The Use of Spray-Dried Mn3O4/C Composites as Electrocatalysts for Li–O2 Batteries
AbstractThe electrocatalytic activities of Mn3O4/C composites are studied in lithium–oxygen (Li–O2) batteries as cathode catalysts. The Mn3O4/C composites are fabricated using ultrasonic spray pyrolysis (USP) with organic surfactants as the carbon sources. The physical and electrochemical performance of the composites is characterized by X-ray diffraction, scanning electron microscopy, particle size analysis, Brunauer–Emmett–Teller (BET) measurements, elemental analysis, galvanostatic charge–discharge methods and rotating ring-disk electrode (RRDE) measurements. The electrochemical tests demonstrate that the Mn3O4/C composite that is prepared using Trition X-114 (TX114) surfactant has higher activity as a bi-functional catalyst and delivers better oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalytic performance in Li–O2 batteries because there is a larger surface area and particles are homogeneous with a meso/macro porous structure. The rate constant (kf) for the production of superoxide radical (O2•−) and the propylene carbonate (PC)-electrolyte decomposition rate constant (k) for M3O4/C and Super P electrodes are measured using RRDE experiments and analysis in the 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF6)/PC electrolyte. The results show that TX114 has higher electrocatalytic activity for the first step of ORR to generate O2•− and produces a faster PC-electrolyte decomposition rate. View Full-Text
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Yang, H.-K.; Chin, C.-C.; Chen, J.-S. The Use of Spray-Dried Mn3O4/C Composites as Electrocatalysts for Li–O2 Batteries. Nanomaterials 2016, 6, 203.
Yang H-K, Chin C-C, Chen J-S. The Use of Spray-Dried Mn3O4/C Composites as Electrocatalysts for Li–O2 Batteries. Nanomaterials. 2016; 6(11):203.Chicago/Turabian Style
Yang, Hong-Kai; Chin, Chih-Chun; Chen, Jenn-Shing. 2016. "The Use of Spray-Dried Mn3O4/C Composites as Electrocatalysts for Li–O2 Batteries." Nanomaterials 6, no. 11: 203.