Preparation and Electrochemical Performance of Polycrystalline and Single Crystalline CuO Nanorods as Anode Materials for Li Ion Battery

Abstract

A simple and efficient approach is developed for the synthesis of copper oxide nanorods with different morphology and crystallographic structure. Polycrystalline fine rods 10−20 nm thick and several hundred nanometers long and single crystalline thick rods 60−100 nm thick and up to 1 μm long were obtained from the reactions of copper hydrate with caustic soda solution at room temperature and 100 °C, respectively. The fine CuO nanorods as anode materials for Li ion battery exhibit a high electrochemical capacity of 766 mA h/g and relatively poor capacity retention as compared to thick nanorods with the single crystalline structure. The correlation between the structural features of the nanorods and their electrode performance is discussed in detail.

Microemulsion Synthesis of Copper Oxide Nanorod-Like Structures

“…It couples a narrow band gap (Eg = 1.2 eV -1.8 eV) [10][11][12] with a set of properties such as high-temperature superconductivity and good photoconductivity and photochemical properties [13]. This largely explains the growth of applications in the last years in the more diverse fields such as solar cells [14], gas sensors [15], field emission (FE) emitters [16], and lithium ion battery electrode materials [17].…”

Emergent methods to synthesize and characterize semiconductor CuO nanoparticles with various morphologies – an overview

“…TEM images of Cu(OH) 2 precipitates dried at 100 C (a) and as-prepared nanorods at room temperature (b) and 100 C (c). The selected area electron diffraction of the as-prepared nanorods is inserted [31]. nanorods were highly dependent on temperature and caustic soda present in autoclaves.…”

“…The CuO nanorods form here via two steps as shown below: Here also, the nonionic surfactant (PEG) acts as a template which plays an important role in controlling the CuO shape. Similarly, Gao et al [31] synthesized CuO nanorods starting from CuCl 2 as follows. First, Cu(OH) 2 precipitates were prepared by mixing 0.5 M solution of both CuCl 2 and NaOH.…”

Effect of Ultrasonic‐assisted Preparation Methods on Structure, Morphology and Optical Properties of Nanosized Cupric Oxide

“…For rechargeable batteries, a copper oxide electrode has been found to have high capacity density and good capacity retention for lithium insertion and extraction. [4][5][6][7][8][9][10] Furthermore the large fraction of surface area, excellent stability, low production cost and good electronic properties make nanosized CuO as a suitable compound for new studies to determine its applicability as a material of solar cells, in particular due to its photoconductivity and photochemical properties. [2][3][4][5][6][7][8][9][10][11][12][13] In addition, metal oxides such as CuO may be particularly valuable antimicrobial agents as they can be prepared with extremely high surface areas.…”