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8. In situ fabrication of flaky-like NiMn-layered double hydroxides as efficient catalyst for Li-O2 battery

Author

Hou Xuedan, Qian Wang, Guo Shouwu, Xiaofei Wang, and Wanyin Ge

Subjects
Battery (electricity), Materials science, 02 engineering and technology, engineering.material, Overpotential, 010402 general chemistry, Electrochemistry, 01 natural sciences, Catalysis, law.invention, chemistry.chemical_compound, law, General Materials Science, Electrical and Electronic Engineering, Layered double hydroxides, Carbon black, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Cathode, 0104 chemical sciences, Chemical engineering, chemistry, engineering, Hydroxide, 0210 nano-technology
Abstract

Layered double hydroxide (LDH)-based catalysts have emerged as one of the most promising catalysts due to their unique layered structure, compositional flexibility, low cost, and easy synthesis. Herein, NiMn-LDH was in situ incorporated with carbon black (CB) via a facile hydrothermal method, and the morphology of the LDHs tended to be small-sized flaky-like from large bulk flower-like with the increasing amount of CB. The fabricated 50CB/NiMn-LDH cathode tended to induce the poorly crystalline film–like Li2O2 to form, indicating the significant effect of NiMn-LDH flake on the surface redox reaction. The lithium-oxygen (Li-O2) battery with 50CB/NiMn-LDH cathode exhibited improved capacity output (5684 vs 2682 mAh g−1), low overpotential (1.49 vs 1.62 V), and stable cyclability (35th vs 15th). The present synthetic strategy is very simple and low cost and can be easily extended to other LDH-based materials with significant effect.

Published
2019
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11. In situ fabrication of flaky-like NiMn-layered double hydroxides as efficient catalyst for Li-O2 battery.

Author

Wang, Xiaofei, Hou, Xuedan, Wang, Qian, Ge, Wanyin, and Guo, Shouwu

Subjects
LAYERED double hydroxides, HYDROXIDES, CATALYSTS, ELECTRIC batteries, CARBON-black, SURFACE reactions
Abstract

Layered double hydroxide (LDH)-based catalysts have emerged as one of the most promising catalysts due to their unique layered structure, compositional flexibility, low cost, and easy synthesis. Herein, NiMn-LDH was in situ incorporated with carbon black (CB) via a facile hydrothermal method, and the morphology of the LDHs tended to be small-sized flaky-like from large bulk flower-like with the increasing amount of CB. The fabricated 50CB/NiMn-LDH cathode tended to induce the poorly crystalline film–like Li2O2 to form, indicating the significant effect of NiMn-LDH flake on the surface redox reaction. The lithium-oxygen (Li-O2) battery with 50CB/NiMn-LDH cathode exhibited improved capacity output (5684 vs 2682 mAh g−1), low overpotential (1.49 vs 1.62 V), and stable cyclability (35th vs 15th). The present synthetic strategy is very simple and low cost and can be easily extended to other LDH-based materials with significant effect. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
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