Boosting Li-ion storage kinetics via constructing layered TiO2 anode

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2024-06-06 DOI:10.1016/j.partic.2024.06.002

Jiyue Hou , Fei Wang , Enfeng Zhang , Ying Wang , Peng Dong , Yunxiao Wang , Yiyong Zhang , Xue Li , Yingjie Zhang

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Abstract

Due to the typical intercalation-deintercalation mechanism, TiO₂ holds great promise as a sustainable anode for next-generation lithium-ion batteries (LIBs). However, commercial TiO₂ (C–TiO₂) is granular and shows slow ionic conductivity, which greatly hinders its development due to sluggish kinetics, leading to low reversible capacity and inferior rate capability. In this study, a two-dimensional layered TiO₂ (L-TiO₂) anode is prepared via a one-step calcination process, which can effectively shorten the lithium ions diffusion path and improve its lithium ions conductivity. We elucidated the enhanced electrochemical performance of L-TiO₂ as an anode in LIBs through pseudocapacitive acceleration of lithium ions intercalation and deintercalation using various characterization techniques, including different scan rate cyclic voltammetry tests, in situ electrochemical impedance spectroscopy, in situ Raman spectroscopy, and in situ X-ray diffraction. In comparison to C–TiO₂ material, L-TiO₂ material showcases remarkable electrochemical performance, achieving a capacity of 166 mAh/g after 100 cycles at 0.1 C. Additionally, the lithium-ion diffusion coefficient calculated for the L-TiO₂ is two orders of magnitude greater, underscoring its potential as a negative electrode material for LIBs.

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通过构建层状二氧化钛阳极提高锂离子存储动力学

由于典型的插层-插层机制，二氧化钛有望成为下一代锂离子电池（LIB）的可持续负极。然而，商用二氧化钛（C-TiO2）呈颗粒状，离子传导速度慢，由于动力学缓慢，导致可逆容量低、速率能力差，极大地阻碍了其发展。本研究通过一步煅烧工艺制备了二维层状 TiO2（L-TiO2）负极，可有效缩短锂离子扩散路径，提高其锂离子传导性。我们利用不同的表征技术，包括不同扫描速率的循环伏安测试、原位电化学阻抗谱、原位拉曼光谱和原位 X 射线衍射，阐明了 L-TiO2 作为锂离子电池负极通过伪电容加速锂离子插层和脱插层而提高电化学性能的原理。与 C-TiO2 材料相比，L-TiO2 材料显示出卓越的电化学性能，在 0.1 C 下循环 100 次后，容量达到 166 mAh/g。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.