Enhancing the Catalytic Activity of Co3 O4 Nanosheets for Li-O2 Batteries by the Incoporation of Oxygen Vacancy with Hydrazine Hydrate Reduction

Inorganic Chemistry
Rui GaoXiangfeng Liu

Abstract

Li-O2 battery attracts great interest because of the high energy density. But the poor kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have blocked the practical application. Designing the efficient bifunctional cathode catalysts is of great importance for the Li-O2 battery. Tuning the electronic and surface structure of the catalysts plays an important role. Herein, we propose to enhance the catalytic performance of Co3O4 nanosheets for rechargable Li-O2 batteries by hydrazine hydrate-induced oxygen vacancy formation. The hydrazine hydrate reduction not only introduces oxygen vacancies into Co3O4 nanosheets and modulates the electronic structure but also roughens the surface, which all contribute to the enhancement of ORR and OER activity, especially the activity and stability for OER. Li-O2 cells catalyzed by the oxygen defects-enriched Co3O4 ultrathin nanosheets exhibit much better electrochemical performances in terms of the high initial capacity (∼11 000 mAh g-1), the lower overpotential (∼1.1 V), and the longer cycle life (150 cycles@200 mA g-1). This can be largely attributed to the synergy of the enriched oxygen vacancies and the roughened surface of Co3O4 nanosheets, which not only i...Continue Reading

References

May 24, 2011·Angewandte Chemie·Zhangquan PengPeter G Bruce
Dec 16, 2011·Nature Materials·Peter G BruceJean-Marie Tarascon
Jan 29, 2013·Angewandte Chemie·Fangyi ChengJun Chen
Apr 15, 2014·Chemical Reviews·Jun LuKhalil Amine
Sep 13, 2014·Journal of the American Chemical Society·Tian Yi MaShi Zhang Qiao
Jun 23, 2015·Chemical Communications : Chem Comm·Kaixiang LeiJun Chen
Jan 3, 2013·The Journal of Physical Chemistry Letters·Yi-Chun Lu, Yang Shao-Horn
Oct 22, 2015·Nature Communications·Huilong FeiJames M Tour
Dec 29, 2015·Journal of the American Chemical Society·Hsin-Yi WangBin Liu
Jan 12, 2016·Nature·Jun LuKhalil Amine
Dec 21, 2016·Nature Materials·C P Grey, J M Tarascon
Apr 19, 2017·Chemical Society Reviews·Hee-Dae LimKisuk Kang
Apr 21, 2017·ACS Applied Materials & Interfaces·Farhad MohazabradXianglin Li
May 17, 2017·Advanced Materials·Dafeng YanShuangyin Wang

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Citations

Jan 14, 2020·Advanced Materials·Yiqiong ZhangShuangyin Wang

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