, resulting in insufficient power and energy density [3].…”

3D Printing of Graphite Electrode for Lithium‐Ion Battery with High Areal Capacity

“…Due to the low lithium intercalation potential of lithium in graphite and the larger distance between graphite layers than the radius of lithium ion, the lithium ion is embedded in the interlayer to form Li x C 6 compound; therefore, it becomes an ideal carbon material for the anode of lithium‐ion battery. [ 6,7 ]…”

Using nanoconfinement to inhibit the degradation pathways of conversion-metal oxide anodes for highly stable fast-charging Li-ion batteries

“…The result is an exposed MO with a high surface area supporting matrix that leads to high irreversible capacity loss of 32.7% in the rst cycle as well as signicant overgrowth of the SEI layer (and depletion of the electrolyte). Unfortunately, high initial irreversible capacity loss has been generalizable to other carbon-encapsulation approaches as well, whether the carbonencapsulant surface is SEI-reactive (low-crystallized carbons >25% irreversible capacity loss 57 ) or practically SEI-inactive (crystalline graphite $10-15% irreversible capacity loss 58 ).…”