以木质素磺酸钠为原料,采用水热法成功制备木质素基碳微球。水热反应温度和水热反应时间是影响碳微球球形度、石墨微晶结构完善性以及电化学性能的主要因素。水热反应温度为230℃、水热反应时间为12h时制备的碳微球粒径为5～7μm,表现出最佳的电化学性能,0.1C充放电可逆比容量达389.4mAh/g,1C充放电容量达180mAh/g,1C倍率下循环100次后容量保持率高达97.8%。
The lignin-based carbon microspheres can be successfully prepared by hydrothermal method.The hydrothermal reaction temperature and time were the main factors affecting the sphericity,the integrity of graphite microcrystals and properties of carbon microspheres.The carbon material prepared by hydrothermal reaction at 230℃ for 12h had a particle size range of 5～7μm and exhibited the best electrochemical performance.It shown a reversible capacity of 389.4mAh/g at 0.1C rate,and 180mAh/g at 1C rate.Its capacity still remained 97.8% after charge-discharged at 1C rate for 100 cycles.
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