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A novel indirect charging system that uses a redox mediator was demonstrated for Li–O2 batteries. 4-Methoxy-2,2,6,6-tetramethylpiperidinyl-1-oxyl (MeO-TEMPO) was applied as a mediator to enable the oxidation of Li2O2, even though Li2O2 is electrochemically isolated. This system promotes the oxidation of Li2O2 without parasitic reactions attributed to electrochemical charging and reduces the charging time. [ABSTRACT FROM AUTHOR]

The conduction of the bivalent magnesium cation, Mg2+, in an inorganic solid state material, Mg(BH4)(NH2), has been demonstrated. This material exhibited a high ionic conductivity of 10−6 S cm−1 at 150 °C, and its electrochemical window was estimated to be approximately 3 V using cyclic voltammetry. [ABSTRACT FROM AUTHOR]

We propose a catalytic cycle using the iodine–dimethylsulfoxide (I2–DMSO) complex for the realization of secondary Mg–O2 batteries. We have demonstrated that the Mg–O2 battery incorporating an I2–DMSO complex electrolyte showed evidence of being rechargeable. [ABSTRACT FROM AUTHOR]

Precise knowledge of the discharge and charge reactions within Li–O2 batteries is an important aspect of developing highly efficient, rechargeable Li–O2 cells. We describe an analytical method capable of determining the quantity of Li2O2 in the cathode on the basis of the reaction of Li2O2 with an oxoammonium salt. [ABSTRACT FROM AUTHOR]

A new gas-utilizing battery using mixed gas of O2and CO2was developed and proved its very high discharge capacity. The capacity reached three times as much as that of a non-aqueous Li–air (O2) battery. The unique point of the battery is expected to be the rapid consumption of superoxide anion radical by CO2as well as the slow filling property of the Li2CO3in the cathode. [ABSTRACT FROM AUTHOR]