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Browsing by Subject "Lithium-ion batteries"

Now showing items 1-18 of 18

Amplification of the discharge current density of lithium-ion batteries with spinel phase Li(PtAu)0.02Mn1.98O4 nano-materials

Author: Ross, N ; Iwuoha, EI ; Ikpo, CO ; Baker, P ; Njomo, N ; Mailu, SN ; Masikini, M ; Matinise, N ; Tsegaye, A ; Mayedwa, N ; Waryo, T ; Ozoemena, KI ; Williams, A Date: May 2014 In this study the synergistic and catalytic properties of a novel nano-composite cathode material of nominal composition Li(M)(subx)Mn(sub2-x)O(sub4) (M = Pt-Au; x # 0.2) has been explored. Li(PtAu)xMn(sub2-x)O4 nanomaterial for use in ... Read more
Battery energy storage systems value chain analysis for the identification of opportunities for enterprise development

Author: Pandarum, Aradhna ; Rakaibe, Tshwanelo K ; Mbam, Vuyo Date: Oct 2023 South Africa is confronted by the triple threat of inequality, poverty, and unemployment and has the highest inequality and unemployment rate in the world. The energy transition to a low carbon economy offers significant opportunity for the ... Read more
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
Electrochemical performance of co-doped Li1.2Mn0.6Ni0.2O2 cathode materials

Author: David, K ; Mhlabeni, Thobile ; Luo, H Date: Apr 2013 The composite material has a xLi2MnO3·(1-x)LiMO2 (M = Mn, Co, Ni) structure has been considered as one of the most promising cathode materials for advanced lithium-ion batteries due to their low-cost and high capacity (> 200 mAh g−1) between ... Read more
Enhanced performance of LiNi0.03Mo0.01Mn1.96O4 cathode materials coated with biomass-derived carbon layer

Author: Zhang, M ; Chen, M ; Shao, Y ; Song, H ; Liu, L ; Ren, Jianwei ; Liao, S Date: Mar 2019 A high-performance Ni/Mo co-doped lithium manganate composite material, LiNi0.03Mo0.01Mn1.96O4, is prepared by a solidstate method, then a biomass-derived carbon layer with ethyl cellulose as the carbon source is applied to the surface of the ... Read more c b
A facile segregation process and restoration of LiMn2 O4 cathode material from spent lithium-ion batteries

Author: Palaniyandy, Nithyadharseni ; Rambau, Khavharendwe MA ; Musyoka, Nicholas ; Ren, Jianwei Date: Apr 2020 Due to its three-dimensional tunnel structure, the spinel LiMn2[sub]O4[sub] (LMO) cathode material is highly favourable for the migration of lithium ions. Thus, LMO has been used as a commercial cathode material for the electronic devices ... Read more
A facile segregation process and restoration of LiMn2O4 cathode material from spent lithium-ion batteries

Author: Palaniyandy, Nithyadharseni ; Rambau, Khavharendwe MA ; Musyoka, Nicholas M ; Ren, Jianwei Date: Apr 2020 Due to its three-dimensional tunnel structure, the spinel LiMn2O4 (LMO) cathode material is highly favourable for the migration of lithium ions. Thus, LMO has been used as a commercial cathode material for the electronic devices such as mobile ... Read more
Fluorinated Mn3O4 nanospheres for lithium-ion batteries: Low-cost synthesis with enhanced capacity, cyclability and charge-transport

Author: Palaniyandy, Nithyadharseni ; Nkosi, Funeka P ; Raju, Kumar ; Ozoemena, KI Date: Apr 2018 A facile synthesis of fluorinated Mn3O4 nano-spheres (F-Mn3O4) from low-cost electrolytic manganese dioxide (EMD) at different temperatures and times has been reported. While the as-prepared materials are micron-sized (>200 nm) and the ... Read more
Gel-combustion synthesized vanadium pentoxide nanowire clusters as cathode material for rechargeable lithium-ion batteries

Author: Ramasami, AK ; Reddy, MV ; Nithyadharseni, P ; Chowdari, BVR ; Balakrishna, GR Date: Feb 2017 Gel-combustion by a bio-fuel, processed starch of the root tuber of cassava (Manihot esculenta), was used to prepare vanadium pentoxide nanowire clusters (V2O5NWC). The as-synthesized product was characterized by X-ray diffraction (XRD), ... Read more
Influence of microwave irradiation and combustion fuels on the rate capability and cycle performance of Li1.2Mn0.52Ni0.13Co0.13Al0.02O2 layered material

