This work aims at shedding light on how the microporous texture of porous carbons influences their electrochemical behavior when used as anodes for Li-ion batteries. To this aim, a synthetic hard carbon (carbon xerogel, CX), prepared from a resorcinol-formaldehyde precursor gel, underwent several post-synthesis treatments in order to modulate its micropore to total pore volume ratio. The micropore volume was either expanded by physical activation or decreased using chemical vapor deposition (CVD) of a carbon layer.

Several variables other than the micropore texture of the obtained carbons, which could influence their behavior as anode active materials for Li-ion batteries, such as the particle size or the electrode characteristics, were carefully controlled. The thickness of electrode coatings and the pore texture of the active material-binder composite were analyzed. It was shown that CX-binder composites resulting from water-based slurries preserve the microporosity of the starting materials. Detailed electrochemical characterization of the electrodes prepared with carbon xerogels displaying various defined micropore textures was performed. A clear linear dependency could be evidenced between the Li⁺ insertion and de-insertion in half-cell configuration with the increase of the volume of supermicropores (0.7–2 nm), demonstrating the effect of micropore enlargement by activation on the storage capacity, provided the maximum charge potential value is set at 3.0 V vs. Li⁺/Li.

这项工作旨在揭示多孔碳的微孔质地在用作锂离子电池阳极时如何影响其电化学行为。为了这个目的，由间苯二酚-甲醛前体凝胶制备的合成硬碳（碳干凝胶，CX）经过数次合成后处理，以调节其微孔与总孔体积比。通过物理激活扩大微孔体积，或使用碳层的化学气相沉积（CVD）减少微孔体积。

仔细控制了除所得碳的微孔结构以外的其他一些变量，这些变量可能会影响其作为锂离子电池负极活性材料的性能，例如粒径或电极特性。分析了电极涂层的厚度和活性材料-粘合剂复合材料的孔结构。结果表明，由水基浆料制得的CX-粘合剂复合材料保留了起始材料的微孔性。对显示出各种定义的微孔纹理的碳干凝胶制备的电极进行了详细的电化学表征。Li ⁺之间存在明显的线性相关性在半电池配置中，随着超微孔体积的增加（0.7–2 nm）插入和反插入，证明了最大活化电势设置为3.0 V vs. 。李⁺ /李。