Affiliation:
1. Yanshan University Hebei Key Laboratory of Applied Chemistry, Department of Applied Chemistry, College of Environmental and Chemical Engineering, , Qinhuangdao 066004 , China
Abstract
Abstract
The construction of advanced Fe2O3 materials with high energy density for energy storage faces challenges due to the defects of conventional widely known red-brown Fe2O3 such as poor electronic conductivity and insufficient physical/chemical stability. Unlike previous works, we successfully synthesized a novel black-Fe2O3 (B-Fe2O3) thin film electrode by adopting a simple hydrothermal strategy. Physical characterizations indicate that the as-made B-Fe2O3 product is composed of polyhedrons (mainly exhibit four to eight sides) with a micrometer grade size range. Besides, the Fe-based thin film electrode with this 3D structure has a stronger affinity and high electronic conductivity. As anode of aqueous solid-state energy storage devices, the as-synthesized B-Fe2O3 film electrode exhibits excellent volume energy density of 14.349 kWh m−3 at a power density of 1609 kW m−3, which is much higher than the best result of previous works (∼8 kWh m−3). This study may provide new insights into the development of the Fe2O3 series on developing high-efficiency Fe-based anode materials for solid-state energy storage.
Subject
Mechanical Engineering,Mechanics of Materials,Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials