Dual-Modified Li4Ti5O12 Anode by Copper Decoration and Carbon Coating to Boost Lithium Storage,ACS Sustainable Chemistry & Engineering

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Dual-Modified Li4Ti5O12 Anode by Copper Decoration and Carbon Coating to Boost Lithium Storage
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-11-09 , DOI: 10.1021/acssuschemeng.0c05835
Xue Bai ₁ , Tao Li ₂ , Yu-Jun Bai ₃

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The low electronic conduction of Li₄Ti₅O₁₂ negative materials for Li-ion batteries leads to unsatisfactory electrochemical performance. Here, we report a Li₄Ti₅O₁₂ anode modified by copper decoration and carbon coating to simultaneously boost the Li-ion storage capacity and rate capabilities. The optimal Li₄Ti₅O₁₂ anode reveals a remarkable reversible Li-ion storage capacity (285.3 mAh g^–1 when cycled at 100 mA g^–1 for 100 cycles) and significantly improved rate capabilities compared to pristine Li₄Ti₅O₁₂. When cycled at 1000 mA g^–1, a reversible capacity of 189.4 mAh g^–1 is retained after 500 cycles. The greatly enhanced electrochemical property is attributed to the dual effect of the carbon coating and copper decoration, which promotes the whole electronic conductivity.

中文翻译：

铜装饰和碳涂层双重改性的Li ₄ Ti ₅ O ₁₂阳极，以提高锂的存储量

用于锂离子电池的Li ₄ Ti ₅ O ₁₂负极材料的低电子传导导致电化学性能不理想。在此，我们报道了一种通过铜装饰和碳涂层改性的Li ₄ Ti ₅ O ₁₂阳极，可同时提高锂离子的存储容量和倍率性能。与原始的Li ₄ Ti ₅ O相比，最佳的Li ₄ Ti ₅ O ₁₂阳极具有显着的可逆锂离子存储容量（以100 mA g ^–1循环100次时为285.3 mAh g ^–1），并显着提高了倍率能力。₁₂。以1000 mA g ^–1循环时，经过500次循环后，可逆容量为189.4 mAh g ^–1。电化学性能的大大提高归因于碳涂层和铜装饰的双重作用，从而促进了整个电子导电性。

更新日期：2020-11-23

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