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OALib Journal期刊
ISSN: 2333-9721
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尖晶石锰酸锂的组成对其结构和性能的影响
Keywords: 无机非金属材料,锰酸锂,锂锰配比
Abstract:
？以电解二氧化锰和碳酸锂为原料用高温固相法合成了尖晶石锰酸锂,在锂与锰的原子比从0.95:2到1.1:2范围内,其结构为单一尖晶石相,晶格常数和比容量随着锂锰比的增加呈现出先增大后降低的变化规律.在锂锰比为1.0:2和1.02:2附近,晶格常数和比容量分别达到最大.这种变化规律与锂离子在晶格中的位置有关.在锂锰比从1.0:2到1.1:2的范围内,随着锂锰比的增加,尖晶石锰酸锂嵌脱锂反应过程的动力学极化逐渐降低,大电流性能逐渐提高.以尖晶石锰酸锂为正极,mcmb为负极组装了423048型电池,锂锰比从1.0:2到1.1:2,电池循环稳定性随锰酸锂的锂锰比的增大而提高.
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