Substantial interest exists in the development of lithium-ion battery cathodes with exceptional resistance to degradation. Cathode particles fracture during charging and discharging due to dimensional changes that accompany varying lithium occupancy.
This approach allows for the identification of microstructural properties that dictate the mechanical properties of LIB cathode materials. Substantial interest exists in the development of lithium-ion battery cathodes with exceptional resistance to degradation.
Raj has highlighted the importance of fully understanding the creep behaviour of lithium for solid state batteries by suggesting a linear relationship based on dislocation motion between stack pressure and current density that delineates when batteries will fail .
Mechanochemical degradation processes such as the fracture of cathode particles play a major role in limiting the service life of advanced lithium-ion batteries (LIBs).
Metallic lithium is the desired anode material for high energy density solid state batteries and shows a factor of four range in elastic modulus and two orders of magnitude difference in creep properties dependent on sample preparation and testing method.
The lithium metal mechanical properties also have some importance for Li-ion systems where metal is platted during cycling as the incompressibility of nanoscale platted lithium can lead to irreversible cell thickness increases .
It has been suggested that this is due to the mechanical behaviour of lithium given the experimental link between these failure mechanisms and the applied stack pressure, which has lead to a renewed interest in characterising the alkali metal,,,,, .
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