W. R. M. Makahnouk

ORCID: 0009-0005-6867-1059
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About
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Research Areas
  • Advanced Battery Materials and Technologies
  • Advancements in Battery Materials
  • Chemical Synthesis and Characterization
  • Hydrocarbon exploration and reservoir analysis
  • earthquake and tectonic studies
  • Inorganic Fluorides and Related Compounds
  • Geological Studies and Exploration
  • Methane Hydrates and Related Phenomena
  • Inorganic Chemistry and Materials
  • Extraction and Separation Processes
  • Advanced Battery Technologies Research
  • Geological and Geochemical Analysis

University of Waterloo
2007-2024

We report new solid state and hydrothermal synthetic routes to (Li,Na)2FePO4F that incorporate carbon-containing additives result in good electrochemical properties of this Li (or Na) ion electrode material. Single crystal X-ray diffraction analysis Na2FePO4F prepared by flux growth confirms the unusual structural features compound include pairs face-sharing metal octahedra [6 + 1] coordination sodium ions. Facile Na−Li ion-exchange occurs upon reflux with lithium salts, cycling a cell (vs....

10.1021/cm902023h article EN Chemistry of Materials 2009-11-13

Lithium transition metal phosphate olivines such as LiFePO4 have been recognized very promising electrodes for lithium-ion batteries because of their energy storage capacity combined with electrochemical and thermal stability. A key issue in these materials is to determine the synthetic conditions optimum control particle size morphology, ideally find those that result nanocrystalline products. Here, we report a full study examines synthesis material via hydrothermal methods give single...

10.1039/b705443m article EN Journal of Materials Chemistry 2007-01-01

In the recent hunt for novel Na-ion cathode hosts, a variety of sodium analogues classic Li-ion structures have been thoroughly explored. However, generally possess modified and dissimilar energetics compared to their due large size Na+ (102 pm) vs Li+ (76 pm), often resulting in sluggish kinetics. Materials development targeted toward new different specific host possessing optimum properties migration is crucial. Here, we report first metal fluoropyrophosphate with three-dimensional...

10.1021/cm504058k article EN Chemistry of Materials 2015-01-05

Abstract Deep fracture‐hosted fluids of Precambrian bedrock cratons are relatively stagnant over long time spans compared to near‐surface systems. However, episodic events, such as fracture reactivations, transgressions, and deglaciations, may introduce dilute water, replacing, mixing with the deep continental brines, thereby sparking microbial activity. Secondary minerals that line fractures serve important geochemical archives for events. Here we explore mineral record Archean rocks...

10.1029/2024gc011646 article EN cc-by Geochemistry Geophysics Geosystems 2024-09-01

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at glance that was extracted from about 100 leading journals. To access of an article which published elsewhere, please select “Full Text” option. The original trackable via the “References”

10.1002/chin.201031010 article EN ChemInform 2010-07-09

Abstract Single crystals of Na 4 NiP 2 O 7 F are prepared by a flux reaction NiO with excess PO 3 (Au crucible in silica tube, 675 °C, 8 h; cooling to 400 °C within 10 h).

10.1002/chin.201517013 article EN ChemInform 2015-04-01
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