Smart Construction of Integrated CNTs/Li4Ti5O12 Core/Shell Arrays with Superior High‐Rate Performance for Application in Lithium‐Ion Batteries,Advanced Science

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Smart Construction of Integrated CNTs/Li4Ti5O12 Core/Shell Arrays with Superior High‐Rate Performance for Application in Lithium‐Ion Batteries
Advanced Science ( IF 14.3 ) Pub Date : 2018-01-03 , DOI: 10.1002/advs.201700786
Zhujun Yao ₁ , Xinhui Xia ₁ , Cheng-Ao Zhou ₁ , Yu Zhong ₁ , Yadong Wang ₂ , Shengjue Deng ₁ , Weiqi Wang ₁ , Xiuli Wang ₁ , Jiangping Tu ₁

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Exploring advanced high‐rate anodes is of great importance for the development of next‐generation high‐power lithium‐ion batteries (LIBs). Here, novel carbon nanotubes (CNTs)/Li₄Ti₅O₁₂ (LTO) core/shell arrays on carbon cloth (CC) as integrated high‐quality anode are constructed via a facile combined chemical vapor deposition–atomic layer deposition (ALD) method. ALD‐synthesized LTO is strongly anchored on the CNTs' skeleton forming core/shell structures with diameters of 70–80 nm the combined advantages including highly conductive network, large surface area, and strong adhesion are obtained in the CC‐LTO@CNTs core/shell arrays. The electrochemical performance of the CC‐CNTs/LTO electrode is completely studied as the anode of LIBs and it shows noticeable high‐rate capability (a capacity of 169 mA h g⁻¹ at 1 C and 112 mA h g⁻¹ at 20 C), as well as a stable cycle life with a capacity retention of 86% after 5000 cycles at 10 C, which is much better than the CC‐LTO counterpart. Meanwhile, excellent cycling stability is also demonstrated for the full cell with LiFePO₄ cathode and CC‐CNTs/LTO anode (87% capacity retention after 1500 cycles at 10 C). These positive features suggest their promising application in high‐power energy storage areas.

中文翻译：

智能构建集成CNT/Li4Ti5O12核/壳阵列，具有卓越的高倍率性能，适用于锂离子电池

探索先进的高倍率负极对于下一代高功率锂离子电池（LIB）的发展具有重要意义。在这里，通过简单的组合化学气相沉积-原子层沉积（ALD）构建了碳布（CC）上的新型碳纳米管（CNT）/Li ₄ Ti ₅ O ₁₂ （LTO）核/壳阵列作为集成的高质量阳极方法。 ALD 合成的 LTO 牢固地锚定在 CNT 骨架上，形成直径为 70-80 nm 的核/壳结构，CC-LTO@CNTs 核/壳具有高导电网络、大表面积和强粘附力等综合优势。壳阵列。 CC-CNTs/LTO电极作为LIB阳极的电化学性能得到了全面的研究，它显示出显着的高倍率能力（1 C时的容量为169 mA hg ^-1 ，20 C时的容量为112 mA hg ^-1 ），以及稳定的循环寿命，10 C 下循环 5000 次后容量保持率为 86%，远优于 CC-LTO 同类产品。同时，采用 LiFePO ₄阴极和 CC-CNTs/LTO 阳极的全电池也表现出优异的循环稳定性（10 C 下循环 1500 次后容量保持率为 87%）。这些积极的特征表明它们在高功率储能领域的应用前景广阔。

更新日期：2018-01-03

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