糠醇树脂炭化产物作为锂离子电池炭电极材料的研究(II)——炭化产物制备的电极材料组装的锂离子电池电化学性能测试

STUDY OF THE CARBONIZED PRODUCT OF FURFURALCOHOL RESIN AS THE ELECTRODE MATERIALS OF LITHIUM ION BATTERIES (II)—THE TESTING OF THE ELECTROCHEMICAL PERFORMANCE OF THE LITHIUM ION CELLS ASSEMBLED WITH THE RESIN CARBON MATERIALS

测试分析了糠醇树脂炭化产物组装的锂离子电池电化学性能。实验结果表明 ,5 5 0℃处理的糠醇树脂炭化样品充放电容量较低 ,还不能作为二次锂离子电池炭负极材料。 6 2 0℃～ 130 0℃范围内处理的糠醇树脂炭化样品组装的锂离子电池则都表现出了相对较高的充放电容量。其中 70 0℃炭化处理的样品组装的锂离子电池充放电容量最高。炭化处理温度对糠醇树脂制备的炭电极充放电容量不可逆性也有着较强的影响。随着炭化处理温度升高 ,炭电极充放电容量不可逆性在逐渐降低。 70 0℃和 130 0℃炭化处理的样品与 6 2 0℃炭化处理的样品相比不可逆性分别降低了约 5个和 19个百分点。实验结果还表明 ,树脂炭化产物的比表面积是影响电池充放电性能的重要因素 ,炭化产物的比表面积越大 ,电池的充放电容量就越高。

The furfuralcohol resin was carbonized to make the resin carbon. The electrochemical performance of the lithium ion cells using the resin carbon materials as the electrodes was tested and analyzed. The result indicated that the charge discharge capacities of sample of furfuralcohol resin carbonized at 550 ℃ were lower and the sample was unfit to use as the electrode material of lithium ion battery. Samples treated at the temperature of 620 ℃～1 300 ℃ revealed relatively higher charge discharge capacities, thereinto, the capacity of sample treated at 700 ℃ was at top. There was a stronger effect of carbonization treating temperature on charge discharge capacity irreversibility of resin carbon derived from furfuralcohol resin. The charge discharge capacity irreversibility was decreased with the increase of carbonization temperature. As compared with sample treated at 620 ℃, the irreversibility of samples treated at 700 ℃ and 1 300 ℃ decreased by about 5 % and 19 %, respectively. The results also indicated that the specific surface area of the resin carbon is an important effective factor on the charge discharge capacities of battery. The bigger the specific surface area of the resin carbon, the higher is the capacity of the battery.