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Title: Structure-dependent performance of TiO 2/C as anode material for Na-ion batteries

Abstract

The performance of energy storage materials is highly dependent on their nanostructures. Herein, hierarchical rod-in-tube TiO 2 with a uniform carbon coating is synthesized as the anode material for sodium-ion batteries by a facile solvothermal method. This unique structure consists of a tunable nanorod core, interstitial hollow spaces, and a functional nanotube shell assembled from two-dimensional nanosheets. By adjusting the types of solvents used and reaction time, the morphologies of TiO 2/C composites can be tuned to nanoparticles, microrods, rod-in-tube structures, or microtubes. Among these materials, rod-in-tube TiO 2 with a uniform carbon coating shows the highest electronic conductivity, specific surface area (336.4 m(2) g(-1)), and porosity, and these factors lead to the best sodium storage capability. Benefiting from the unique structural features and improved electronic/ionic conductivity, the as-obtained rod-in-tube TiO2/C in coin cell tests exhibits a high discharge capacity of 277.5 and 153.9 mAh g(-1) at 50 and 5000 mA g(-1), respectively, and almost 100% capacity retention over 14,000 cycles at 5000 mA g(-1). In operando high-energy X-ray diffraction further confirms the stable crystal structure of the rod-in-tube TiO 2/C during Na+ insertion/extraction. This work highlights that nanostructure design is an effective strategy to achieve advanced energy storage materials.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Natural Science Foundation of China (NNSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technology - Battery Materials Research (BMR) Program
OSTI Identifier:
1422570
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nano Energy; Journal Volume: 44; Journal Issue: C
Country of Publication:
United States
Language:
English

Citation Formats

He, Hanna, Gan, Qingmeng, Wang, Haiyan, Xu, Gui-Liang, Zhang, Xiaoyi, Huang, Dan, Fu, Fang, Tang, Yougen, Amine, Khalil, and Shao, Minhua. Structure-dependent performance of TiO2/C as anode material for Na-ion batteries. United States: N. p., 2018. Web. doi:10.1016/j.nanoen.2017.11.077.
He, Hanna, Gan, Qingmeng, Wang, Haiyan, Xu, Gui-Liang, Zhang, Xiaoyi, Huang, Dan, Fu, Fang, Tang, Yougen, Amine, Khalil, & Shao, Minhua. Structure-dependent performance of TiO2/C as anode material for Na-ion batteries. United States. doi:10.1016/j.nanoen.2017.11.077.
He, Hanna, Gan, Qingmeng, Wang, Haiyan, Xu, Gui-Liang, Zhang, Xiaoyi, Huang, Dan, Fu, Fang, Tang, Yougen, Amine, Khalil, and Shao, Minhua. Thu . "Structure-dependent performance of TiO2/C as anode material for Na-ion batteries". United States. doi:10.1016/j.nanoen.2017.11.077.
@article{osti_1422570,
title = {Structure-dependent performance of TiO2/C as anode material for Na-ion batteries},
author = {He, Hanna and Gan, Qingmeng and Wang, Haiyan and Xu, Gui-Liang and Zhang, Xiaoyi and Huang, Dan and Fu, Fang and Tang, Yougen and Amine, Khalil and Shao, Minhua},
abstractNote = {The performance of energy storage materials is highly dependent on their nanostructures. Herein, hierarchical rod-in-tube TiO2 with a uniform carbon coating is synthesized as the anode material for sodium-ion batteries by a facile solvothermal method. This unique structure consists of a tunable nanorod core, interstitial hollow spaces, and a functional nanotube shell assembled from two-dimensional nanosheets. By adjusting the types of solvents used and reaction time, the morphologies of TiO2/C composites can be tuned to nanoparticles, microrods, rod-in-tube structures, or microtubes. Among these materials, rod-in-tube TiO2 with a uniform carbon coating shows the highest electronic conductivity, specific surface area (336.4 m(2) g(-1)), and porosity, and these factors lead to the best sodium storage capability. Benefiting from the unique structural features and improved electronic/ionic conductivity, the as-obtained rod-in-tube TiO2/C in coin cell tests exhibits a high discharge capacity of 277.5 and 153.9 mAh g(-1) at 50 and 5000 mA g(-1), respectively, and almost 100% capacity retention over 14,000 cycles at 5000 mA g(-1). In operando high-energy X-ray diffraction further confirms the stable crystal structure of the rod-in-tube TiO2/C during Na+ insertion/extraction. This work highlights that nanostructure design is an effective strategy to achieve advanced energy storage materials.},
doi = {10.1016/j.nanoen.2017.11.077},
journal = {Nano Energy},
number = C,
volume = 44,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2018},
month = {Thu Feb 01 00:00:00 EST 2018}
}