Fe2 O3纳米棒是由纳米尺寸颗粒组成,纳米棒的平均直径13 nm,平均长度1 mm,在0.01~3 V (vs.Li+/Li)的电压区间内,采用动电流循环考察电极材料的储锂性能和循环性能。在100 mA/g 的电流密度下稳定循环50次,Fe2 O3纳米棒电极表现出高的可逆容量576.7mAh/g 和良好的倍率性能,放电电流增大到1 A/g,其放电容量仍然保持在467 mAh/g。Fe2 O3纳米棒电极高的倍率性能和优异的循环性能是由于其宏观纳米尺寸颗粒形成的良好导电网络结构,加快了电极和电解质界面的电子和锂离子传递速率。
The Fe2O3 nanorods were composed of nano-sized particles with an average diameter of 13nm and an average length of 1 mm.The lithium storage capability and cycling performance of these electrodes were evalua-ted through galvanic current cycles in the voltage range of 0.01 and 3.0 V.After 50 stable charge and discharge cycles,the electrodes of Fe2O3 nanorod exhibited a high reversible capacity of 576.7 mAh/g at the current den-sity of 100 mA/g,and a good rate capability.Even at the current density of 1 A/g,it still maintained a high discharge capacity of 467 mAh/g.The high rate capability and cycling performance of Fe2O3 nanorods were at-tributed to the perfect conducting network structure formed by these nano-sized particles which accelerated the transfer rate of electrons and Li+ between the interfaces of the electrode and electrolyte.
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