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Browsing by Impact Area "Electrochemical Energy"

Now showing items 1-17 of 17

Current status and trends in spinel cathode materials for lithium-ion battery

Author: Kebede, Mesfin A ; Palaniyandy, Nithyadharseni ; Koao, LF ; Ezema, FI ; Mhlongo, MR Date: Nov 2021 Lithium-ion batteries (LIBs) are the most suitable and preferred energy storage system for powering electric vehicles (EVs), plug-in hybrid electric vehicles (PHEVs), and stationary applications owing to their attractive properties including ... Read more
Dual performance of fuel cells as efficient energy harvesting and storage systems

Author: Chinecherem, A ; Kebede, Mesfin A Date: Nov 2021 The need for increased energy security in the nation has diverted energy sources from conventional forms to the use of fuel cells. Fuel cells are generally accepted for electricity generation due to their increased conversion efficiency, ... Read more
The effect of ultrasonic cavitation on surficial properties of metals and industrial processes

Author: Zheng, Haitao ; Mathe, Mkhulu Date: Sep 2023 Ultrasonic cavitation is a phenomenon that occurs when high-frequency sound waves are introduced into a liquid medium, causing the formation and collapse of small bubbles within the liquid. These bubbles generate high-energy shock waves that ... Read more
Electro-design of bimetallic PdTe electrocatalyst for ethanol oxidation: Combined experimental approach and ab initio Density Functional Theory (DFT)-Based Study

Author: Mkhohlakali, A ; Fuku, X ; Seo, MH ; Modibedi, Remegia M ; Khotseng, L ; Mathe, M Date: Oct 2022 An alternative electrosynthesis of PdTe, using the electrochemical atomic layer deposition (E-ALD) method, is reported. The cyclic voltammetry technique was used to analyze Au substrate in copper (Cu2+), and a tellurous (Te4+) solution was ... Read more
Electrodeposition of ternary BiTePd nanofilm electrocatalyst using surface-limited reaction for direct ethanol fuel cell

Author: Mkhohlakali, Andile ; Fuku, Xolle ; Modibedi, Remegia M ; Khotseng, L ; Mathe, Mkhulu Date: Apr 2022 Herein, we report electro-synthesis of BiTePd using electrochemical atomic layer deposition (E-ALD). The SEM-EDS, AFM, and XRD were used to characterize Pd-based thin films' surface morphology and structure composition. BiTePd electrocatalyst ... Read more
Electroformation of Pd-modified thin film electrocatalysts using E-ALD technique

Author: Mkhohlakali, AC ; Fuku, X ; Modibedi, Remegia M ; Khotseng, LE ; Mathe, Mkhulu K Date: Jul 2021 Electrochemical atomic layer deposition was used to form bimetallic (BiPd, CuPd) and trimetallic (CuBiPd) thin films via surface-confined reactions. Pd thin films were characterized by cyclic voltammetry, scanning electron microscopy (SEM) ... Read more
First-principles investigation of W-V and W-Mo alloys as potential plasma facing materials (PFMs) for nuclear application bondMo alloys as potential plasma facing materials (PFMs) for nuclear application

Author: Phasha, MJ ; Bolokang, Amogelang S ; Kebede, Mesfin A Date: Feb 2021 Density-functional theory (DFT) based first-principles calculations were used to investigate the crystal structure, binding energy, phase stability and elastic properties of body-centered cubic (BCC) W-based binary solid solutions. The effect ... Read more
High rate and stable capacity performance of 2D LiMn1.5Ni0.5O4 nanoplates cathode with ultra-long cycle stability

Author: Palaniyandy, N ; Reddy, MV ; Zaghib, zK ; Kebede, Mesfin A ; Raju, Kumar ; Modibedi, Remegia M ; Mathe, Mahlanyane K ; Abhilash, KP ; Balamuralikrishnan, S Date: May 2022 Typically, the high electrochemical performance of cathode materials is achieved by fine-tuning the surface morphology and particle size of the nano-electrode materials. Two-dimensional (2D) nanomaterials like nanoplates show astounding ... Read more
Identifying surface degradation, mechanical failure, and thermal instability phenomena of high energy density Ni-rich NCM cathode materials for lithium-ion batteries: A review

