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采用葡萄糖引导水解-热处理工艺,通过调节热处理温度制备了不同形貌和结构的海胆状α-Fe_2O_3,并研究了其电化学特性.结果表明,改变热处理温度可有效地调节产物的结构和电化学性能.在300℃热处理获得由梭形纤维束组成的海胆状α-Fe_2O_3电极材料具有高的初始放电容量(1475.0mAhg~(-1),这明显高于700℃热处理获得由高结晶度的纳米棒组成的低比表面积的海胆状α-Fe_2O_3电极材料的931.2mAhg~(-1).这是由于低结晶度、高比表面积和有序的双模式孔有益于电解液的吸附和锂离子的传输,使电化学反应活性提高.
The sea urchin-like α-Fe_2O_3 with different morphologies and structures was prepared by the glucose-induced hydrolysis-heat treatment process and its electrochemical properties were studied. The results showed that the structure and electrochemical properties The electrodeposited sea urchin α-Fe 2 O 3 electrode material obtained by heat treatment at 300 ℃ has a high initial discharge capacity (1475.0 mAhg -1), which is obviously higher than that of 700 ℃ heat treatment. The composition of the low specific surface area of the sea urchin-like α-Fe 2 O 3 electrode material 931.2mAhg -1 This is due to the low crystallinity, high specific surface area and ordered dual-mode pore conducive to electrolyte adsorption and lithium ion Transmission, the electrochemical reaction activity.