Three-dimensional carbon nanotubes-encapsulated Li2FeSiO4 microspheres as advanced positive materials for lithium energy storage
| Autor: | Haiyan Yan, Yuqiao Fu, Xiuxiu Xue, Xinming Wu, Jingwei Dong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Battery (electricity) Materials science Process Chemistry and Technology Composite number chemistry.chemical_element 02 engineering and technology Carbon nanotube 021001 nanoscience & nanotechnology Thermal diffusivity 01 natural sciences Cathode Energy storage Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry Chemical engineering law Electrical resistivity and conductivity 0103 physical sciences Materials Chemistry Ceramics and Composites Lithium 0210 nano-technology |
| Zdroj: | Ceramics International. 46:9729-9733 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.12.241 |
| Popis: | Polyanion-type Li2FeSiO4 has been considered as an advanced positive material for lithium energy storage owing to the low cost, good safety and high theoretical capacity. Unfortunately, the inferior electrical conductivity and bad diffusivity of Li+ inhibit its widespread applications for lithium energy storage. In the present research, we have used the simple spray-drying route to fabricate the three-dimensional carbon nanotubes (3D CNTs) encapsulated Li2FeSiO4 microspheres (3D-Li2FeSiO4/CNTs). Benefiting from the interconnected conducting networks, the as-fabricated 3D-Li2FeSiO4/CNTs cathode displays superior battery property with a specific capacity of 169.1 mAh g−1 at 0.1C. Besides, it also delivers a discharge capacity of 104.1 mAh g−1 at 5C over 500 cycles with a capacity retention ratio of around 91.2%. The above results suggest that the designed 3D-Li2FeSiO4/CNTs composite is an advanced positive material in lithium energy storage. |
| Databáze: | OpenAIRE |
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