2026 Washington State Fusion Week and 13th Annual CleanTech Innovation Showcase
Researchers from PNNL will participate in both the 2026 Washington State Fusion Week and the 13th annual CleanTech Innovation Showcase, highlighting expertise in fusion energy, advanced materials, geosciences, and other technologies.
Nanomaterials for Sodium-Ion Batteries
We prepared single, crystalline, Na4Mn9O18 nanowires with a polymer-pyrolysis method using polyacrylates of Na and Mn as precursor compounds. The optimized Na4Mn9O18 materials display high crystallinity and a homogeneous nanowire structure, which provides a mechanically stable structure as well as a short diffusion path for Na-ion intercalation and extraction. The Na4Mn9O18 nanowires have shown a high reversible capacity (128 mA h g-1 at 0.1C), excellent cycleability (77% capacity retention for 1000 cycles at 0.5C), and promising rate capability for Na-ion battery applications. The outstanding performance of the Na4Mn9O18 nanowires makes them a promising candidate to construct a viable and low-cost Na-ion battery system for upcoming power and energy storage systems.
Systems and Methods for Removing Components of a Gas Mixture
A system for removing components of a gaseous mixture is provided comprising: a reactor fluid containing vessel having conduits extending therefrom, aqueous fluid within the reactor, the fluid containing a ligand and a metal, and at least one reactive surface within the vessel coupled to a power source. A method for removing a component from a gaseous mixture is provided comprising exposing the gaseous mixture to a fluid containing a ligand and a reactive metal, the exposing chemically binding the component of the gaseous mixture to the ligand. A method of capturing a component of a gaseous mixture is provided comprising: exposing the gaseous mixture to a fluid containing a ligand and a reactive metal, the exposing chemically binding the component of the gaseous mixture to the ligand, altering the oxidation state of the metal, the altering unbinding the component from the ligand, and capturing the component.
SOCRATES
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Akhila Sriram
Ultra-Conductors
EXTRACTING MAXIMAL FREQUENCY RESPONSE POTENTIAL IN CONTROLLABLE LOADS
The Grid FriendlyTM Appliance (GFA) controller, developed at Pacific Northwest National Laboratory, was originallydesigned to autonomously switch off appliances by detecting under-frequency events. In this paper, the feasibility of usingthe GFA controller to provide primary frequency response is investigated. In particular, the impacts of an important designparameter, i.e., curtailing frequency threshold, on the primary frequency response are carefully analyzed for different situations. In the normal situation, the current method of selecting curtailing frequency thresholds for GFAs is found to be insufficient to guarantee the desired performance especially when the frequency deviation is shallow. In the extreme situations, the power reduction of online GFAs could be so excessive that it can even impact the system frequency negatively. As the first step towards the efforts to make GFAs suitable for providing primary frequency response, the existing controller design is improved by modifying the strategy of selecting curtailing frequency thresholds to ensure the effectiveness of GFAs in the normal situation.
FREQUENCY THRESHOLD DETERMINATION FOR FREQUENCY-RESPONSIVE LOAD CONTROLLERS
The Grid FriendlyTM Appliance (GFA) controller, developed at Pacific Northwest National Laboratory, was originallydesigned to autonomously switch off appliances by detecting under-frequency events. In this paper, the feasibility of usingthe GFA controller to provide primary frequency response is investigated. In particular, the impacts of an important designparameter, i.e., curtailing frequency threshold, on the primary frequency response are carefully analyzed for different situations. In the normal situation, the current method of selecting curtailing frequency thresholds for GFAs is found to be insufficient to guarantee the desired performance especially when the frequency deviation is shallow. In the extreme situations, the power reduction of online GFAs could be so excessive that it can even impact the system frequency negatively. As the first step towards the efforts to make GFAs suitable for providing primary frequency response, the existing controller design is improved by modifying the strategy of selecting curtailing frequency thresholds to ensure the effectiveness of GFAs in the normal situation.
Deng Receives ASME Fellowship and Career Achievement Award
Zhiqun (Daniel) Deng, Lab Fellow at PNNL, has been named a fellow of the American Society of Mechanical Engineers, an honor that recognizes outstanding engineering achievements.