Author: Nkosi, Funeka ; Palaniyandy, Nithyadharseni ; Raju, Kumar ; Ozoemena, K Date: Oct 2020 Commercialization of lithium-manganese rich oxides (LMR-NMC) cathodes for lithium-ion batteries is hindered by shortcomings such as severe capacity fade and poor rate capability. This work reveals the synergetic effect of the structure and ... Read more
Manganese-based metal organic framework from spent Li-Ion batteries and its electrochemical performance as anode material in Li-ion battery

Author: Rambau, Khavharendwe MA ; Musyoka, Nicholas M ; Palaniyandy, Nithyadharseni ; Manyala, N Date: Jan 2021 Herein, we report a method of recycling spent lithium-ion batteries (LIBs) cathode materials by utilizing them as a metal feedstock for the synthesis of Mn-based metal-organic frameworks (Mn-MOF). Spent cathodes were converted to manganese ... Read more
Metal oxide-based anode materials for lithium-ion battery

Author: Kebede, Mesfin A ; Palaniyandy, Nithyadharseni Date: Dec 2019 One of the main and crucial components of a lithium-ion battery (LIB) is the anode, a negative electrode as equally significant as the cathode positive electrode. Anodes are typically characterized by delivering a high capacity with low ... Read more
Microwave-assisted synthesis of high-voltage nanostructured LiMn1.5Ni0.5O4 spinel: tuning the Mn3+ content and electrochemical performance

Author: Jafta, CJ ; Mathe, Mahlanyane K ; Manyala, N ; Roos, WD ; Ozoemena, KI Date: Aug 2013 The LiMn1.5Ni0.5O4 spinel is an important lithium ion battery cathode material that has continued to receive major research attention because of its high operating voltage (∼4.8 V). This study interrogates the impact of microwave irradiation ... Read more
Next-generation nanostructured lithium-ion cathode materials: critical challenges for new directions in R&D

Author: Ozoemena, K ; Kebede, Mesfin A Date: Jul 2016 Every market analysis predicts that lithium-ion batteries (LIBs) will dominate energy storage technologies for now and the foreseeable future. LIBs will drive many applications ranging from portable electronics to electric vehicles and smart ... Read more
Research and development of advanced batteries and supercapacitors at the CSIR

Author: Ozoemena, KI Date: Oct 2015 With the increasingly fast global uptake of clean and renewable energy sources like solar and wind power plants and the unprecedented use of smartphones, laptops and tablets, new high-performance electrical energy storage technologies are ... Read more
Stable nickel-substituted spinel cathode material (LiMn1.9Ni0.1O4) for lithium-ion batteries obtained by using a low temperature aqueous reduction technique

Author: Kunjuzwa, Niki ; Kebede, Mesfin A ; Ozoemena, Kenneth I ; Mathe, Mahlanyane K Date: Nov 2016 A nickel substituted spinel cathode material (LiMn1.9Ni0.1O4) with enhanced electrochemical performance was successfully synthesized by using a locally-sourced, low-cost manganese precursor, electrolytic manganese dioxide (EMD), and NiSO4·6H2O ... Read more c b
Synthesis of Li4Ti5O12 and its electrochemical properties

Author: Liu, G ; Wen, L ; Kebede, Mesfin A ; Luo, H Date: Dec 2011 Lithium-ion batteries are now well established in the market as the rechargeable power source. The spinel Li4Ti5O12 has many advantages over the graphite, although, which has been used as anode since lithium ion batteries was invented. Li4Ti5O12 ... Read more
Transition metal alloy-modulated lithium manganese oxide nanosystem for energy storage in lithium-ion battery cathodes

Author: West, N ; Ozoemena, KI ; Ikpo, CO ; Baker, PGL ; Iwuoha, EI Date: Jul 2013 This paper explores the synergistic and catalytic properties of a newly developed lithium ion battery (LIB) composite cathode of LiMn(sub2)O(Sub4) modified with bimetallic (Au–Fe) nanoparticle. Spinel phase LiMn(sub)2O(sub4) was doped with ... Read more

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