M4-NUWC Overview Fontaine.pdf

A
outlet
Electrolyte Flow
Reference Electrode
Development of Nano/ Microstructured
Electrodes for Increased Performance
of Electrochemical Energy Sources
Counter Electrode
Technical Approach:
B
100 µm
Working electrode
electrolyte
inlet
Inert
laminar flow
plate
•Quantify Mass transport coefficient, Km, •Characterize the effects of:
-fiber density, fiber length, surface roughness
K m
= (D/ δ L
) = I L
AnFC B
D =Diffusion Coefficient
δL =Boundary Layer
Thickness
IL =Limiting Current
A =Active Surface Area
n =# of Electrons Transferred
F =Faraday’s constant
CB =Bulk concentration of
electroactive species
Objectives:
•Engineer a general, broad-range solution to increasing
battery and fuel cell performance across many systems
•Achieve this by focusing on enhancing the mass transfer of
a high efficiency electrode
•Understand/ Define operating parameters for NUWC’s
Carbon Microfiber Array (CMA) Electrode
•Tailor CMA for specific applications depending on energy
and power requirements
Payoff:
•Increase Range and Duration of Stealth Missions that are
Energy Limited such as:
-Sea Based Sensors
-Undersea Distributed Network Systems
-Unmanned Undersea Vehicles
Investigators:
Christian Schumacher, MS
Charles Patrissi, PhD
Funding:
ILIR (FY07) $100K
ILIR (FY08) $100K
ILIR (FY08) $100K