| 稻壳基活性炭负载MgO复合材料在对称超级电容器中的应用 |
| Application of rice husk-based activated carbon-loaded MgO composite for symmetric supercapacitors |
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| 摘要: 将稻壳经低温炭化、KOH 高温活化处理，得到无定形活性炭(AC)材料，再采用 MgO 原位负载的方法制备一系列炭负载MgO复合材料(MgO/AC)。采用X射线衍射(XRD)、激光共聚焦拉曼光谱、X射线光电子能谱(XPS)、扫描电子显微镜-X射线能谱(SEM-EDS)和氮气吸附-脱附测试研究了MgO/AC的表面形貌、元素组成，并详细分析了孔结构与电化学性能之间可能存在的关系。结果表明，对称超级电容器 2.0MgO/AC||2.0MgO/AC 在 0.5 A·g-1电流密度下的比电容为 211.9 F·g-1，当功率密度为 0.41kW·kg-1时其具有18.30 Wh·kg-1的能量密度，且经过5 000次循环后的电容保持率为86.8%。 |
| 关键词: MgO负载活性炭 复合电极 对称超级电容器 能量密度 |
| 基金项目: 江西省教育厅科技项目(No.GJJ202616)和南昌师范学院校级科技项目(No.23XJZR02)资助。 |
| Abstract: Amorphous activated carbon (AC) material was obtained by carbonizing rice husk at low temperatures and activated by KOH at high temperatures. A series of MgO-loaded AC materials (MgO/AC) were prepared by in-situ loading of magnesium chloride. The surface morphology and elemental composition of MgO/AC materials were studied using X-ray diffraction (XRD), laser co-polymerization Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), and nitrogen adsorptiondesorption test. The possible relationship between pore structure and electrochemical performance was analyzed in detail. The test results indicated that 2.0MgO/AC electrodes were assembled into a symmetric supercapacitor, and the gravimetric capacitance was 211.9 F·g-1 at 0.5 A·g-1. It had an energy density of 18.30 Wh·kg-1 at a power density of 0.41 kW·kg-1 and the retention rate was 86.8% after 5 000 cycles. |
| Keywords: MgO-loaded activated carbon composite electrode symmetric supercapacitor energy density |
| 投稿时间：2024-06-12 修订日期：2024-12-07 |
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| 隋光辉,程岩岩.稻壳基活性炭负载MgO复合材料在对称超级电容器中的应用[J].无机化学学报,2025,41(3):521-530. |
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