ONION-STRUCTURED SI ANODE CONSTRUCTED WITH COATING BY LI4TI5O12 AND CYCLIZED-POLYACRYLONITRILE FOR LITHIUM-ION BATTERIES
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Date
2020-10-10
Authors
Nurpeissova, Arailym
Mukanova, Aliya
Kalimuldina, Gulnur
Umirov, Nurzhan
Kim, Sung-Soo
Bakenov, Zhumabay
Journal Title
Journal ISSN
Volume Title
Publisher
Nanomaterials
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
Description
Keywords
silicon nanoparticles, LTO, cPAN, onion-like structure, nanostructures, energy storage, Type of access: Open Access
Citation
Nurpeissova, A., Mukanova, A., Kalimuldina, G., Umirov, N., Kim, S.-S., & Bakenov, Z. (2020). Onion-Structured Si Anode Constructed with Coating by Li4Ti5O12 and Cyclized-Polyacrylonitrile for Lithium-Ion Batteries. Nanomaterials, 10(10), 1995. doi:10.3390/nano10101995