Gelatin-derived N-doped porous carbons (GPCs) with a large pore volume were synthesized by a method combining templating, freeze-drying and carbonization, using amino acid rich gelatin as the carbon and nitrogen sources, and silica sol and ice as the templates. The pore volume of the GPCs was regulated by adjusting the mass ratio of the silica sol to ice. Lithium polysulfide (LiPS) adsorption experiments show that the materials have a strong chemisorption for LiPSs. Electrochemical measurements show that N-doping accelerates the sulfur reduction kinetics and inhibits the shuttling of LiPSs. In addition, the larger the pore volume of the GPC, the better the cycling stability of the sulfur cathode. A highly N-doped (7.00%) GPC with a pore volume of 2.98 cm³ g⁻¹ could adsorb a high sulfur content of 78.4% and had a high sulfur utilization rate. Its composite with sulfur as a cathode material gave a high initial specific capacity of 1384 mAh g⁻¹ at 0.1 C, which dropped to 608 mAh g⁻¹ after 100 cycles.

以富氨基酸的明胶为碳源和氮源，以硅溶胶和冰为模板，通过模板化，冷冻干燥和碳化相结合的方法，合成了具有大孔体积的明胶来源的N掺杂多孔碳（GPC）。 。通过调节硅溶胶与冰的质量比来调节GPC的孔体积。多硫化锂（LiPS）的吸附实验表明，该材料对LiPS具有很强的化学吸附作用。电化学测量表明，氮掺杂加速了硫的还原动力学并抑制了LiPS的穿梭。另外，GPC的孔体积越大，硫阴极的循环稳定性越好。高N掺杂（7.00％）GPC，孔体积为2.98 cm ³ g ^-1可以吸收78.4％的高硫含量，并具有较高的硫利用率。其以硫为正极材料的复合材料在0.1 C下具有1384 mAh g ^-1的高初始比容量，在100次循环后下降至608 mAh g ^-1。