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首页> 外文期刊>Electrochimica Acta >Preparation of Li4Ti5O12 nanosheetsicarbon nanotubes composites and application of anode materials for lithium-ion batteries
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Preparation of Li4Ti5O12 nanosheetsicarbon nanotubes composites and application of anode materials for lithium-ion batteries

机译:Li4Ti5O12纳米片碳纳米管复合材料的制备及负极材料在锂离子电池中的应用

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摘要

Li4Ti5O12 nanosheets (LTO NSs)/carbon nanotubes (CNTs) composites are synthesized using a facile, reproducible, and scalable strategy. In the hydrothermal process, the introduction of CNTs significantly improves the rate performance of LTO NSs. The incorporation of CNTs into the LTO NSs forms a delicate conductive network for rapid electron and lithium ions transport, resulting in excellent rate performance and superior cycling performance. LTO NSs/7.5%-CNTs composites show the highest reversible capacity and high-rate capability (a reversible capability of 157, 145, 132, 118, and 105 mA h g (1) at 1, 2, 3, 4, 5 A g (1) respectively) with good cycling performance (approximate 6.9% capacity loss after 1000 cycles at 2 A g with a capacity retention of 135 mA h g (1)), which is apparently larger than pristine LTO NSs. The significantly improved rate capability and cycling performance of the LTO NSs/CNTs composites are mainly attributed to their the lower polarization of potential difference, the larger diffusion coefficient of lithium ion and smaller charge-transfer resistance than pure LTO NSs. (C) 2016 Elsevier Ltd. All rights reserved.
机译:Li4Ti5O12纳米片(LTO NSs)/碳纳米管(CNT)复合材料是使用一种简便,可复制和可扩展的策略合成的。在水热过程中,CNT的引入显着提高了LTO NSs的速率性能。将CNT掺入LTO NS中可形成精细的导电网络,以实现快速的电子和锂离子传输,从而实现出色的倍率性能和出色的循环性能。 LTO NSs / 7.5%-CNTs复合材料显示出最高的可逆容量和高倍率能力(在1,2,3,4,4,5 A g下可逆能力为157、145、132、118和105 mA hg(1) (分别为(1))和良好的循环性能(在2 A g下1000次循环后约6.9%的容量损失,容量保持率为135 mA hg(1)),显然比原始的LTO NS大。与纯LTO NSs相比,LTO NSs / CNTs复合材料的显着提高的速率能力和循环性能主要归因于它们的电势差极化更低,锂离子扩散系数更大,电荷转移电阻更小。 (C)2016 Elsevier Ltd.保留所有权利。

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