采用喷雾干燥制备铁系正极材料,研究了不同煅烧温度对产物物相、粒度以及电化学性能的影响,并利用XRD、SEM和激光粒度分析仪对产物进行了表征.采用二次电池测试仪对正极活性材料进行了测试.结果表明,300℃时煅烧产物由LiFe5O8和LiFeO2组成,随着温度的升高,LiFe5O8减少,到700℃时生成单一的LiFeO2,其在300℃时首次放电比容量为232mAh/g,随着反应温度的升高,首次放电容量逐渐减小.
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