喷雾热蒸发炭膜用于二次锂离子电池负极的研究

SPRAYED AND THERMALLY EVAPORATED CARBON FILMS AS ANODES FOR SECONDARY LITHIUM ION BATTERIES

以有机热解炭(石墨)为原料,用喷雾热蒸发法制备了用于二次锂离子电池负极的炭膜,用循环伏安法和恒电流充放电法测试了所获炭膜的电化学性能,测试结果表明,在第1循环周期中存在1个还原峰对应在电极表面形成固体电解质中间相膜;当充放电电流大小合适时,容量和每mol炭中嵌入其他物质的摩尔数(x)值都较大,基于这些实验结果,认为所获得的炭膜能用作电池负极以相对测试其他正极材料的电化学性能。

Carbon films were made using spray-thermal evaporation from a kind of pyrolytic carbon powder. The obtained films with graphite structure were both potentialstatieally and galvanostaieally tested. Cycling patterns indicated a reduction peak on the first cycle corresponding to the formation of solid electrolyted interface, and the capacity values and x values were reasonable compared to theoretical ones when charging-discharging current density was suitable. Based on the experimental results, the obtained carbon films could be used as anode materials for relatively determining the electrochemical performances of cathode materials.