Constructing Gradient Porous Structure in Thick Li4Ti5O12 Electrode for High-Energy and Stable Lithium-Ion Batteries,ACS Sustainable Chemistry & Engineering

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Constructing Gradient Porous Structure in Thick Li4Ti5O12 Electrode for High-Energy and Stable Lithium-Ion Batteries
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-11-09 , DOI: 10.1021/acssuschemeng.0c04716
Wenwen Deng ₁ , Weibo Shi ₁ , Qiuju Liu ₁ , Jiayue Jiang ₁ , Xiuwan Li ₂ , Xuyong Feng ₃

Affiliation

The manufacturing process for electrodes in lithium-ion batteries generally results in a nonuniform microstructure geometrically distributed in the through-thickness direction of an electrode. A porous structure was designed to decrease tortuosity and increase Li⁺ penetration in a thick Li₄Ti₅O₁₂ (LTO) electrode. By using NaCl as a template, the porous LTO electrode with a high mass loading of 12 mg cm^–2 was fabricated. Electrochemical performance for the LTO electrode with different porosities was comparatively studied. To achieve higher volume energy density, a gradient porous LTO electrode was prepared. As a result, the thick LTO electrode with a high mass loading of 20 mg cm^–2 can deliver a high capacity of 150 mAh g^–1 at 1 C with almost no ohmic drop under charge/discharge for 40 cycles.

中文翻译：

在高能稳定锂离子电池用厚Li ₄ Ti ₅ O ₁₂电极中构建梯度多孔结构

锂离子电池中电极的制造过程通常会导致在电极的整个厚度方向上几何分布不均匀的微观结构。设计了多孔结构，以降低曲折度并增加在厚Li ₄ Ti ₅ O ₁₂（LTO）电极中的Li ⁺渗透性。以NaCl为模板，制造了质量负载为12 mg cm ^-2的多孔LTO电极。比较研究了不同孔隙度的LTO电极的电化学性能。为了获得更高的体积能量密度，制备了梯度多孔LTO电极。结果，厚的LTO电极具有20 mg cm ^–2的高质量负载可以在1 C下提供150 mAh g ^–1的高容量，在40个循环的充电/放电过程中几乎没有欧姆降。

更新日期：2020-11-23

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