View in EDS

Improved high-rate performance of Li4Ti5O12/carbon nanotube nanocomposite anode for lithium-ion batteries.

Saved in:
Bibliographic Details
Title: Improved high-rate performance of Li4Ti5O12/carbon nanotube nanocomposite anode for lithium-ion batteries.
Authors: Zhu, Yan-Rong1, Wang, Pengfei1, Yi, Ting-Feng1 tfyihit@163.com, Deng, Li1, Xie, Ying2 xieying@hlju.edu.cn
Source: Solid State Ionics. Aug2015, Vol. 276, p84-89. 6p.
Subjects: Performance evaluation, Lithium compounds, Carbon nanotubes, Nanocomposite materials, Lithium-ion batteries
Abstract: Li 4 Ti 5 O 12 nanosheet and Li 4 Ti 5 O 12 nanosheet/CNT nanocomposite were prepared in ethyl alcohol medium by a low-cost hydrothermal method. The CNTs are incorporated into the Li 4 Ti 5 O 12 nanosheet homogenously, and then provide a highly conductive network for electron transportation. Li 4 Ti 5 O 12 nanosheet/CNT composite with 4 wt.% CNTs exhibits excellent rate capability and superior cycle life between 1 and 2.5 V. Li 4 Ti 5 O 12 nanosheet/CNTs (4 wt.%) shows superior rate performance with discharge capacities of 137.5 mAh g − 1 at 2 C charge–discharge rate after 90 cycles and 128.3 mAh g − 1 at 3 C charge–discharge rate after 120 cycles. The significantly improved rate capability of the Li 4 Ti 5 O 12 nanosheet/CNT electrodes can be mainly ascribed to the reduced resistance and polarization and improved lithium diffusion coefficient. The same strategy adopted in this work could be helpful to develop advanced electrochemical energy storage systems with long cycle life and high rate performance. [ABSTRACT FROM AUTHOR]
Copyright of Solid State Ionics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Li 4 Ti 5 O 12 nanosheet and Li 4 Ti 5 O 12 nanosheet/CNT nanocomposite were prepared in ethyl alcohol medium by a low-cost hydrothermal method. The CNTs are incorporated into the Li 4 Ti 5 O 12 nanosheet homogenously, and then provide a highly conductive network for electron transportation. Li 4 Ti 5 O 12 nanosheet/CNT composite with 4 wt.% CNTs exhibits excellent rate capability and superior cycle life between 1 and 2.5 V. Li 4 Ti 5 O 12 nanosheet/CNTs (4 wt.%) shows superior rate performance with discharge capacities of 137.5 mAh g − 1 at 2 C charge–discharge rate after 90 cycles and 128.3 mAh g − 1 at 3 C charge–discharge rate after 120 cycles. The significantly improved rate capability of the Li 4 Ti 5 O 12 nanosheet/CNT electrodes can be mainly ascribed to the reduced resistance and polarization and improved lithium diffusion coefficient. The same strategy adopted in this work could be helpful to develop advanced electrochemical energy storage systems with long cycle life and high rate performance. [ABSTRACT FROM AUTHOR]
ISSN:01672738
DOI:10.1016/j.ssi.2015.04.001