Covalent-organic frameworks: potential host materials for sulfur impregnation in lithium–sulfur batteries

Abstract

We report, for the first time, construction of a sulfur electrode in a lithium–sulfur battery by using covalent-organic frameworks (COFs) as a host.

Metal-organic frameworks-derived mesoporous carbon for high performance lithium–selenium battery

“…To meet the increasing demand of high capacity energy storage systems, recently there has been intensive research on lithium-sulfur (Li-S) batteries due to their high theoretical capacity of 1672 mAh g À1 and energy density (2600 Wh kg À1 ) [1][2][3]. However, Li-S battery, whose cathode active materialssulfur with low electronic conductivity, suffers from the solubility of intermediate lithium polysulfide species during cycling, which causes the so-called redox shuttle effect, thus leading poor cycle life [4,5].…”

Two-dimensional porphyrin- and phthalocyanine-based covalent organic frameworks

“…Due to 12 their permanent porosity, structural periodicity and high thermal 13 stability, COFs have triggered substantial research interest over the 14 past decade for potential applications in gas storage and separation 15 [4][5][6][7][8][9], catalysis [10,11], sensing [12,13], optoelectronic devices 16 [14,15] and energy storage [16][17][18]. Two-dimensional (2D) COFs, 17 in which the 2D polymer sheets stack in a columnar manner to 18 form a layered eclipsed structure [19], provide a unique means to 19 construct ordered p systems for efficient charge carrier transport 20 through the framework and have potential for developing new p- 21 electronic and photofunctional materials [20]. Therefore, once 22…”

Conversion of amorphous polymer networks to covalent organic frameworks under ionothermal conditions: a facile synthesis route for covalent triazine frameworks

“…34 Finally, CTFs have been recently used for sensing applications 35 and as electrode materials in energy devices. [36][37][38][39][40] It should be noted that especially for the latter applications where conductivity of materials is an important issue, most oen amorphous "TTFs" (thermolyzed triazine frameworks) have been applied, for which dicyanocompounds are heated in ZnCl 2 to higher temperatures than 400 C, yielding partial carbonization of the networks.…”