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首页> 外文期刊>International Journal of Electrochemical Science >High-rate-capability Graphene Oxide/Li4Ti5O12-composite Anode for Lithium-Ion Batteries
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High-rate-capability Graphene Oxide/Li4Ti5O12-composite Anode for Lithium-Ion Batteries

机译：锂离子电池高容量氧化石墨烯/ Li 4 Ti 5 O 12 复合阳极

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摘要

A graphene oxide/Li4Ti5O12 (GO/LTO) composite was prepared with 1 wt% GO and 99 wt% commercial LTO by stirring at a high speed and then drying at a low temperature. Compared with pure LTO, the GO/LTO composite demonstrated higher charge capacity and better rate capability over 0-3 V. The charge capacities at 0.5, 1, 3, 5, and 10 C were 246.3, 234.0, 223.2, 220.6, and 214.1 mAh g-1, respectively, for GO/LTO and 233.7, 218.7, 202.1, 190.5, and 148.5 mAh g-1, respectively, for LTO. Furthermore, the GO/LTO composite retained 95.1% of the initial capacity after 200 cycles at a high rate of 5 C, which was considerably higher than that that retained by the pure LTO (57.9%). The greatly improved electrochemical performance is attributed to an enhancement of lithium ion and electron conductivity caused by GO addition. GO acts as a binder, thereby improving the adhesive power of the electrode materials to the current collector. The electrode polarization is reduced and the electrolyte reduction decomposition is partially suppressed by adding GO. The process of preparing the GO/LTO composite is simple, low-cost and suitable for industrial use.
机译：通过高速搅拌然后在低温下干燥，以1重量％的GO和99重量％的商业LTO制备氧化石墨烯/ Li 4 Ti 5 O 12（GO / LTO）复合材料。与纯LTO相比，GO / LTO复合材料在0-3 V的电压下具有更高的充电容量和更好的倍率能力.0.5、1、3、5和10 C时的充电容量分别为246.3、234.0、223.2、220.6和214.1 GO / LTO分别为mAh g-1，LTO分别为233.7、218.7、202.1、190.5和148.5 mAh g-1。此外，GO / LTO复合材料在200次循环后以5 C的高速率保留了95.1％的初始容量，这大大高于纯LTO所保留的初始容量（57.9％）。电化学性能的大大改善归因于GO的加入导致锂离子和电子电导率的提高。 GO充当粘合剂，从而提高电极材料对集流体的粘合力。通过添加GO，电极极化降低并且电解质还原分解被部分抑制。 GO / LTO复合材料的制备过程简单，成本低廉，适合工业使用。

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