| 纳米铋颗粒修饰三维多孔碳的制备及其储钠性能 |
| Three-dimensional porous carbon decorated with nano bismuth particles: Preparation and sodium storage properties |
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| 摘要: 通过将纳米Bi颗粒与三维多孔碳(3DPC)材料复合制备得到Bi/3DPC复合材料，有效提高了Bi的电化学性能。3DPC作为碳框架能缓冲充放电过程中Bi的体积膨胀以及提升材料导电性，且其微孔和介孔能够增加材料的比表面积，为吸附钠离子提供活性位点。Bi和3DPC发挥协同效应，在钠离子电池中展现出良好的倍率性能和长期循环稳定性。在5 A·g-1的电流密度下，Bi/3DPC在循环1 000圈后仍保持268.52 mAh·g-1的比容量。 |
| 关键词: 三维多孔碳 铋 钠离子电池 负极材料 |
| 基金项目: |
| Abstract: Bi nanoparticles were decorated on three-dimensional porous carbon (3DPC) to prepare Bi/3DPC composite, in which the 3DPC acts as a carbon framework to buffer the volume expansion of the material during discharging and charging and to enhance the electrical conductivity of the material. Besides, the micropores and mesopores of 3DPC can increase the specific surface area of the material and provide active sites for the adsorption of sodium ions. Constructing nanoscale bismuth particles cushions the structural destruction during charge and discharge processes. The impedance decreased after 50 cycles at 0.5 A·g-1, which indicates good long-term cycle stability of Bi/ 3DPC composite. And the charge storage mechanism of the materials was explored by performing cycle voltammetry tests at different scan rates, where capacitance behavior predominated. Meanwhile, Bi nanoparticles and the 3DPC take advantage of the synergistic effect, showing longterm cycle stability in sodium ion batteries. When placed under the current density of 5 A·g-1, Bi/3DPC maintained a capacity of 268.52 mAh·g-1 after 1 000 cycles. |
| Keywords: three-dimensional porous carbon bismuth sodium-ion battery anode material |
| 投稿时间：2024-06-13 修订日期：2024-10-17 |
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| 王卓,李晓彤,胡志鹏,潘俊乔.纳米铋颗粒修饰三维多孔碳的制备及其储钠性能[J].无机化学学报,2025,41(2):267-274. |
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