Abstract
Low dimensional Si-based materials are very promising anode candidates for the next-generation lithium-ion batteries. However, to satisfy the ever-increasing demand in more powerful energy storage devices, electrodes based on Si materials should display high-power accompanied with low volume change upon operation. Thus far, there were no reports on the Si-based materials which satisfy the stated requirements. Hence, here, we report on modified onion-structured Si nanoparticles (SiNPs) co-coated with Li4Ti5O12 (LTO) and cyclized polyacrylonitrile (cPAN) to bring the synergistic effect enhancing the conductivity, tolerance to volume change and stable performance. Obtained results suggest that the nanoparticles were conformally coated with both materials simultaneously and the thicknesses of the films were in a range of a few nanometers. Electrochemical tests show that the modified SiNPs deliver a high initial capacity of 2443 mAh g-1 and stable capacity retention over 50 cycles with 95% Coulombic efficiency.
| Original language | English |
|---|---|
| Article number | 1995 |
| Pages (from-to) | 1-10 |
| Number of pages | 10 |
| Journal | Nanomaterials |
| Volume | 10 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 10 2020 |
Funding
Funding: This research was funded by the research grant AP05133706 “Innovative high-capacity anodes based on lithium titanate for a next generation of batteries” from the Ministry of Education and Science of the Republic of Kazakhstan and #110119FD4504 “Development of 3D solid state thin film materials for durable and safe Li-ion microbatteries” from Nazarbayev University.
| Funders | Funder number |
|---|---|
| Nazarbayev University | |
| Ministry of Education and Science of the Republic of Kazakhstan | 110119FD4504 |
Keywords
- CPAN
- Energy storage
- LTO
- Nanostructures
- Onion-like structure
- Silicon nanoparticles
ASJC Scopus subject areas
- General Chemical Engineering
- General Materials Science
