Electrochemical storage behavior of NiCo2O4 nanoparticles anode with structural and morphological evolution in lithium‐ion and sodium‐ion batteries. (21st April 2021)

• Record Type: Journal Article
• Authors: Islam, Mobinul; Ali, Ghulam; Jeong, Min‐Gi; Chung, Kyung Yoon; Nam, Kyung‐Wan; Jung, Hun‐Gi
• Is Part Of: International journal of energy research. Volume 45:Number 10(2021)
• Page Start: 15036
• Page End: 15048
• Publication Date: 2021-04-21
• Subjects: conversion anode -- energy storage -- Li‐ion battery -- Na‐ion battery -- sol‐gel process -- volume expansion; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.6782
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: NiCo2 O4 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 NiCo2 O4 nanoparticles to withstand high mechanical stress during the conversion reaction with Li, thus providing excellent performance. Conversely, the NiCo2 O4 anode with Na could not be overcome massive volume expansion and irreversibility by reducing the size of particles in nano‐dimension. Abstract : Tiny NiCo2 O4 nanoparticles synthesized by a simple sol‐gel method accomplish to accommodate the stress‐strain induced during the electrochemical conversion reactions in Li‐ion batteries, thus exhibits a much enhanced and stable cycling performance. In contrast, NiCo2 O4 nanoparticles could not overcome massive volume expansion and irreversibility during conversion reaction in Na‐ion batteries; thus, result in rapid capacity falloff.