Minh Xuan Tran Smyrek, Peter Park, Jihun Pfleging, Wilhelm Lee, Joong Kee 2024-01-19T10:34:07Z 2024-01-19T10:34:07Z 2022-12-09 2022-11 2079-4991 https://pubs.kist.re.kr/handle/201004/114289 Femtosecond ultrafast-laser micro-patterning was employed to prepare a three-dimensional (3D) structure for the tape-casting Ni-rich LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode. The influences of laser structuring on the electrochemical performance of NMC811 were investigated. The 3D-NMC811 cathode retained capacities of 77.8% at 2 C of initial capacity at 0.1 C, which was thrice that of 2D-NMC811 with an initial capacity of 27.8%. Cyclic voltammetry (CV) and impedance spectroscopy demonstrated that the 3D electrode improved the Li+ ion transportation at the electrode-electrolyte interface, resulting in a higher rate capability. The diffusivity coefficient DLi+, calculated by both CV and electrochemical impedance spectroscopy, revealed that 3D-NMC811 delivered faster Li+ ion transportation with higher DLi+ than that of 2D-NMC811. The laser ablation of the active material also led to a lower charge-transfer resistance, which represented lower polarization and improved Li+ ion diffusivity. English MDPI Ultrafast-Laser Micro-Structuring of LiNi0.8Mn0.1Co0.1O2 Cathode for High-Rate Capability of Three-Dimensional Li-ion Batteries Article 10.3390/nano12213897 1 Nanomaterials, v.12, no.21 Nanomaterials 12 21 Y scie scopus 000883610100001 2-s2.0-85141885064 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article HIGH-ENERGY DENSITY ELECTROCHEMICAL PERFORMANCE CYCLING STABILITY THICK ELECTRODES OXIDE CATHODE LAYER three-dimensional batteries LiNi0.8Mn0.1Co0.1O2 cathode femtosecond ultrafast laser electrode micro-structuring