Files and links (1)
CC BY-NC V4.0, Open Access
Journal article
Synthesis of Amorphous Nickel-Cobalt Hydroxides for Ni-Zn Batteries
Chemistry : a European journal, Vol.30(59), e202402325
2024
PMID: 39114891
Abstract
In this work we developed a hydrothermal method for synthesizing amorphous Ni−Co hydroxide (NC(OH)) and in the subsequent step crystalline NiCo2O4 (NCO) has been produced using water as the solvent. For nickel-zinc batteries, NC(OH) was found to have superior performance to its NCO prepared by two-step process. The thermal stability analysis exhibited the optimum temperature to obtain the NC(OH), and NCO electrode materials. The XRD pattern showed mixed phases containing both Ni and Co hydroxides (during the initial step) and in the subsequent step (calcined) the formation of cubic spinel structure was noticed. For NC(OH), aggregated particles with irregular morphology were observed while clustered nanorod-like shapes were noticed for NCO samples. To be noted, that the nanorod morphology was obtained through a facile approach without employing any structure-directing agent. Both NC(OH) and NCO were employed as cathodes for Ni−Zn battery studies against Zn foil anode with a polyamide-based separator soaked in 6 M KOH saturated with ZnO additive was used as electrolyte. The Ni−Zn cell was fabricated in CR2032 coin cell configuration. The electrochemical studies such as cyclic voltammetry (CV) showed the characteristic redox peaks for NC(OH) sample exhibiting high peak current compared to its NCO counterpart. The NC(OH) had a capacity of 268 mAh g−1 against 120 mAh g−1 for NCO at a current density of 1 Ag−1. The cell was able to retain 85 % of the capacity at the end of 500 cycles and showed remarkable rate capability. The Ni−Zn battery presents energy and power densities of 428.8 Wh Kg−1 and 2.68 kW Kg−1, respectively surpassing the normal values reported for aqueous rechargeable batteries. Owing to the presence of Ni and Co in hydroxide form (reduced crystallinity) the NC(OH) sample showed improved electrochemical activity. This work provides a facile approach and effective strategy for developing bimetallic hydroxides for optimal energy storage performance.
Details
- Title
- Synthesis of Amorphous Nickel-Cobalt Hydroxides for Ni-Zn Batteries
- Authors/Creators
- Poongodi Ayyanusamy - Comenius University BratislavaSwathi Tharani D - PSG Institute of Advanced StudiesRuby Alphonse - PSG Institute of Advanced StudiesManickam Minakshi - Murdoch University, Centre for Water, Energy and WasteR Sivasubramanian - Amrita Vishwa Vidyapeetham
- Publication Details
- Chemistry : a European journal, Vol.30(59), e202402325
- Publisher
- Wiley-VCH GmbH
- Number of pages
- 9
- Grant note
- PSG Sons and Charities
- Identifiers
- 991005707259807891
- Copyright
- © 2024 The Authors
- Murdoch Affiliation
- Murdoch University; Centre for Water, Energy and Waste
- Language
- English
- Resource Type
- Journal article
Metrics
3 File views/ downloads
35 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 2 Chemistry
- 2.62 Electrochemistry
- 2.62.52 Electrode Materials
- Web Of Science research areas
- Chemistry, Multidisciplinary
- ESI research areas
- Chemistry