Radzi, Z. and Balakrishnan, Vengadaesvaran and Pandey, A. K. and Kufian, Mohd Zieauddin and Rahim, Nasrudin Abd and Sheikh Raihan, Siti Rohani and Ramesh, Subramaniam (2022) Structural, electrical and electrochemical characterization of hybrid morphological LiNi0.5Mn1.5O4 cathode material. Physica B-Condensed Matter, 624. ISSN 0921-4526, DOI https://doi.org/10.1016/j.physb.2021.413376.
Full text not available from this repository.Abstract
Spinel LiNi(0.5)Mr(0.5)O(4) (LNMO) cathode are effectively obtained by one-pot hydrothermal synthesis. Scanning electron microscopy (SEM) reveals the hybrid morphological of LNMO, featuring cotton-like structures (400-800 nm) and rod-like structures (90-150 nm). The equivalent circuit well describes the Nyquist plot to separate the grain and grain boundary effects. According to the Maxwell-Wagner model, the complex permittivity confirms non-homogenous layers' existence; highly conducting grains and poorly conducting grain boundaries. Non-overlapping polar tunneling (NSPT) and correlated barrier hopping (CBH) are two responsible models for the conduction mechanism at low and high temperatures. Further, identical activation energy values are observed for hopping frequency, and peak frequency from normalized parameters Z''/Z''(max) and M''/M''(max), suggesting Li+ ions are the dominant charge carriers. The LNMO/Li cell delivers higher discharge capacity than commercial LNMO/Li cell from prior study, credits from the bridging features between rod-like and cotton-like particles.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education (MOHE), Malaysia under the Fundamental Research Grant Scheme (FRGS) [Grant No: FP034-2020], UM Power Energy Dedicated Advanced Centre (UMPEDAC), Higher Institution Center of Excellence (HICoE) Program Research Grant, UMPEDAC -2018 (MOHE HICOE -UMPEDAC), Ministry of Education Malaysia, University of Malaya [Grant No: RU007-2018 & RU012-2019] |
| Uncontrolled Keywords: | Hydrothermal; Impedance; Electric modulus; Activation energy; Hybrid morphological structures |
| Subjects: | Q Science > QC Physics |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > UM Power Energy Dedicated Advanced Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 18 Oct 2023 06:43 |
| Last Modified: | 18 Oct 2023 06:43 |
| URI: | http://eprints.um.edu.my/id/eprint/42099 |
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