Amorphous Li4Ti5O12 Thin Film with Enhanced Lithium Storage Capability and Reversibility for Lithium‐Ion Batteries
Amorphous Li4Ti5O12 Thin Film with Enhanced Lithium Storage Capability and Reversibility for Lithium‐Ion Batteries
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DOI：
10.1002/ente.201402047
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发表时间：
2014-10
影响因子：
3.8
通讯作者：
Zhaozhe Yu;G. Zhu;Hua-rui Xu;A. Yu
中科院分区：
文献类型：
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作者：
Zhaozhe Yu;G. Zhu;Hua-rui Xu;A. Yu
本文重点研究了如何提高Li4Ti5O12薄膜的电子导电性和锂离子扩散率，这是固态锂离子电池发展的一个严重制约因素。基于这种理解，我们发现创造薄膜的非晶结构特征和分层通道形成了一个非常简单而有效的解决问题的方法。制备的薄膜具有独特的结构特征和高导电性，在10 μA cm−2下具有283.5 mAh g−1的高容量和良好的循环稳定性（在10 μA cm−2下循环100次后容量损失≈3%）。这些重要的发现为Li4Ti5O12在构建高性能无粘结剂储能器件方面开辟了新的机遇。
This manuscript focuses on how to improve the electronic conductivity and lithium-ion diffusivity of Li4Ti5O12 thin films, which present a serious constraint to the development of the solid-state lithium-ion batteries. Given this understanding, we have found that creating amorphous structural features and hierarchical channels of thin films form a very simple yet effective approach to solve the problem. The unique structural features and high electrical conductivity of the as-prepared thin films result in high capacity (283.5 mAh g−1 at 10 μA cm−2) and good cyclic stability (≈3 % capacity loss after 100 cycles at 10 μA cm−2). These important findings could open up new opportunities for Li4Ti5O12 in constructing high-performance binder-free energy storage devices.