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High-performance lithium storage of Ti3+-doped anatase TiO2@C composite spheres

机译:Ti3 +掺杂anatase TiO2 @ C复合球的高效锂储存

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Ti ~(3+) -Doped anatase TiO _(2) @C composite spheres (TD-TiO _(2) @C) are synthesized for the first time by the solvothermal method, followed by calcination using as-prepared anatase/TiO _(2) -B hybrid TiO _(2) spheres and glycerol solution in alcohol as reactants. TD-TiO _(2) @C spheres exhibit excellent electrochemical performance as anode materials for lithium ion batteries (LIBs). The electrodes not only exhibit a superior capacity of 244.80 mA h g ~(?1) at 1C (0.168 A g ~(?1) ) after 100 cycles, but also show an eminent rate capability. TD-TiO _(2) @C spheres retain discharge capacities of 171.78, 143.45, 119.17, 105.82 mA h g ~(?1) after 500 cycles at 5C, 10C, 20C, 30C, holding a capacity retention as high as 91.0%, 84.2%, 82.1%, 82.0% when compared with discharge capacities at the 10th cycle, respectively. The improved electrochemical properties are mainly due to the synergistic effects of carbon coating and Ti ~(3+) doping, which can enhance significantly the inherent electronic conductivity of TiO _(2) . Therefore, TD-TiO _(2) @C can be an attractive candidate for anode materials in LIBs, also with great promise.
机译:Ti〜(3+) - 掺杂的锐钛酶TiO _(2)o型复合球(Td-TiO _(2)@c)首次通过溶剂热方法合成,然后使用用作制备的anatase / tiO进行煅烧_(2)-B杂交TiO_(2)球体和甘油溶液作为反应物。 TD-TIO _(2)@c球体表现出优异的电化学性能作为锂离子电池(LIBS)的阳极材料。电极不仅在100℃下的244.80mA H g〜(α1)的优异容量,而且在100个循环后,还显示出突出速率能力。 TD-TIO _(2)@c球体在5℃,10c,20c,30℃下保持500次循环后的放电容量为171.78,11,143.45,119.17,105.82 mA Hg〜(α1),保持高达91.0%的容量保持,与第10次循环的放电容量相比,84.2%,82.1%,82.0%。改善的电化学性质主要是由于碳涂层和Ti〜(3+)掺杂的协同效应,这可以提高TiO _(2)的固有电子电导率。因此,TD-TIO _(2)@c可以是LIBS中的阳极材料的有吸引力的候选者,也具有很大的承诺。

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