摘要
λ—MnO2 在非水溶液中作为锂二次电池正极材料近年来进行了广泛的研究 ,但在水溶液中研究较少。使用SEM、XRD、UV -VIS技术研究了在λ -MnO2 制备过程中表面形态的变化及其在碱性 (9mol/LKOH)和中性 (5mol/LLiNO3)电解液中的稳定性。实验表明 ,λ-MnO2 在室温下 (≤ 35℃ )碱性 (9mol/LKOH)中是稳定的 ,在高于 50℃时晶型则转化为δ-MnO2 。
SEM and XRD techniques were used to study the electrochemical characteristics of λ-MnO 2.SEM pictures showed that surfaces of the samples became smooth after acid treatment. Samples treated in various electrolytes at different temperatures showed different stability:λ MnO 2 was stable in 9mol/L KOH and 5mol/L LiNO 3 at room temperature,when the temperature was higher than 50℃,the crystal structure of MnO 2 changed from λ to δ form in 9mol/L KOH,but remained stable in 5 mol/L LiNO 3 solution.
出处
《电池》
CAS
CSCD
北大核心
2000年第2期53-55,共3页
Battery Bimonthly
基金
国家自然科学基金资助项目
