Facile synthesis of dual-phase lithium titanate nanowires as anode materials for lithium-ion battery
| Autor: | Chen Zhou, Jin Won Seo, Viktor Naenen, Jean-Pierre Locquet, Jie Zhang, Lee Woon Jang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science Mechanical Engineering Metals and Alloys Nanowire chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Lithium-ion battery 0104 chemical sciences Anode chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Phase (matter) Materials Chemistry Lithium 0210 nano-technology Lithium titanate |
| Zdroj: | Journal of Alloys and Compounds. 875:160038 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.160038 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect