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High performance Li4Ti5O12/CN anode material promoted by melamine-formaldehyde resin as carbon-nitrogen precursor

机译:三聚氰胺-甲醛树脂作为碳氮前驱体促进的高性能Li4Ti5O12 / CN阳极材料

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摘要

A carbon-nitrogen coating approach using melamine-formaldehyde resin as carbon-nitrogen source is introduced in this work with the aim of getting high rate Li4Ti5O12/CN composite. Li4Ti5O12/CN composite, particle size of 50-100 nm in diameter, is well dispersed and the carbon-nitrogen layers are 2 nm in thickness. The composite delivers much higher electrochemical performance than those of Li4Ti5O12. At 0.2 C and 10 C, it exhibits a discharge capacity of 172 mA h g (-1) and 160 mA h g (-1), respectively, and after 250 cycles at 10 C, 97.4% of its initial capacity is retained. The superior electrochemical performance can be attributed to the improved ionic and electronic conductivity in the electrode due to the uniform and ultrathin carbon-nitrogen coating layer.
机译:为了获得高效率的Li4Ti5O12 / CN复合材料,在这项工作中引入了一种以三聚氰胺-甲醛树脂为碳氮源的碳氮涂覆方法。直径为50-100 nm的Li4Ti5O12 / CN复合材料分散良好,碳氮层的厚度为2 nm。该复合材料比Li4Ti5O12具有更高的电化学性能。在0.2 C和10 C下,它的放电容量分别为172 mA h g(-1)和160 mA h g(-1),在10 C下250次循环后,其初始容量保持97.4%。优异的电化学性能可归因于均匀且超薄的碳氮涂层,改善了电极中的离子和电子导电性。

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