Conjugated Microporous\nPolymer/TiS<sub>2</sub> Composite\nCathode for High-Performance Lithium-Rechargeable Batteries

Conjugated microporous polymers (CMPs) rank among the\nmost promising\nmaterials for sustainable lithium-ion batteries (LIBs) in terms of\ntheir tunable chemical structures and designable electrochemical performance.\nHerein, a CMP of poly(anthraquinone-<i>co</i>-hexaazatriphenylene)\n(PAQ-HATN) was synthesized by combining anthraquinone (AQ) with a\nhighly active hexaazatriphenylene (HATN) group, which is endowed with\nabundant redox-active groups, high specific surface area, and insolubility\nin an electrolyte. Further, to address the existing problems of PAQ-HATN,\nincluding poor rate performance, low conductivity, and structural\ninstability, the strategy through the integration of an organic polymer\n(PAQ-HATN) with inorganic material (TiS<sub>2</sub>) was used. The\nprepared composite as a cathode material (PAQ-HATN@TiS<sub>2</sub>) achieves improved conductivity and effective utilization of the\nredox activity sites. As expected, PAQ-HATN@TiS<sub>2</sub> exhibits\nhigh initial capacity (347.6 mA h g<sup>–1</sup> at 25 mA g<sup>–1</sup>), good rate performance (114.8 mA h g<sup>–1</sup> at 1000 mA g<sup>–1</sup>), and long cycle stability (157.4\nmA h g<sup>–1</sup> at 800 mA g<sup>–1</sup> and 1000th\ncycle), indicating the PAQ-HATN@TiS<sub>2</sub> compound is a potential\ncathode for energy storage.