TY - JOUR
T1 - Facile synthesis of surface fluorinated-Li4Ti5O12/carbon nanotube nanocomposites for a high-rate capability anode of lithium-ion batteries
AU - Jang, Il Seop
AU - Hui Kang, Seo
AU - Chan Kang, Yun
AU - Roh, Kwang Chul
AU - Chun, Jinyoung
N1 - Funding Information:
This work was supported by a grant from the Fundamental R&D program funded by the Korea Institute of Ceramic Engineering and Technology (KICET) and the Ministry of Trade, Industry and Energy (MOTIE), Republic of Korea (Project No. KPP22009). This work was also supported by the Technology Innovation Program (20010960) funded by the MOTIE, Republic of Korea.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/15
Y1 - 2022/12/15
N2 - Lithium titanate (Li4Ti5O12, LTO) with a spinel structure has attracted considerable attention as a promising anode material for application in lithium-ion batteries (LIBs) with high stability and long cycle life. However, the rate characteristics of the battery deteriorate due to its low electronic conductivity. In this study, a uniform nanocomposite was easily obtained by complexing bulk LTO particles and carbon nanotubes (CNTs) via mechanofusion. Additionally, without using hazardous reagents, the surface of the LTO/CNT nanocomposites could be easily fluorinated via a simple post-treatment using ammonium fluoride (NH4F). It was demonstrated that the degree of fluorination of the LTO/CNT nanocomposites could be easily controlled by adjusting the amount of NH4F. The surface fluorinated-LTO/CNT nanocomposites, in which the main strategies for improving electrical conductivity were introduced simultaneously, showed excellent electrochemical performance as anodes for LIBs. In particular, the optimized surface fluorinated-LTO/CNT nanocomposites not only exhibited a high specific capacity of 170.2 mAh g−1 at 0.2 C, but also maintained a capacity of ∼140 mAh g−1 at a high rate of 20 C, which was almost 2.3 times higher than that of bulk LTO particles.
AB - Lithium titanate (Li4Ti5O12, LTO) with a spinel structure has attracted considerable attention as a promising anode material for application in lithium-ion batteries (LIBs) with high stability and long cycle life. However, the rate characteristics of the battery deteriorate due to its low electronic conductivity. In this study, a uniform nanocomposite was easily obtained by complexing bulk LTO particles and carbon nanotubes (CNTs) via mechanofusion. Additionally, without using hazardous reagents, the surface of the LTO/CNT nanocomposites could be easily fluorinated via a simple post-treatment using ammonium fluoride (NH4F). It was demonstrated that the degree of fluorination of the LTO/CNT nanocomposites could be easily controlled by adjusting the amount of NH4F. The surface fluorinated-LTO/CNT nanocomposites, in which the main strategies for improving electrical conductivity were introduced simultaneously, showed excellent electrochemical performance as anodes for LIBs. In particular, the optimized surface fluorinated-LTO/CNT nanocomposites not only exhibited a high specific capacity of 170.2 mAh g−1 at 0.2 C, but also maintained a capacity of ∼140 mAh g−1 at a high rate of 20 C, which was almost 2.3 times higher than that of bulk LTO particles.
KW - Fluorination
KW - LiTiO/CNT
KW - Lithium-ion batteries
KW - Mechanofusion
KW - Nanocomposite
UR - http://www.scopus.com/inward/record.url?scp=85137264329&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2022.154710
DO - 10.1016/j.apsusc.2022.154710
M3 - Article
AN - SCOPUS:85137264329
SN - 0169-4332
VL - 605
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 154710
ER -