Multiphysics simulations (COMSOL) of core-shell nanoarchitectures show that they
can operate at 3 times the C-rate of micron scale thin film materials while
still accessing 90% of an additive free cathode oxide material. A high
performance Ge anode DC sputtered onto a Cu nanotube current collector is
characterised. Volume expansion of Ge is alleviated and mechanical stability is
enhanced due to the Cu nanotubes current collector.