Damage in composite NiMH positive electrodes

Article Abstract:

Mechanical and resistivity experiments were conducted on nickel metal hydride batteries to examine mechanical degradation in their fibrous composite positive electrodes. The mechanical properties of the dry substrate materials were measured before and after battery cycling. Results show that higher volume fraction material is more sensitive to cycling with respect to resistivity, while lower volume fraction is more sensitive to cycling with respect to modulus.

Electrodes, Mechanical wear, Wear (Materials science)

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Investigation of failure processes in porous battery substrates: simulation results and comparisons, part II

Article Abstract:

In this article nickel-metal hydride battery substrate microstructure data are used in generating numerical models to understand transport and mechanic aspects of materials. A simplified approximation of the porous/powder nickel network microstructure with simulation geometry of porous fiber network is presented.

Usage, Simulation methods, Simulation

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Investigation of failure processes in porous battery substrates: experimental findings, part I

Article Abstract:

Results show that porous battery substrates on electrochemical cycling undergo mechanical and morphological changes with concomitant changes in the coupled transport properties affecting conduction in substrates.

Electrochemical analysis

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