Soo, Kuan Lim (2017) Characterization Of Lithium Vanadium Oxide Anode With Agar Binder In Aqueous Rechargeable Lithium Ion Batteries. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Bahan Sumber Mineral. (Submitted)
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Abstract
The purpose of this work is to study the effect of agar binder in lithium vanadium oxide (LiV3O8) anode on the structural, morphology and electrochemical performance of the electrode. The anode electrode is fabricated by adding the active material (LiV3O8), electrical conductor (graphene) and binder (agar) in a specified ratio with percentage of agar binder being varied. The working electrode is compacted and allowed to be characterized as a half-cell setting. The structural analysis indicate that the agar binder has successfully banded the phases of LiV3O8 and graphene together prior to cycling. The morphological analysis proven that the agar binder is able to prevent delamination of the active mass. The electrochemical performances further consolidate the findings where the characterization is done in 5 M LiNO3 electrolyte. From cyclic voltammetry findings, with an optimized scan rate of 0.1 Mv s-1, the best performing electrode is one with 8 wt% agar binder. The anode half-cell also had high reversibility and high coefficient diffusion of lithium ions at 1.315 x 10-6 and 3.046 x 10-6 cm2 s-1 for anodic and cathodic peaks respectively. LiV3O8 anode demonstrated initial specific discharge capacity of 48 mAh g-1 under optimized scan rate 0.1 mV s-1. A good cyclic performance with 45 mAh g-1 (capacity retention of 93.75%) at the 10th cycle. The capacity fading upon cycling was supported by increasing charge transfer resistance from the impedance analysis. However, cracks observed on the surface of LiV3O8 anode upon cycling in morphological analysis indicated anisotropic volume change in the lattice parameter c upon intercalation/de-intercalation of lithium ions.
| Item Type: | Monograph (Project Report) |
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| Subjects: | T Technology T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials |
| Divisions: | Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral (School of Material & Mineral Resource Engineering) > Monograph |
| Depositing User: | Mr Mohamed Yunus Mat Yusof |
| Date Deposited: | 15 Apr 2022 03:07 |
| Last Modified: | 15 Apr 2022 03:07 |
| URI: | http://eprints.usm.my/id/eprint/52335 |
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