Novel Laser Patterned MXene Based Anodes For High Capacity Fast Charging Li-Ion Batteries

• Main Authors: Emani, H. R. K. M., Palaniappan, V., Maddipatla, D., Bazuin, B. J., Wu, Q., Atashbar, M. Z.
• Format: Conference Proceeding
• Language: English
• Subjects: 2D material; Etching; Fabrication; fast charging li-ion battery; high capacity; laser patterning; Lasers; Lewis acidic etching process; Lithium-ion batteries; MXenes; Powders; secondary pore network (SPN); Silicon; X-ray scattering
• ISSN: 2168-9229
• DOI: 10.1109/SENSORS52175.2022.9967280

A flexible anode was developed with 2D material MXenes (Ti 3 C 2 T x ) which gained attention recently as energy storage materials. MXenes were synthesized using Lewis acidic etching process from MAX phase powder (Ti 3 SiC 2 ) and molten salts such as copper chloride (CuCl 2 ), sodium chloride (NaCl) and potassium chloride (KCl). The synthesized MXenes when used as anode material were able to deliver a specific capacity close to 300 mAh/g at 0.1C. Laser patterning was added to the fabrication process to introduce secondary pore networks (SPN's) with pore diameter of 61\ \mu\mathrm{m} and edge-to-edge distance of 67\ \mu\mathrm{m} into the electrode. Electrochemical performance was evaluated for bar-coated, and laser patterned electrodes inside a CR 2032 half coin-cell with ethylene carbonate and diethyl carbonate (EC: DEC) in 50/50 (v/v) mixed in 1.0M lithium hexafluorophosphate (LiPF 6 ) as electrolyte. Cells with laser patterning showed superior performance at high C-rates such as 2C and 4C with specific capacities of 229 mAh/g and 202 mAh/g.