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首页> 外文期刊>CERAMICS INTERNATIONAL >Binder-free carbon-coated TiO2@graphene electrode by using copper foam as current collector as a high-performance anode for lithium ion batteries
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Binder-free carbon-coated TiO2@graphene electrode by using copper foam as current collector as a high-performance anode for lithium ion batteries

机译：通过使用铜泡沫作为集电器作为锂离子电池的高性能阳极，通过使用铜泡沫作为铜离子电池的高性能阳极的粘合剂碳涂覆的TiO 2

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摘要

Anatase TiO2 is widely used in lithium ion batteries (LIBs) due to its excellent safety and excellent structural stability. However, due to the poor ion and electron transport and low specific capacity (335 mAh g(-1)) of TiO2, its application in LIBs is severely limited. For the first time, we report a binder-free, carbon-coated TiO2@ graphene hybrid by using copper foam as current collector (TG-CM) to enhance the ionic and electronic conductivity and increase the discharge specific capacity of the electrode material without adding conductive carbon (such as super P, etc.) and a binder (such as polyvinylidene fluoride (PVDF), etc.). When serving as an anode material for LIBs, TG-CM displays excellent electrochemical performance in the voltage range of 0.01-3.0 V. Moreover, the TG-CM hybrid delivers a high reversible discharge capacity of 687.8 mAh g(-1) at 0.15 A g(-1). The excellent electrochemical performance of the TG-CM hybrid is attributed to the increased lithium ion diffusion rate due to the introduction of graphene and amorphous carbon layer, and the increased contact area between the active material and electrolyte, and small resistance with copper foam as the current collector without an additional binder (PVDF) and conductivity carbon (super P).
机译：由于其优异的安全性和优异的结构稳定性，锐钛矿TiO2广泛用于锂离子电池（LIBS）中。然而，由于离子和电子传输的差和较低的TiO 2（335mAh（-1）），其在Libs中的应用严重限制。首次，我们通过使用铜泡沫作为集电器（Tg-cm）来报告无粘合剂的碳涂覆的TiO2 @ Graphene杂交，以增强离子和电子电导率，而不会增加电极材料的放电比容量导电碳（例如超级P等）和粘合剂（例如聚偏二氟乙烯（PVDF）等）。当用作LIBS的阳极材料时，TG-CM在0.01-3.0V的电压范围内显示出优异的电化学性能。此外，TG-CM杂交物在0.15 a下提供687.8 mah g（-1）的高可逆放电容量g（-1）。 Tg-cm杂种的优异电化学性能归因于由于引入石墨烯和非晶碳层而增加的锂离子扩散速率，以及活性材料和电解质之间的增加的接触面积，以及与铜泡沫的耐受小电流收集器没有额外的粘合剂（PVDF）和电导率碳（超级P）。

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