The Synthesis Of Nano-AgO And Its Electrochemical Performance

Among aqueous batteries, Zn-Ag batteries have the highest specific energy. They have the advantage of high specific energy, high specific power, stable charge voltage and capability of high current density discharge, which the other batteries do not have. As the active material of Zn-Ag batteries, AgO attracts more and more attention of researchers.The present study has established a method to synthesize AgO. AgNO is oxidized by NaClO-NaOH. The best condition of this process is also discussed. XRD test, FSEM test and purity analysis test show that the prepared AgO is nano-AgO of high purity.In addition to the synthesis of nano-AgO, the electrochemical performance is studied. 9MKOH is used as electrolyte and graphite is used as electric conductor material. The discharge experiment results show that the high current density discharge ability of nano-AgO electrode is excellent even under a current density of 1A/g. The cyclic voltammetry(CV) test also shows its excellent electrochemical reversibility. The preparation technology of double electrode piece considerably reduces the dissolution of anode material, preventing the utilization ratio of active material from reduction.In order to study the influence of doping, nano-AgO is doped to MnO electrode. Electrolyte is also 9MKOH, while tubular nano-carbon material is used as electric conductor. The discharge tests of doped MnO electrode show that the best ratio of AgO to total anode active material is 10%. However, the charge and discharge tests of high current and the CV tests show that the high current density discharge ability of doped MnO is not very good, and the dope of nano-AgO neither prevents the discharge capacity of MnO electrode from attenuation, nor improves its rechargeability.