Na-ion battery (NIB) is an attractive alternative to Lithium-ion battery for large-scale storage because Na is abundant and inexpensive. However, poor capacity retention with cycling of NIB is still a bottleneck for applications. One of the main issues is the structural stability of the metal oxide cathode materials. In the latest work by Dr. Denis Yu and his group, they discovered that by incorporating Li into Na0.7MnO2, the distortion within the material structure can be eliminated, thus improving its long-term cycle performance. The work was highlighted as the back cover of ChemElectroChem.