Author:Gummow, RJ; Thackeray, MMDate:Dec 1993LT-LiC0.9Ni0.1O2 prepared at 400 degrees C with a structure that is intermediate between an ideal lithiated spinel and a layered structure has been investigated as an electrode in rechargeable Lithium cells; it delivers a voltage vs. pure ...Read more
Author:Smith, Suzanne; Bezuidenhout, Petroné; Mbanjwa, Mesuli; Zheng, Haitao; Conning, MarietteDate:Sep 2016We present a method for the development of paper-based electrochemical sensors for detection of heavy metals in water samples. Contaminated water leads to serious health problems and environmental issues. Paper is ideally suited for point-of-care ...Read more
Author:Mathe, Ntombizodwa R; Nkosi, SS; Motaung, DE; Scriba, Manfred R; Coville, NJDate:May 2015The electronic, magnetic and electrocatalytic properties of bimetallic thiol-capped Pt/Co and Pt/Ni nanoparticles were synthesised using two reducing agents, NaBH(sub4) and N(sub2)H(sub4). X-ray diffraction analysis of the nanoparticles showed ...Read more
Author:David, K; Mhlabeni, Thobile; Luo, HDate:Apr 2013The 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
Author:Gummow, RJ; Thackeray, MMDate:May 1994Cathode materials that have been synthesized by reduction of lithium-manganese- Cathode materials that have been synthesized by reduction of lithium-manganese-oxide and manganese-oxide precursors with hydrogen at 300 to 350-degrees-C, and ...Read more
Author:Popoola, API; Pityana, Sisa L; Popoola, OMDate:Oct 2011Poor corrosion performance of aluminium alloys in marine environment has been a subject of intensive research recently. Aluminium substrate was alloyed with a combination of two metallic powders (Cu + Mo) using an Nd: YAG solid state laser. ...Read more
Author:Kebede, Mesfin ADate:Aug 2019This presentation highlights the following topics: Introduction & applications of LIB; LiMn(sub2)O(sub4)(LMO), LiMn(sub1.5)Ni(sub0.5)O(sub)4(LMNO) cathodes and their challenges; LMO nanorods; Microwave irradiated LMNO and LMNOmic and LMO/LMNO ...Read more
Author:Rossouw, Claire A; Raju, Kumar; Zheng, Haitao; Ozoemena, Kenneth IDate:Jul 2017Manganese-doped lithium iron phosphate (LFMP) integrated with reduced graphene oxide (RGO) has been prepared via microwave-assisted synthesis and investigated as lithium-ion energy storage system in aqueous Li2SO4 electrolyte. The doping of ...Read more
Author:Ozoemena, KI; Mamuru, SA; Fukuda, T; Kobayashi, N; Nyokong, TDate:Jun 2009Novel hexabutylsulphonyltribenzotetraazachlorin–fullerene (C60) complexes of iron (FeHBSTBTAC–C60) and cobalt (CoHBSTBTAC–C60) have been synthesized and their electrochemistry and oxygen reduction reaction (ORR) compared with their ...Read more
Author:Jafta, CJ; Mathe, Mahlanyane K; Manyala, N; Roos, WD; Ozoemena, KIDate:Aug 2013The 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
Author:Ozoemena, Kenneth I; Chen, SDate:2016This book provides an authoritative source of information on the use of nanomaterials to enhance the performance of existing electrochemical energy storage systems and the manners in which new such systems are being made possible. The book ...Read more
Author:Melchior, SA; Palaniyandy, Nithyadharseni; Sigalas, I; Iyuke, SE; Ozoemena, KIDate:Feb 2019The performance of MXenes (Ti2CTx) combined with electrolytic manganese dioxide (EMD) in three different weight ratios (i.e. MXene:EMD = 20:80; 50:50; 80:20) were examined as anode material for Lithium-ion batteries (LIBs). A study of the ...Read more
Author:Thackeray, MM; Rossouw, MH; Gummow, RJ; Liles, DC; Pearce, K; De Kock, A; David, WIF; Hull, sDate:Jun 1993A pure and highly crystalline form of ramsdellite-MnO2 has been synthesized by acid treatment of the spinels LiMn2O4 and Li2Mn4O9 at 95°C. Although the ramsdellite-MnO2 framework remains intact on lithiation at 70°C, the hexagonally-close-packed ...Read more
Author:Liu, GQ; Wen, L; Liu, GY; Luo, HZ; Ma, BY; Wu, QY; Tian, YWDate:Aug 2011Spinel compound LiNi0.4Mn1.5Cr0.1O4 (LNMCO) and Li4Ti5O12 (LTO) were synthesized by the sol-gel method and the solid-state method, respectively. The particle sizes of the products LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12 were 0.5 to 2 um and 0.5 to ...Read more
Author:Nonjola, Patrick NT; Siegert, U; Swarts, JCDate:Feb 2015Ferrocenylamides, Fc–(CH(sub2))subn–CONH(sub2) with n = 0 (3a), 1 (3b), 2 (3c), and 3 (3d) and Fc =ferrocenyl = FeII(C(sub5)H(sub5))(C(sub5)H(sub4)), were synthesised by reacting aqueous ammonia with the appropriate acid chlorides, ...Read more
Author:Vaivars, G; Kleperis, J; Chikvaidze, G; Luo, H; Mathe, Mahlanyane KDate:Aug 2009The research on ion-exchange membranes has grown considerably in recent years with the growing interest in fuel cell technology for the automotive and portable applications. The requirements for a fuel cell membrane are the following: high ...Read more