阳极
材料科学
纳米线
锂(药物)
钛酸锂
电化学
锂离子电池
相(物质)
化学工程
纳米结构
纳米技术
电池(电)
离子
电极
化学
有机化学
物理化学
工程类
内分泌学
功率(物理)
物理
医学
量子力学
作者
Jie Zhang,Chen Zhou,Viktor Naenen,Lee-Woon Jang,Jean‐Pierre Locquet,Jin Won Seo
标识
DOI:10.1016/j.jallcom.2021.160038
摘要
A facile method to synthesize dual phase Li4Ti5O12-TiO2 nanowires and their performance as anode material for lithium-ion battery are investigated. Li4Ti5O12-TiO2 nanowires are obtained from titanium nanoparticles by applying the wet corrosion process for the nanostructure formation and subsequent ion exchange processes. Post-heat treatments are adopted to tune the mixed phase composition of the nanowires, which significantly influences the electrochemical performance. The dual phase nanowires-based anode materials with a TiO2: Li4Ti5O12 phase ratio of 7:3 exhibit the highest delithiation capacity of 180 mAh/g and 105 mAh/g at 0.5 C and 5 C, respectively. In addition, it shows a remarkable capacity retention of ~95% after 150 cycles at 5 C, which is a significant improvement compared to previous reports on Li4Ti5O12-TiO2 based anode materials synthesized at low temperatures. This dual phase anode material based on Li4Ti5O12-TiO2 nanowires combines two advantages: i) High aspect ratio nanostructures increase the surface area and shorten the diffusion path of lithium ions and ii) the dual phase accelerates ion/electron migration owing to abundant interfaces/grain boundaries. Consequently, the proposed synthesis route for Li4Ti5O12-TiO2 nanowires provides an effective and highly reproducible approach to fabricate dual phase Li4Ti5O12-TiO2 nanowires as anode materials for lithium ion batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI