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Search Publications by: Jacob LaManna (Fed)

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Displaying 51 - 75 of 77

Critical Current Density as a Performance Indicator for Gas-Evolving Electrochemical Devices

August 26, 2020
Author(s)
Jason K. Lee, ChungHyuk Lee, Benzhong Zhao, Jacob LaManna, Eli Baltic, Daniel S. Hussey, David L. Jacobson, Aimy Bazylak
Reaching high current densities is absolutely imperative for electrochemical energy conversion, from fuel cells to CO2 reduction. Here, we identify the existence of a performance indicator for gas-evolving electrochemical energy conversion devices: the

Using Operando Techniques to Understand and Design Alkaline Membrane Fuel Cells with Excellent Performance and Long Operational Stability

July 16, 2020
Author(s)
Xiong Peng, Devashish Kulkarni, Ying Huang, Travis J. Omasta, Benjamin Ng, Yiwei Zheng, Lianqin Wang, Jacob LaManna, Daniel S. Hussey, John R. Varcoe, Iryna V. Zenyuk, William E. Mustain
Operando neutron imaging and operando micro X-ray computed tomography were used to understand the water dynamics of AEMFCs under various operating conditions, and this new fundamental information was used to create electrodes that not only enabled high

Reconciling temperature-dependent factors affecting mass transport losses in polymer electrolyte membrane electrolyzers

June 1, 2020
Author(s)
Jacob LaManna, Aimy Bazylak, ChungHyuk Lee, Jason K. Lee, Kieran F. Fahy, Eli Baltic, Daniel S. Hussey, David L. Jacobson
In this work, we investigated the impact of temperature on two-phase transport in low temperature (LT)-polymer electrolyte membrane (PEM) electrolyzer anode flow channels via in operando neutron imaging and observed a decrease in mass transport

Simultaneous Neutron and X-Ray Imaging of 3D Structure of Organic Matter and Fracture in Shales

April 1, 2018
Author(s)
Wei-Shan NMN Chiang, Jacob M LaManna, Daniel S. Hussey, David L. Jacobson, Yun Liu, Jilin Zhang, Daniel T. Georgi, Jordan R. Kone, Jin-hong Chen
Hydrocarbon production from shales using horizontal drilling and hydraulic fracturing has been the key development in the US energy industry in the past decade and has now become more important globally. Nevertheless, many fundamental problems related to

Neutron Interferometry Detection of Early Crack Formation in Fatigued Additively Manufactured SS316 Dogbones

February 15, 2018
Author(s)
Daniel S. Hussey, Hong Yao, Adam J. Brooks, Ali Haghshenas, Jumao Yuan, Caroline G. Lowery, Jacob M. LaManna, David L. Jacobson, Nikolay Kardjilov, Shengmin Guo, Michael M. Khonsari, Leslie G. Butler
Fatigue in selective laser melted (SLM) and conventional SS316 dogbones was studied with neutron imaging methods for attenuation, scattering, and diffraction. To detect the microcrack evolution in fatigued samples,two methods of grating-based neutron

Beyond Catalysis and Membranes: Visualizing and Solving the Electrode Water Challenge in AEMFCs

February 8, 2018
Author(s)
Daniel S. Hussey, Travis J. Omasta, Andrew M. Park, Jacob M. LaManna, Yufeng Zheng, Xiong Peng, Lianqin Wang, David L. Jacobson, John R. Varcoe, Bryan S. Pivovar, William E. Mustain
A majority of anion exchange membrane fuel cells (AEMFCs) reported in the literature have been unable to achieve high current or power. A recently proposed theory is that the achievable current is largely limited by poorly balanced water during cell

Influence of Substrate Moisture State and Roughness on Interface Microstructure and Bond Strength: Slant Shear vs. Direct Tension Testing

December 8, 2017
Author(s)
Dale P. Bentz, Igor de la Varga, Jose Munoz, Robert Spragg, Benjamin Graybeal, Daniel S. Hussey, David L. Jacobson, Scott Z. Jones, Jacob M. LaManna
There are conflicting views in the literature concerning the optimum moisture state for an existing substrate prior to the application of a repair material. Both saturated-surface-dry (SSD) and dry substrates have been found to be preferable to the other

Neutron and X-ray Tomography (NeXT) system for simultaneous, dual modality tomography

November 27, 2017
Author(s)
Jacob M. LaManna, Daniel S. Hussey, Elias M. Baltic, David L. Jacobson
Dual mode tomography offers the potential of improved estimation of the composition of a sample from the complimentary of the interaction of the two probes with the sample. We have developed a simultaneous neutron and 90 keV X-ray tomography system that is

Studying Water and Solute Transport through Desalination Membranes via Neutron Radiography

October 25, 2017
Author(s)
Devin L. Shaffer, Jacob M. LaManna, David L. Jacobson, Daniel S. Hussey, Menachem Elimelech, Edwin P. Chan
Neutron radiography, a non-destructive imaging technique, is applied to study water and solute transport through desalination membranes. Specifically, we use neutron radiography to quantify lithium chloride draw solute concentrations across a thin-film

Simultaneous Neutron and X-Ray Imaging of 3D Kerogen and Fracture Structure in Shales

June 17, 2017
Author(s)
Wei-Shan NMN Chiang, Jacob M LaManna, Daniel S. Hussey, David L. Jacobson, Yun Liu, Jilin Zhang, Daniel T. Georgi, Jin-hong Chen
Hydrocarbon production from shales using horizontal drilling and hydraulic fracturing has been the key development in US energy industry in the past decade and has now become more important globally. Nevertheless, many fundamental problems related to the