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- Title
Porous Urchin‐like Co<sub>3</sub>O<sub>4</sub> Microspheres as an Efficient Bifunctional Catalyst for Nonaqueous and Solid‐State Li−O<sub>2</sub> Batteries.
- Authors
Liu, Shengming; Zhang, Wenqiang; Sun, Chunwen; Chen, Ning
- Abstract
Abstract: Porous urchin‐like Co3O4 microspheres consisting of nanowires (NWs) have been obtained through a hydrothermal synthesis. This unique porous structure not only increases the number of active sites for reactions, but also provides more storage space for the discharge product Li2O2. When used as a cathode catalyst for Li−O2 batteries with nonaqueous electrolyte, the cell exhibits a much higher initial specific discharge capacity of 9013.1 mA h g−1, better rate capability and cycling stability. Furthermore, rechargeable solid‐state Li−O2 cells were prepared with a hybrid solid electrolyte (HSE) membrane composed of inorganic Li7La3Zr2O12 particles and PVDF‐HFP both as electrolyte and separator, and Co3O4‐NWs microspheres used as a catalyst for the air electrode. The solid‐state Li−O2 cell with this catalyst shows a high initial specific capacity of 8000 mA h g−1, close to that of the cell with liquid electrolyte. It also shows a better stability with low polarization.
- Subjects
POROUS materials; MICROSPHERES; BIFUNCTIONAL catalysis; NONAQUEOUS electrolytes; SOLID state chemistry
- Publication
ChemElectroChem, 2018, Vol 5, Issue 16, p2181
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.201800426