  The increasing need for portable and large-scale energy storage systems
requires development of new, long lasting and highly efficient battery systems.
Solid state NMR spectroscopy has emerged as an excellent method for
characterizing battery materials. Yet, it is limited when it comes to probing
thin interfacial layers which play a central role in the performance and
lifetime of battery cells. Here we review how Dynamic Nuclear Polarization
(DNP) can lift the sensitivity limitation and enable detection of the
electrode-electrolyte interface, as well as the bulk of some electrode and
electrolyte systems. We describe the current challenges from the point of view
of materials development; considering how the unique electronic, magnetic and
chemical properties differentiate battery materials from other applications of
DNP in materials science. We review the current applications of exogenous and
endogenous DNP from radicals, conduction electrons and paramagnetic metal ions.
Finally, we provide our perspective on the opportunities and directions where
battery materials can benefit from current DNP methodologies as well as project
on future developments that will enable NMR investigation of battery materials
with sensitivity and selectivity under ambient conditions.
