Aug, 2026
ORNL Report
Publications
Showing 18 results for Author: Holly E. Humphrey
May, 2026
ORNL Report
M4FT-26OR0302010410 – METHODS TO PURIFY TEST SOLVENTS WITH CONSISTENT RESULTS
Apr, 2026
ORNL Report
Oak Ridge National Laboratory M4FT-26OR030201048 – Solvent Reconditioning Test Plan
Mar, 2026
Journal
Surface modification of cathode material enhances electrochemical performance in dry-processed Li-ion battery electrodes
The transition to electric vehicles (EVs) is pivotal for achieving energy security and integrating grid stability, with lithium-ion batteries (LIBs) playing a central role in this transformation. However, the conventional wet electrode manufacturing relying on N-methyl-2-pyrrolidone (NMP) solvent is energy intensive and costly. Dry processing (DP) has emerged as a promisin…
Sep, 2025
Journal
Enhanced Interfacial Bonding of Graft Copolymers
To understand how thermoplastic welding strength can be tuned through chemical modifications and macromolecular topology, we combined coarse-grained molecular dynamics (MD) simulations with experimental validation. Our simulations examined the diffusion dynamics of both linear and graft polymers across representative interfaces, revealing that diffusion-controlled interdig…
Aug, 2025
Journal
Long Carbon Fibers Boost Performance of Dry Processed Li-ion Battery Electrodes
Dry processing (DP) is an advanced manufacturing technique for lithium-ion battery (LIB) electrodes. Unlike conventional wet-process-based manufacturing that involves dissolving polyvinylidene fluoride (PVDF) binder in n-methyl-2-pyrrolidone (NMP) solvent for slurry-casting, DP involves fibrillation of polymer binders. This method offers environmental and cost benefits by…
Jul, 2025
Journal
Hierarchically Structured Vitrimer Biocomposites for Sustainable Manufacturing
Polymers containing dynamic covalent bonds (DCBs) exhibit thermoplastic-like flow above their topology freezing temperature (Tv) while maintaining thermoset-like properties below it, making them promising for sustainable manufacturing. However, their large-scale adoption remains limited due to challenges in accurately determining Tv and achieving efficient fiber-matrix bon…
Jul, 2025
Journal
Corrosion Resistant Hot Melt Adhesive to Bind Metals
Hot melt adhesives (HMAs) play an important role in many industries, and their demand is expected to grow. HMAs don't require any solvents, and their application results in the formation of strong bonds with the substrate upon cooling within seconds. These properties differentiate them from liquid glues and make them preferable for practical application. Currently, commerc…
Jul, 2025
Journal
Electroplated Polymer-Modified Carbon Fiber for Performance-Enhancing Composite Interfaces
Carbon fiber composite performance relies on the fiber-matrix interface for effective load transfer. To enhance interfacial properties between the fiber and matrix, often carbon fiber surfaces are oxidatively and covalently modified to incorporate chemical functional groups. By contrast, here, noncovalent electrodeposition of functional polyelectrolyte is applied onto cond…
Jul, 2025
Journal
Understanding interfacial crystallization dynamics on carbon fiber reinforced polypropylene composite manufacturing
Reinforcing polymers with discontinuous fibers improves mechanical properties, such as strength and stiffness, and in some cases achieve isotropic properties, rendering them suitable for various engineering applications. Matrix materials are generally highly engineered thermosets (e.g. crosslinked epoxies), bonded to the fiber periphery by proprietary surface and sizing ch…
Aug, 2024
Journal
Manufacturing of Continuous Core–Shell Hydrated Salt Fibers for Room Temperature Thermal Energy Storage
The encapsulation ofsalt hydrate phase change materials (PCMs) in uniform microscale bodies has yetbeen reported in research due in part to the delicate relationship betweenthermal performance and water-to-salt ratios which are easily altered duringmanufacturing. Herein, core–shell composite fibers comprised of a salt hydratePCM core and a poly(acrylonitrile) (PAN) shell a…