Effects of carbon nanotubes, graphene and titanium suboxides on electrochemical properties of V2Al1-CT ceramic as an anode for lithium-ion batteries
| Autor: | Ling Xu Yang, R. Liu, Xue Zhang, Hui Jun Liu, Chao Liu Zeng, Ying Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Graphene Process Chemistry and Technology chemistry.chemical_element Carbon nanotube Electrochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode law.invention chemistry Chemical engineering law Etching (microfabrication) visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Lithium Ceramic Titanium |
| Zdroj: | Ceramics International. 47:35081-35088 |
| ISSN: | 0272-8842 |
| Popis: | Partially-etched V2Al1-xCTz ceramic with the average particle of ∼400 nm was synthesized by etching submicro-sized V2AlC with 40 wt% HF at room temperature (RT) for 48 h and 72 h, respectively. V2Al1-xCTz etched for 72 h has exhibited higher charge-discharge property, with an average reversible discharge capacity of 349.2 mAh·g-1 at 0.1 A g-1 in the 120 cycles for lithium-ion batteries. The electrochemical performances of V2Al1-xCTz could be improved by the addition of carbon nanotubes (CNTs), graphene (GF) and titanium suboxides (Ti4O7) conductive additives, among which CNTs exhibit the best effectiveness with a capacity of ∼460 mAh·g-1 at 0.1 A g-1 in the 140 cycles and a capacity retention of ∼72% at 0.5 A g-1 after 400 cycles. |
| Databáze: | OpenAIRE |
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