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A high concentration gel polymer electrolyte (GPE) was prepared by simply using LiFSI–LiNO3 dissolved in 1,3-dioxolane. The Li‖Li cell achieves stable battery cycling for over 3200 h. Furthermore, the Li‖Cu cell demonstrates a high CE of 99.2%. Even at a high current density of 8 mA cm−2, a high CE of 98.5% was still achieved. Notably, in a Li‖LiFePO4 cell, this electrolyte enables high capacity retention of 94.5% and an average CE of 99.8% over 500 cycles, showing promising prospects for high-performance lithium metal batteries. [ABSTRACT FROM AUTHOR]

An air-stable Na0.67Mn0.7Cu0.15Ti0.15O2 (NMCT) has been synthesized using a solid-state method. It displays a reversible capacity of 170 mA h g−1 and a capacity retention of 82.5% after 300 cycles. NMCT also exhibits good structural stability upon electrochemical de/intercalation processes as observed by operando XRD. And the result shows that the unit-cell volume change of NMCT during the whole process of Na+ de/intercalation is only 3.2%. These data indicate that NMCT is a promising cathode material for sodium ion batteries (SIBs). [ABSTRACT FROM AUTHOR]

Ordered mesoporous TiC–C (OMTC) composites were prepared and served as catalysts for nonaqueous Li–O2 batteries. The OMTC cathodes showed high specific capacity, low overpotential and good cyclability. Furthermore, the reaction mechanism of Li–O2 batteries during charge and discharge processes was investigated extensively by XRD, XPS and in situ GC-MS methods. [ABSTRACT FROM AUTHOR]

A practicable strategy has been developed to build a LixSi–O2 battery using an in situ formed Li–Si alloy anode based on the decomposition of Li3N pre-loaded in the cathode. The LixSi–O2 battery has achieved more than 100 stable charge–discharge cycles with lower polarization than that using a lithium metal anode. [ABSTRACT FROM AUTHOR]