A Simple Approach to Prepare Metal Oxides Supra-Structures for LIBs

Abstract

A variety of materials have been investigated as potential electrode materials for LIBs. Electrodes including Fe, Co, Ni or Cu have more Lithium ion storage capacity (more than 600 mAh/g) comparing to graphite (about 372 mAh/g). Recently, much effort has been focused toward achieving 3-dimensional hollow spheres with high surface area and porous for better capacity performance. In this study a simple spray drying approach has been introduced to synthesize porous CuO and Co3O4 microspheres. The results revealed that uniform structures of the nanoparticles microspheres were achieved. Then their cyclic performance were analyzed and compared to their commercial counterparts. The porous CuO microspheres and Co3O4 microspheres exhibited high capacity retention (86.2% of the discharge capacity of the second cycle after 60 cycles) and (89.8% of the discharge capacity of the second cycle after 40 cycles) at a current density of 400 mA/g, respectively. The excellent electrochemical properties could be attributed to their unique porous structures. The electrochemical results showed that microspheric electrode materials are able to manifest superior electrochemical properties compared to their commercial counterparts.

Why Should Children Become Familiar with Nature

“…These experts believe that arousal of children can play an important role in protecting the environment, which is already extremely vulnerable and fragile and requires serious attention. The environmental education for children acts as an eff ective protective lever, and parents should note that they should not be in any way instructed to educate the child [33][34][35][36]. For example, if you want your child to consume less electricity and turn off the light bulbs when leaving the room, take the time to explain why this is necessary [37].…”

Simple Synthesis of K4Nb6O17/C Nanosheets for High-Power Lithium-Ion Batteries with Good Stability

“…However, commercial graphite is hard to adapt to the demand of widely application duo to the slow Li + diffusion rate and the formation of solid electrolyte interface (SEI) [9]. To solve the above-mentioned problem of commercial graphite anode, different electrode materials, for instance, multifarious carbon materials [10], mixed metal oxides [11], conducting polymers [12], et al have been widely used as LIBs electrode materials. Unfortunately, the ion and electron transport paths of these materials are too long to achieve the desired results.…”