Author: Geldasa, FT ; Kebede, Mesfin A ; Shura, MW ; Hone, FG Date: Feb 2022 Among the existing commercial cathodes, Ni-rich NCM are the most promising candidates for next-generation LIBs because of their high energy density, relatively good rate capability, and reasonable cycling performance. However, the surface ... Read more
The impact of ultrasonic parameters on the exfoliation of NiFe LDH nanosheets as electrocatalysts for the oxygen evolution reaction in alkaline media

Author: Munonde, Tshimangadzo S ; Zheng, Haitao Date: Aug 2021 The ultrasonic process has been examined to exfoliate layered materials and upgrade their properties for a variety of applications in different media. Our previous studies have shown that the ultra-sonication treatment in water without chemicals ... Read more
Influence of Co doping on physiochemical properties of MnFe2O4/C nano compounds toward oxygen reduction reaction

Author: Matseke, Mphoma, S ; Zheng, Haitao ; Mathe, Mkhulu K ; Carleschi, E ; Doyle, B Date: Dec 2021 Recently, several researchers have found that the manganese ferrite (MnFe2O4) nanoparticle can be a promising candidate for the oxygen reduction reaction (ORR). However, the MnFe2O4 nanoparticles still face challenges on their ORR activity ... Read more
Insight into thermal effect on the surface properties and potentials of MnO2 (a, ß, Y) as electrocatalysts for the oxygen reduction reaction

Author: Zheng, Haitao ; Shi, Xuan ; Jiang, S ; Han, X ; Wen, L Date: Nov 2023 The purpose of the work is to study the thermal behavior of MnO2 (a, ß, ) nanomaterials as well as their performance in oxygen reduction reaction (ORR) before/after thermal treatment. After thermal treatment, oxygen vacancies were introduced ... Read more
Microwave-induced defective PdFe/C nano-electrocatalyst for highly efficient alkaline glycerol oxidation reactions

Author: Mphahlele, Nonhlanhla E ; Ipadeola, AK ; Haruna, AB ; Mwonga, PV ; Modibedi, Remegia M ; Palaniyandy, Nithyadharseni ; Billing, C ; Ozoemena, KI Date: Mar 2022 Pd-based mono- and bi-metallic nano-electrocatalysts (Pd/C and PdFe/C) have been synthesized using two different methods for comparison: conventional sodium borohydride (NaBH4) route and microwave-assisted reduction process. The performance ... Read more
Performance of BiCu2O modified Pd/C as an anode electrocatalyst for direct ethanol fuel cell system

Author: Fuku, X ; Modibedi, Remegia M Date: Aug 2023 BiCu2O Modified Pd/C nanocatalyst was synthesised via an eco-friendly method for fuel cell application. The obtained nanomaterials' structural composition, and electrochemical properties were investigated using chemical and physical techniques ... Read more
Preparation and electrochemical properties of uniform spherical lithium rich materials xLi2MnO3∙(1-x)LiMn1/3Ni1/3Co1/3O2

Author: Zhou, S ; Liu, G ; Luo, Hongze Date: Sep 2021 The lithium-rich materials xLi2MnO3·（1-x）LiMn1/3Ni1/3Co1/3O2, with uniform spherical shape of 1 µm are successfully prepared via a hydrothermal method combined with calcination process. The content of Li2MnO3 is tuned by adjusting the content ... Read more
The thermal kinetics of methanol oxidation on Pt/MWCNT electrocatalysts in alkaline media

Author: Zheng, Haitao ; Modibedi, Mmalewane Date: Sep 2023 In this study, the thermal electrooxidation of methanol on a Pt/MWCNT catalyst was examined in alkaline media across the temperature range of 298-363 K. The investigation utilized cyclic voltammetry (CV), quasi-state polarization, and ... Read more
The upgraded performance of the NiFe2O4 /C electrocatalyst using Co substitution for the oxygen reduction reaction in an alkaline solution

Author: Matseke, Mphoma S ; Luo, Hongze ; Wen, L ; Zheng, Haito Date: Jun 2022 NiFe2O4 is one of the most abundant and inexpensive spinels; however, its activity toward the oxygen reduction reaction (ORR) is relatively low. For the first time, Co-substituted Fe partly of the NiFe2O4 electrocatalyst was studied to improve ... Read more

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