Hebbar, Vidyashree Viji, M. Budumuru, Akshay Kumar Gautam, Sanjeev Chae, Keun Hwa Balaji, K. Sundaram, N. T. Kalyana Subramani, A. K. Sudakar, C. 2024-01-19T17:02:57Z 2024-01-19T17:02:57Z 2021-09-05 2020-07-22 1944-8244 https://pubs.kist.re.kr/handle/201004/118369 A Li-rich layered oxide (LLO) cathode with morphology-dependent electrochemical performance with the composition Li1.23Mn0.538Ni0.117Co0.114O2 in three different microstructural forms, namely, randomly shaped particles, platelets, and nanofibers, is synthesized through the solid-state reaction (SSR-LLO), hydrothermal method (HT-LLO), and electrospinning process (ES-LLO), respectively. Even though the cathodes possess different morphologies, structurally they are identical. The elemental dispersion studies using energy-dispersive X-ray spectroscopy mapping in scanning transmission electron microscopy show uniform distribution of elements. However, SSR-LLO and ES-LLO nanofibers show slight Co-rich regions. The electrochemical studies of LLO cathodes are evaluated in terms of charging/discharging, C-rate capability, and cyclic stability performances. A high reversible capacity of 275 mA h g(-1) is achieved in the fibrous LLO cathode which also demonstrates good high-rate capability (80 mA h g(-1) at 10 C-rate). These capacities and rate capabilities are superior to those of SSR-LLO [210.5 mA h g(-1) (0.1 C-rate) and 4 mA h g(-1) (3 C-rate)] and HT-LLO [242 mA h g(-1) (0.1 C-rate) and 22 mA h g(-1) (10 C-rate)] cathodes. The ES-LLO cathode exhibits 88% capacity retention after 100 cycles at 1 C-rate. A decrease in voltage on cycling is found to be common in all three cathodes; however, minimal voltage decay and capacity loss are observed in ES-LLO upon cycling. Well-connected small LLO particles constituting fibrous microstructural forms in ES-LLO provide an enhanced electrolyte/cathode interfacial area and reduced diffusion path length for Li+. This, in turn, facilitates superior electrochemical performance of the electrospun Co-low LLO cathode suitable for quick charge battery applications. English American Chemical Society LITHIUM-ION BATTERIES HIGH-RATE PERFORMANCE CYCLING STABILITY NANOFIBERS NANOWIRES BEHAVIOR SIZE Morphology and Interconnected Microstructure-Driven High-Rate Capability of Li-Rich Layered Oxide Cathodes Article 10.1021/acsami.0c05752 1 ACS Applied Materials & Interfaces, v.12, no.29, pp.32566 - 32577 ACS Applied Materials & Interfaces 12 29 32566 32577 scie scopus 000555417200032 2-s2.0-85088490832 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article LITHIUM-ION BATTERIES HIGH-RATE PERFORMANCE CYCLING STABILITY NANOFIBERS NANOWIRES BEHAVIOR SIZE Li-rich layered oxides LLO microstructure morphology interconnected particles high-rate capability