Abstract Nanoparticles of Li2MnO3 were fabricated by sol-gel method using precursors of lithium acetate and manganese acetate, and citric acid as chelating agent in the stoichiometric ratio. TGA/DTA measurements of the sample in the regions of 30 °C to 176 °C, 176 °C to 422 °C and 422 °C to 462 °C were taken to identify the decomposition temperature and weight loss. The XRD analysis of the sample indicates that the synthesized material is monoclinic crystalline in nature and the calculated lattice parameters are 4.928 Å (a), 8.533 Å (b), and 9.604 Å (c). The surface morphology, particle size and elemental analysis of the samples were observed using SEM and EDAX techniques and the results confirmed the agglomeration of nanoparticles and, as expected, Li2MnO3 composition. Half cells of Li2MnO3 were assembled and tested at C/10 rate and the maximum capacity of 27 mAh/g was obtained. Charging and discharging processes that occurred at 3 V and 4 V were clearly observed from the cyclic voltammetric experiments. Stability of the electrodes was confirmed by the perfect reversibility of the anodic and cathodic peak positions observed in the cyclic voltammogram of the sample. The Li2MnO3 nanoparticles exhibit excellent properties and they are suitable for cathode materials in lithium ion batteries.

中文翻译：

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锂离子电池用溶胶-凝胶技术合成及表征Li2MnO3纳米颗粒

摘要 以醋酸锂和醋酸锰为前驱体，柠檬酸为螯合剂，按化学计量比，采用溶胶-凝胶法制备了Li2MnO3纳米颗粒。在 30 °C 至 176 °C、176 °C 至 422 °C 和 422 °C 至 462 °C 的区域内对样品进行 TGA/DTA 测量，以确定分解温度和重量损失。样品的 XRD 分析表明合成的材料本质上是单斜晶，计算的晶格参数为 4.928 Å (a)、8.533 Å (b) 和 9.604 Å (c)。使用 SEM 和 EDAX 技术观察样品的表面形貌、粒径和元素分析，结果证实了纳米颗粒的团聚，正如预期的那样，Li2MnO3 组成。Li2MnO3 的半电池在 C/10 倍率下组装和测试，获得了 27 mAh/g 的最大容量。从循环伏安实验中可以清楚地观察到在 3 V 和 4 V 下发生的充电和放电过程。在样品的循环伏安图中观察到的阳极和阴极峰位置的完美可逆性证实了电极的稳定性。Li2MnO3纳米颗粒表现出优异的性能，适用于锂离子电池正极材料。