K. Shamara Weeraratne

ORCID: 0000-0002-5842-7168
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About
Contact & Profiles
Research Areas
  • Advanced Battery Materials and Technologies
  • Covalent Organic Framework Applications
  • Advanced battery technologies research
  • Conducting polymers and applications
  • Advancements in Battery Materials
  • Advanced Photocatalysis Techniques
  • Electric Power Systems and Control
  • Extraction and Separation Processes
  • Metal-Organic Frameworks: Synthesis and Applications

Virginia Commonwealth University
2019-2022

The use of redox-active organic materials in rechargeable batteries has the potential to transform field by enabling lightweight, flexible, green while replacing lithium with sodium would mitigate limited supplies and high cost lithium. Herein, we report first highly porous azo-linked polymers (ALPs) as a new electrode material for sodium-ion batteries. ALPs are cross-linked therefore eliminate solubility issue electrodes common electrolytes, which is prominent small molecules leads fast...

10.1021/acsami.9b05956 article EN ACS Applied Materials & Interfaces 2019-06-10

Redox-active covalent organic frameworks (COFs) are a new class of material with the potential to transform electrochemical energy storage due well-defined porosity and readily accessible redox-active sites COFs. However, combining both high specific capacity density in COF-based batteries remains considerable challenge. Herein, we demonstrate exceptional performance Aza-COF rechargeable sodium-ion (SIBs). is microporous 2D COF synthesized from hexaketocyclohexane 1,2,4,5-benzenetetramine by...

10.1021/acsami.0c20915 article EN ACS Applied Materials & Interfaces 2021-03-22

Abstract Covalent organic frameworks (COFs) hold great promise for electrochemical energy storage because of their high surface area, readily accessible redox‐active sites, and environment‐friendly chemical composition. In this study, the synthesis a pyrene‐containing polyimide COF (PICOF‐1) by linker exchange using an imine‐linked as template is reported its performance in sodium‐ion batteries (SIBs) demonstrated. The synthetic route based on mitigates challenges typically encountered with...

10.1002/marc.202200782 article EN cc-by-nc-nd Macromolecular Rapid Communications 2022-11-17

Noble metal single-atom catalysts maximize utilization and offer opportunities to design heterogeneous at the molecular scale. Mesoporous covalent organic frameworks provide an ideal support stabilize single atoms with specific ligand configuration similar a homogeneous catalyst. In this work, high loading of Pd atoms, 18.1 wt %, on mesoporous imine-linked framework was synthesized, characterized, evaluated for ethylene hydrogenation. X-ray photoelectron spectroscopy, absorption...

10.1016/j.xcrp.2021.100495 article EN cc-by-nc-nd Cell Reports Physical Science 2021-07-01

The rechargeable lithium-sulfur (Li-S) battery is a promising candidate for the next generation of energy storage technology, owing to high theoretical capacity, specific density, and low cost electrode materials. main drawbacks in development long-life Li-S batteries are capacity fading sluggish kinetics at cathode caused by polysulfides shuttle. These limitations addressed through design novel nanocages containing cobalt phosphide (CoP) nanoparticles embedded highly porous nitrogen-doped...

10.1002/chem.202001664 article EN Chemistry - A European Journal 2020-06-26
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