Performance evaluation of carbon/PrBaCo2O5+δ composite electrodes for Li–O2 batteries |
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| Authors: | Xingyu Pan Xingbao Zhu Jin Qin Yuanguo Wu Weihua Wan Ting Chen Yu Wang Zining Man Zhe Lü |
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| Affiliation: | 1. School of Physics, Harbin Institute of Technology, Harbin, 150080, PR China;2. National New Energy Vehicle Technology Innovation Center, Beijing, 102600, PR China;3. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150080, PR China;4. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150000, PR China;5. State Key Laboratory of Advanced Chemical Power Sources, Zunyi, 563000, PR China |
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| Abstract: | Herein, a new type of perovskite oxide PrBaCo2O5+δ (PBCO) was synthesized and optimized by cooperating with carbon nanotubes (CNT) or carbon nanoparticles (BP2000), which was further applied into Li–O2 battery cathode as a bi-functional cathode catalyst, achieving a high discharge capacity of 15.1 mA h, the number of which is over four times than that of single PBCO or CNT cathode, and seven times than single BP2000 cathode. Furthermore, a significantly enhanced stability was achieved as sustained more than 290 cycles at a fixed capacity, the number of which exceeds most carbon-based and even other perovskite catalytic Li–O2 batteries. The charge transfer resistance (Rct) of PBCO was reduced 46.6% after cooperating with carbon materials, which is almost half of single PBCO. All these results demonstrated that the big defect of PBCO can be remedied through the surface decorating with electronic conductors, such as, carbon nano-materials, and thus resulting in a substantially enhanced cathodic performance. |
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| Keywords: | Lithium–air batteries Bi-functional catalyst Surface coating Perovskite |
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