Synthesis and characterization of carbon black/manganese oxide air cathodes for zinc–air batteries: Effects of the crystalline structure of manganese oxides
作者： Po-Chieh Li , Chi-Chang Hu , Hiroyuki Noda , Hiroki Habazaki
DOI: 10.1016/J.JPOWSOUR.2015.08.051
关键词:
摘要: Abstract Manganese oxides (MnOx) in α-, β-, γ-, δ-MnO2 phases, Mn3O4, Mn2O3, and MnOOH are synthesized for systematically comparing their electrocatalytic activity of the oxygen reduction reaction (ORR) Zn–air battery application. The optimal MnOx/XC-72 mass ratio ORR is equal to 1 oxide crystalline structure effect on compared. order composites with respect decreasing is: α-MnO2/XC-72 > γ-MnO2/XC-72 > β-MnO2/XC-72 > δ-MnO2/XC-72 > Mn2O3/XC-72 > Mn3O4/XC-72 > MnOOH/XC-72. textural properties MnOx investigated by scanning electron microscopy (SEM), transmission (TEM), N2 adsorption/desorption isotherms Brunauer–Emmett–Teller (BET) analysis, X-ray diffraction (XRD), thermogravimetric analysis (TGA). Electrochemical studies include linear sweep voltammetry (LSV), rotating ring-disk electrode (RRDE) voltammetry, full-cell discharge test. peak power density batteries varies from 61.5 mW cm−2 (α-MnO2/XC-72) 47.1 mW cm−2 (Mn3O4/XC-72). maximum 102 mW cm−2 an air cathode containing α-MnO2/XC-72 under atmosphere when carbon paper 10AA. specific capacity all tests higher than 750 mAh g−1 at current densities.
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