Application of Fiber Biochar–MOF Matrix Composites in Electrochemical Energy Storage

Abstract

Fiber biochar–metal organic framework (MOF) composites were successfully prepared by three different biochar preparation methods, namely, the ionic liquid method, the pyrolysis method, and the direct composite method. The effects of the different preparation methods of fiber biochar on the physical and chemical properties of the biochar–MOF composites showed that the composite prepared by the ionic liquid method with the Zeolite-type imidazolate skeleton -67 (ZIF-67) composite after high temperature treatment exhibited a better microstructure. Electrochemical tests showed that it had good specific capacity, a fast charge diffusion rate, and a relatively good electrochemical performance. The maximum specific capacity of the composite was 63.54 F/g when the current density was 0.01 A/g in 1 mol/L KCl solution. This work explored the preparation methods of fiber biochar–MOF composites and their application in the electrochemical field and detailed the relationship between the preparation methods of the composites and the electrochemical properties of the electrode materials.

Metal‐Organic Framework Based Polymer Fibers: Review on Synthesis and Applications

“…When MOFs are dispersed on the fiber surface and embedded in the fiber, on the one hand, MOFs can adsorb gases, used for gas capture to remove harmful gases or store other gases, and also adsorb some particles in the air or filter heavy metal particles in water; [45,46] In addition, MOFs-fiber composites can catalyze many reactions quickly, and when MOFs capture some substances, they can transmit some signals, which can also be used in sensor-related aspects or the field of smart wear; [47,48] Finally the MOFs loading on the fiber surface can be controlled to control the surface energy of the material and thus regulate the hydrophobicity and oleophobicity of the overall composite, which can be used as a waterproof material. [49] MOFs-fiber composites can be used as electrode materials when dispersed inside the fibers, and some teams have used MOFs-fiber composites as battery electrodes to inhibit the growth of lithium dendrites; [50,51] MOFs-fiber composites can be used to control drug release by modulating the polymer, so their use as drug delivery is also a promising area of research. [52] When modified MOFs are combined with fibers, flame retardant fabrics can be made by adding flame retardants to MOFs, or antibacterial fabrics by adding antibacterial substances to MOFs.…”

Ionic Liquids Functionalized MOFs for Adsorption

“…IL/MOF composites have been attracting considerable interest for their various applications, including in adsorption separation, − ionic conduction, − heterogeneous catalysis, − electrocatalysis, − electrochemistry sensing, − photoelectrochemical response, , flame retardants, and functional material synthesis. , IL/MOF composites not only exhibit the properties of both the ILs and the MOFs but also present unique and synergistic functionalities. − Meanwhile, a large number of possible combinations between ILs and MOFs can be achieved to tailor the physicochemical properties of new IL/MOF composites. Besides, the rational design and proper functionalization of both ILs and MOFs are effective ways to perform excellent adsorptive separation.…”