关键字：PERFORMANCE; SUPERCAPACITORS; DESIGN

摘要：Owing to the limitation of the diffusion rate of electrolyte ions, the two key parameters of energy density and power density of energy storage devices seem contradictory, and the construction of "double-high" electrode materials is the key challenge in the electrochemical energy storage field. To achieve outstanding capacity retention at high charging/discharging current density, a hierarchical porous amorphous bismuth oxide anode (A-Bi2O3) was constructed via an ion-exchange strategy using a Bi-based metal-organic framework as the precursor. Under a suitable alkaline solution, organic anions will be gradually substituted by OH- anions to form rich mesoporous channels, and the residual ligand can fix or functionalize the as-formed BiOx crystallites to form amorphous configuration, which provides tree vein-like channels for fast and deep electrolyte ion feeding. Therefore, the optimized A-Bi2O3 cathode presents a high capacity of 319.6 mA h g-1 at 1 A g-1 and excellent retention rate of 83.7% when the current density was increased to 30 A g-1. Furthermore, the fabricated H-Ni(OH)2//A-Bi2O3 aqueous alkaline battery (AAB) shows a high energy density of 104.58 W h kg-1 at 0.24 kW kg-1 and can make an electronic thermometer work for 30 min with a charging of several seconds. In this study, the double-high hierarchical porous amorphous Bi2O3 anode material (HPAM Bi2O3) is firstly synthesized by ion exchange strategy via employing Bi-BTC nanorod as the precursor.

卷号：11

期号：19

是否译文：否