摘要
采用葡萄糖还原法在固相法制备的LiFePO4基础上合成了Ag包覆的LiFePO4/Ag材料;同时采用一步法合成了碳银共包覆的LiFePO4/(Ag+C)材料。结果表明,Ag包覆将LiFePO4材料的首次放电容量由80mAhg-1提高到121mAhg-1;而碳银共修饰的LiFePO4/(Ag+C)材料具有更高的放电容量(132mAhg-1),并且具有更好的循环性能。此外,Ag包覆也大幅度降低了材料的电阻,电极的电荷转移电阻由253.5Ω降低到了54.8Ω。
LiFePO4/Ag material coatcd by Ag was symhesed on basis of LiFePO4 prepared by solid-phase by using glucose reduction method, and LiFePO4/（Ag＋C） material coated by carbon and silver was also synthesed by one-step method. The result showed that, comparing with the first discharge capacity of LiFePO4/Ag material coated by Ag which changed from 80 mAhg-1 to 121 mAhg-1, LiFePO4/（Ag＋C） material coated by carbon and silver had a higher discharge capacity （132 mAhg-1）, and better cycling performance. In addition, the material resistance was also significantly reduced from 253.5 Ω to 54.8 Ω.
出处
《广东化工》
CAS
2010年第7期26-28,共3页
Guangdong Chemical Industry
