二氧化钛基钠离子电池负极材料研究进展

doi:10.13208/j.electrochem.180547

摘要/Abstract

摘要： 二氧化钛（TiO₂）是一种稳定、廉价、无毒的钠离子电池负极材料，具有良好的应用前景．然而其导电性较低，限制了其电化学活性（比容量）和倍率特性，阻碍了其规模化应用．本文系统总结了微观结构调控、引入氧缺陷、异质元素掺杂和纳米复合等策略对TiO₂导电性和电化学性能的影响．最后，文章展望了TiO₂基钠离子电池负极材料的发展方向．

关键词: 二氧化钛, 钠离子电池, 纳米复合材料, 掺杂, 氧缺陷

Abstract: Titanium dioxide (TiO₂) represents a stable, low-cost, and nontoxic anode material for sodium-ion batteries (SIBs). However, the low electrical conductivity limits its electrochemical activity (specific capacity) and rate capability, hindering its widespread applications. In this article, we show that different crystal forms of TiO₂ have different pore structures, resulting in the distinct sodium storage capacities. Accordingly, the article introduces how TiO₂ microstructures influence sodium storage. The nanoparticle structure can improve the rate performance of the material due to its short ion diffusion distance, and the internal cavity of the hollow structure is beneficial to cycle stability. In addition, we conclude that the conductivity of the material can be enhanced by oxygen defects or doping metals/non-metals. Lots of experimental results show that TiO₂ with carbon or metal composite structures has excellent electrochemical performance. In brief, this article comprehensively summarizes the effects of microstructure, oxygen vacancy, doping, and compositing on the conductivity and electrochemical performances of TiO₂-based anode materials. Beyond that, future research directions for TiO₂-based anode materials are also predicted at the end of this review.

Key words: TiO₂, sodium-ion battery, nanocomposites, doping, oxygen vacancy

中图分类号:

O646
TM912

廉思甜, 吕建帅, 于强, 胡光武, 陈卓, 周亮, 麦立强. 二氧化钛基钠离子电池负极材料研究进展[J]. 电化学（中英文）, 2019, 25(1): 31-44.

LIAN Si-tian, LV Jian-shuai, YU Qiang, HU Guang-wu, CHEN Zhuo, ZHOU Liang, MAI Li-qiang. Recent Progress on TiO₂-Based Anode Materials for Sodium-Ion Batteries[J]. Journal of Electrochemistry, 2019, 25(1): 31-44.

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