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Preparation of LiCoMnO_4 Assisted by Hydrothermal Approach and its Electrochemical Performance

机译:水热法辅助制备LiCoMnO_4及其电化学性能

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LiCoMnO_4 materials have been synthesized via a hydrothermal approach followed by a post-annealing process. Pure phase of LiCoMnO_4 is unable to form under hydrothermal conditions; however, high quality of pure LiCoMnO_4 was achieved after annealing the hydrothermal products. The concentration of LiOH and the post-annealing temperature are the crucial factors to form LiCoMnO_4. Without post-annealing process, the highest contents of LiCoMnO_4 in the hydrothermal products are less than 50% (e.g., in the presence of 1.2-1.35 M LiOH); in contrast, in the cases of 1.35-1.4 M LiOH, almost pure phase of LiCoMnO_4 has been achieved successfully after annealing the hydrothermal precursors at 750℃. The as-prepared sample in the presence of 1.35 M LiOH, after annealed at 750℃, exhibits a capacity of 91.6 mAh g~(-1).
机译:LiCoMnO_4材料已经通过水热方法合成,然后进行了后退火工艺。 LiCoMnO_4的纯相在水热条件下无法形成。然而,在对水热产物进行退火之后,获得了高质量的纯LiCoMnO_4。 LiOH的浓度和退火后的温度是形成LiCoMnO_4的关键因素。如果不进行后退火处理,则水热产物中LiCoMnO_4的最高含量小于50%(例如,在1.2-1.35 M LiOH的存在下);相反,在1.35-1.4 M LiOH的情况下,将水热前体在750℃退火后,成功地获得了几乎纯的LiCoMnO_4相。制备的样品在1.35 M LiOH存在下,在750℃退火后,具有91.6 mAh g〜(-1)的容量。

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