Structure controllable carbon matrix derived from benzene-constructed porous organic polymers for high-performance Li-S batteries

A kind of porous carbon material with tunable pore structure and morphology was successfully built up from a knitting based bottom-up method. This porous carbon material feature abundant porosity and remarkably high-efficiency restrain for the pore collapse after the pyrolysis process, namely, a specific surface area retention (SSRA) high up to 45% in the absence of pore forming agent. Based on this unique porous carbon material, further compositing with MWCNT can enhance its performance for Li-S batteries, specifically, 1 C for 631 mA h/g and 2 C for 574 mA h/g after 300 cycles, with capacity decay as low as only 0.104% and 0.07%, respectively, which may further open the opportunity for a new family of porous carbon materials with well-controlled structures and properties for high performance applications in energy conversion and storage fields.

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