摘要
用微波法制备了LiFePO4和LiFePO4/C材料。分析了不同的微波烧结时间与材料结构和性能的关系。材料经微波烧结3 min,XRD图谱中出现了Fe2O3杂质,时间更长时则不出现Fe2O3杂质。充放电测试结果表明:烧结8 min的LiFe-PO4/C材料0.1C的首次放电比容量达140.0 mAh/g,但高倍率放电比容量衰减严重;烧结5 min的材料在1.0C放电倍率下,比容量超过了95.0 mAh/g。
Microwave processing was used to synthesize LiFePO4 and LiFePO4/C. The rehtionship between microwave sintering time and the structure, performance of the material was investigated. Fe203 impurity appeared in XRD pattern when sintering time was 3 min, hut it did not appear in materials sintered with longer time. The charge-discharge test results showed the initial discharge specific capacity of LiFePO4/C sintered for 8 min was up to 140.0 mAh/g at 0.1 C discharge rate, but it declined rapidly in high rates. The specific capacity of material sintered for 5 min was above 95.0 mAh/g at 1 C rate discharge.
出处
《电池》
CAS
CSCD
北大核心
2006年第2期142-143,共2页
Battery Bimonthly
基金
国家自然科学基金(50404013)
