Islam, Mobinul Ali, Ghulam Jeong, Min-Gi Chung, Kyung Yoon Nam, Kyung-Wan Jung, Hun-Gi 2024-01-19T14:03:06Z 2024-01-19T14:03:06Z 2021-10-21 2021-08 0363-907X https://pubs.kist.re.kr/handle/201004/116638 NiCo2O4 nanoparticles (5-10 nm) were prepared by a simple sol-gel method and evaluated in the Li/Na-cell as an anode. The anode exhibited excellent lithium storage capacity (1050 and 860 mAh g(-1) at specific currents of 0.1 and 0.5 A g(-1), respectively) and outstanding cycling performance of over 200 cycles. However, it showed a moderate sodium storage capacity with poor cycle retention. A clear comparison of the structural stability of the electrode determined via the cross-sectional scanning electron microscopy (SEM) micrographs indicates swelling and extensive volume expansion in the Na cell. The investigations conducted using in situ X-ray diffraction (XRD) and ex situ X-ray absorption spectroscopy (XAS) reveal the limited reduction of Co and Ni oxidation states and a minimal degree of conversion during Na uptake. This study highlights the ability of NiCo2O4 nanoparticles to withstand high mechanical stress during the conversion reaction with Li, thus providing excellent performance. Conversely, the NiCo2O4 anode with Na could not be overcome massive volume expansion and irreversibility by reducing the size of particles in nano-dimension. English WILEY Electrochemical storage behavior of NiCo2O4 nanoparticles anode with structural and morphological evolution in lithium-ion and sodium-ion batteries Article 10.1002/er.6782 1 INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.45, no.10, pp.15036 - 15048 INTERNATIONAL JOURNAL OF ENERGY RESEARCH 45 10 15036 15048 scie scopus 000641766500001 2-s2.0-85104581469 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article conversion anode energy storage Li&#8208 ion battery Na&#8208 ion battery sol&#8208 gel process volume expansion