This work explores the fabrication of Co/Co₃O₄ nanoparticles encapsulated in nitrogen-doped hierarchically ordered porous carbon (Co/Co₃O₄/NHPC) and investigates their electrochemical performance for lithium-ion batteries (LIBs). Co/Co₃O₄/NHPC is obtained from a typical dual-template (silica opal is employed as a hard template and F127 (EO₁₀₆PO₇₀EO₁₀₆) acts as a soft template to guide the mesoporous structure) by taking advantage of resol (phenol/formaldehyde) as carbon source, dicyandiamide as nitrogen source, and cobalt nitrate as cobalt source. We have optimized the performance of Co/Co₃O₄/NHPC composite base on the contents of Co/Co₃O₄ in composite. 0.6-Co/Co₃O₄/NHPC (0.6 g cobalt nitrate in precursor solution) demonstrates a high discharge capacity (1823 mAh g⁻¹ after 200 cycles at 0.2 A g⁻¹), excellent cycling stability, and high-rate capability (1313/1056/576 mAh g⁻¹ after 500 cycles at 2/5/10 A g⁻¹). This outstanding LIB anode performance can be attributed to the hierarchically ordered porous carbon that could effectively provide rapid diffusion path way for electrolyte and metallic Co that could accelerate the transmission of electrons.

这项工作探索封装在氮掺杂的分级有序多孔碳（Co / Co ₃ O ₄ / NHPC）中的Co / Co ₃ O ₄纳米颗粒的制备，并研究其在锂离子电池（LIB）中的电化学性能。Co / Co ₃ O ₄ / NHPC是从典型的双模板（硅胶蛋白石用作硬模板，F127（EO ₁₀₆ PO ₇₀ EO ₁₀₆）用作软模板，以引导介孔结构）获得的，它具有以下优点：甲酚（苯酚/甲醛）为碳源，双氰胺为氮源，硝酸钴为钴源。我们优化了Co / Co ₃的性能O ₄ / NHPC复合材料基于复合材料中Co / Co ₃ O ₄的含量。0.6-CO / CO2 ₃ ö ₄ / NHPC（0.6克硝酸钴前体溶液）显示高的放电容量（毫安1823克^-1 0.2 A G 200次循环后^-1，优异的循环稳定性），以及高倍率性能（1313/1056/576毫安克^-1在2/5/10 A G 500次循环后^-1）。这种出色的LIB阳极性能可以归因于可以有效地为电解质和金属Co提供快速扩散途径的分层有序的多孔碳，从而可以加速电子的传输。