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Free-Standing Li4Ti5O12/Carbon Nanotube Electrodes for Flexible Lithium-Ion Batteries

Authors :
Jun-Seok Lee
Sang-Du Yun
Oyunbayar Nyamaa
Jeong-Hyeon Yang
Sun-Chul Huh
Hyo-Min Jeong
Tae-Hyun Nam
Yeon-Ju Ryu
Jung-Pil Noh
Source :
Energies, Vol 15, Iss 22, p 8585 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

Lithium-ion batteries (LIBs) have been used in many fields, such as consumer electronics and automotive and grid storage, and its applications continue to expand. Several studies have attempted to improve the performance of LIBs. In particular, the use of high-capacity silicon and tin as anodes has been widely studied. Although anodes composed of silicone and tin have high theoretical capacities, poor electrical conductivity and considerable volume expansion of such anodes deteriorate the LIB performance. Thus, Li4Ti5O12 (LTO), a zero-strain material, has attracted much attention with high cycle stability and rate capability through improved electrical conductivity. However, LTO has the disadvantages of a low electrical conductivity (10−8 to 10−13 S cm−1) and moderate Li+ ion diffusion coefficient (10−9 to 10−16 cm2 s−1). In this study, the flexible and free-standing composite films were fabricated using only LTO and multi-walled carbon nanotube(CNT) with high electrical conductivity and ion diffusivity. The prepared LTO/CNT films showed a higher charge/discharge capacity than the theoretical capacity of the LTO electrode.

Details

Language :
English
ISSN :
19961073
Volume :
15
Issue :
22
Database :
Directory of Open Access Journals
Journal :
Energies
Publication Type :
Academic Journal
Accession number :
edsdoj.53cc28fb31d44cd8831c6aceaf540fc
Document Type :
article
Full Text :
https://doi.org/10.3390/en15228585