In order to improve the lithium storage capacity of lithium-ion battery anode materials, three nitrogen-doped and nitrogen-doped hollow carbon materials (Cw-GO), nitrogen-doped carbon aerogels, and three-dimensional nitrogen-doped porous carbon materials (PCMs) were prepared, and their electrochemical properties were studied. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen adsorption desorption instrument were used to detect the morphology and structure of the samples. The electrochemical properties of the samples were tested by cyclic voltammetry (CV), impedance spectroscopy (EIS), and cyclic charge discharge (GCD). The results show that the introduction of graphene oxide (GO) can improve the specific capacitance and electrochemical activity of the composites; nitrogen-doped carbon aerogel electrode material has better capacitance characteristics. PCM has a large specific surface area and a large capacitance response, which reaches 168.5 F g⁻¹ at the current density of 1 A g⁻¹. When the current density is 10 A g⁻¹, 1000 cycles of constant current charge and discharge test is carried out. When the current density is 20 A g⁻¹, the specific capacitance of PCM keeps 88.3% of the original capacitance and has good electrochemical performance.

中文翻译：

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氮掺杂碳电极材料的制备及电化学性能

为了提高锂离子电池负极材料的储锂容量，三种掺氮和掺氮空心碳材料（Cw-GO）、掺氮碳气凝胶和三维掺氮多孔碳材料（制备了 PCM)，并研究了它们的电化学性能。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）和氮气吸附脱附仪对样品的形貌和结构进行检测。通过循环伏安法（CV）、阻抗谱（EIS）和循环充电放电法（GCD）对样品的电化学性能进行了测试。结果表明，氧化石墨烯（GO）的引入可以提高复合材料的比电容和电化学活性；氮掺杂碳气凝胶电极材料具有更好的电容特性。PCM具有较大的比表面积和较大的电容响应，达到168.5 F g^-1在 1 A g ^-1的电流密度下。当电流密度为10A g ^-1时，进行1000次恒流充放电循环测试。当电流密度为20 A g ^-1时，PCM的比电容保持在原电容的88.3%，具有良好的电化学性能。