A novel iron phosphate/oxygen hybrid cathode with high power output for the aprotic lithium-oxygen battery. (November 2017)

• Record Type: Journal Article
• Authors: Zhu, Ding; Li, Wei; Wang, Ting; Mu, Shijia; Ding, Zhendong; Zhang, Kaifang; Chen, Yungui
• Is Part Of: Materials research bulletin. Volume 95(2017)
• Page Start: 431
• Page End: 435
• Publication Date: 2017-11
• Subjects: FePO4 iron phosphate -- Li-O2 battery lithium-oxygen battery -- LiFePO4 lithium iron phosphate -- FOHC FePO4/O2 hybrid cathode -- OC O2 cathode -- ORR oxygen reduction reaction -- ηORR ORR cathodic polarization -- ηFP FePO4 cathodic polarization; A. Inorganic compounds -- C. Electrochemical measurements -- D. Electrochemical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.08.026
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: This study affords a new strategy to improve the power output of Li-O2 cell. FePO4 @C nanorods with exposed {010} facets are prepared and applied in O2 cathode. Hybrid cathode retains high energy output via ORR. Hybrid cathode attains 8-fold increased power output via Li + -insertion of FePO4 . Abstract: The aprotic lithium-oxygen (Li-O2 ) battery has recently attracted the worldwide attention by virtue of its super-large energy output. However, the extremely poor power output is one of the key issues which severely restrict the commercialization of the Li-O2 technology. In this work, we demonstrate a novel and simple strategy to address the power issue of the aprotic Li-O2 battery. An iron phosphate/oxygen (FePO4 /O2 ) hybrid cathode is proposed for the first time by simply introducing the {010}-oriented FePO4 nanorods into a conventional O2 cathode. The as-built hybrid cathode not only retains a high-energy output via the O2 cathodic reaction, but also achieves an 8-fold increased power output via the Li + -insertion reaction of the {010}-oriented FePO4 nanorods.