Inside Back Cover: Phase-Pure P2-Na0.7(1−x
)
[Li
x
Mn1−x
]Oδ
as a Cathode Material for Na-Ion Batteries (ChemElectroChem 6/2017) (Inside Back Cover: Phase-Pure P2-Na0.7(1−x ) [Li x Mn1−x ]Oδ as a Cathode Material for Na-Ion Batteries (ChemElectroChem 6/2017))