| Summary: | In recent years, Zinc-ion aqueous batteries (ZIABs) have gained significance in
popularity as an alternative to Lithium-ion batteries (LIBs) due to their ease of
accessibility, cost efficiency compared to Lithium, safety aspects, and environmental
friendliness. However, despite many favourable advantages, ZIABs still face
challenges, particularly in the formation of dendrites on the Zn anode surface, which
limits the electrochemical performance and cycle stability of ZIABs. In this Final Year
Project (FYP), a 3D Ti/TiO2 nanotube current collector coupled with Zn anode
(Zn@3D Ti/TiO2) was fabricated to ensure uniform Zn2+ ions diffusion such that there
will be a homogenous Zn2+ ions plating and stripping reaction during the charging and
discharging process. Material characterization tests were carried out to evaluate the
morphology, crystallinity well as elemental analysis of the fabricated 3D Ti/TiO2
nanotubes and synthesized Zn@3D Ti/TiO2 electrode. Next, electrochemical
characterization tests were carried out in symmetric coin batteries and full cell coin
batteries. The Zn@3D Ti/TiO2 | | Zn@3D Ti/TiO2 symmetric coin batteries cell was
evaluated against bare Zn || Zn symmetric coin batteries cells which was revealed to
have satisfactory cycle stability. Lastly, the electrochemical performance of Zn@3D
Ti/TiO2 || CNT@MnO2 full cell coin batteries were evaluated against bare Zn || MnO2
full cell coin batteries. From the result, the fabricated full cell coin batteries had a
higher specific capacity over a longer cycle period with higher cycle stability as
compared to bare Zn || MnO2 full cell coin batteries. Hence, the issue of capacity fading
caused by Zn dendrites due to inhomogeneous Zn2+ ions was better controlled. In
conclusion, the proposed strategy showed improvement of the cycle stability of ZIABs
by ensuring uniform Zn2+ ions diffusion to achieve homogenous Zn2+ ions plating and
stripping reaction during the charging and discharging process.
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