tailieunhanh - Synthesis of Ag2O CNTs nanocomposite to be used as a cathode material for zinc - silver batteries

In this article, Ag2O/carbon nanotubes (CNTs) nanocomposite has been prepared by chemical reduction method and used as a cathode material for zinc-silver batteries. The transmission electron microscopy (TEM) tests reveal the CNTs and Ag2O nanotubes form an interpenetrating network structure. | Vietnam Journal of Science and Technology 56 (2A) (2018 ) 149-155 SYNTHESIS OF Ag2O/CNTs NANOCOMPOSITE TO BE USED AS A CATHODE MATERIAL FOR ZINC - SILVER BATTERIES Nguyen Van Tu1, 2 *, Abdul Hakim Shah3, Mai Van Phuoc1 1 Institute of Chemistry and Material, 17 Hoang Sam Street, Nghia Do Ward, Cau Giay District, Ha Noi, Viet Nam 2 School of Material Science and Engineering, Wuhan University of Technology 122 Luoshi Road, Wuhan, P. R. China 3 Department of Physics, Khushal Khan Khattak University, Karak, Pakistan * Email: nguyenvantu882008@ Received: 08 April 2018; Accepted for publication: 14 May 2018 ABSTRACT In this article, Ag2O/carbon nanotubes (CNTs) nanocomposite has been prepared by chemical reduction method and used as a cathode material for zinc-silver batteries. The transmission electron microscopy (TEM) tests reveal the CNTs and Ag2O nanotubes form an interpenetrating network structure. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis confirmed that the Ag2O shows Cubic (Pn-3) crystal structure and mixture element states in the nanocomposite. The charging/discharging property of the Ag2O/CNTs nanocomposite was studied by galvanostatic charge-discharge measurement as a cathode material. The results indicated that Ag2O/CNTs nanocomposite has high specific capacity and good cycling stability. For the current density of mA/cm2 (), the initial specific capacity of the nanocomposite is 190 mAh/g and remains 172 mAh/g after 20 cycles. Keywords: silver oxide, silver nanocomposite, zinc-silver battery, cathode material. 1. INTRODUCTION Zinc-silver oxide batteries are under investigation of researchers since long. However, enhancement in the battery properties is a challenging and continuous run of the research community. Zinc-silver batteries are used in military and aerospace applications due to their unique properties such as stability, large currents and being of highly safety [1-2]. Envisage of .