Amorphous and crystalline TiO2 nanoparticle negative electrodes for sodium-ion batteries
Abstract
Titanium dioxide (TiO2) is a promising negative electrode for sodium ion batteries (SIBS). Although TiO2 materials with amorphous (A-TiO2) and single-phase crystalline structures (C-TiO2) have been separately explored, the study to compare the fundamental electrochemistry of A-TiO2 and C-TiO2 is limited. In this work, we investigated A-TiO2 and C-TiO2 nanoparticles with identical chemical composition and morphology. C-TiO2 exhibits enhanced electrochemical performance than A-TiO2 in terms of rate capability and cycle life. Cyclic voltammetry (CV) analysis suggests reversible Na ion insertion/extraction in C-TiO2. However, such process is irreversible in the case of A-TiO2. The charge storage mechanisms in both samples were studied to show that diffusion-controlled intercalation process becomes significant in C-TiO2 sample. The C-TiO2 sample has a better Na+ diffusivity measured through the galvanostatic intermittent titration technique (GITT) compared to A-TiO2, which corroborates well with the rate capability study. Furthermore, the evolution of local structure of the TiO2 samples was analyzed by ex situ pair distribution function (PDF) to understand the variation in electrochemical properties. In conclusion, it reveals that the corner-shared Ti-Ti distance along Na ion diffusion pathway increases with the increase of crystallinity, leading to the expanded diffusion channels and therefore more active sites and faster diffusion.
- Authors:
-
- Boise State Univ., Boise, ID (United States). Micron School of Materials Science and Engineering
- Argonne National Lab. (ANL), Lemont, IL (United States). Center for Nanoscale Materials
- Argonne National Lab. (ANL), Lemont, IL (United States). X-ray Science Div.
- Univ. of California, Riverside, CA (United States). Dept. of Chemistry
- Boise State Univ., Boise, ID (United States). Micron School of Materials Science and Engineering; Univ. of California, Riverside, CA (United States). Dept. of Chemistry
- (Claire) [Boise State Univ., Boise, ID (United States). Micron School of Materials Science and Engineering
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1574300
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Electrochimica Acta
- Additional Journal Information:
- Journal Volume: 321; Journal Issue: C; Journal ID: ISSN 0013-4686
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; Amorphous; Crystalline; Nanoparticles; Sodium ion batteries; TiO2
Citation Formats
Deng, Changjian, Ma, Chunrong, Lau, Miu Lun, Skinner, Paige, Liu, Yuzi, Xu, Wenqian, Zhou, Hua, Ren, Yang, Yin, Yadong, Williford, Bethany, Dahl, Michael, and Xiong, Hui. Amorphous and crystalline TiO2 nanoparticle negative electrodes for sodium-ion batteries. United States: N. p., 2019.
Web. doi:10.1016/j.electacta.2019.134723.
Deng, Changjian, Ma, Chunrong, Lau, Miu Lun, Skinner, Paige, Liu, Yuzi, Xu, Wenqian, Zhou, Hua, Ren, Yang, Yin, Yadong, Williford, Bethany, Dahl, Michael, & Xiong, Hui. Amorphous and crystalline TiO2 nanoparticle negative electrodes for sodium-ion batteries. United States. https://doi.org/10.1016/j.electacta.2019.134723
Deng, Changjian, Ma, Chunrong, Lau, Miu Lun, Skinner, Paige, Liu, Yuzi, Xu, Wenqian, Zhou, Hua, Ren, Yang, Yin, Yadong, Williford, Bethany, Dahl, Michael, and Xiong, Hui. Mon .
"Amorphous and crystalline TiO2 nanoparticle negative electrodes for sodium-ion batteries". United States. https://doi.org/10.1016/j.electacta.2019.134723. https://www.osti.gov/servlets/purl/1574300.
@article{osti_1574300,
title = {Amorphous and crystalline TiO2 nanoparticle negative electrodes for sodium-ion batteries},
author = {Deng, Changjian and Ma, Chunrong and Lau, Miu Lun and Skinner, Paige and Liu, Yuzi and Xu, Wenqian and Zhou, Hua and Ren, Yang and Yin, Yadong and Williford, Bethany and Dahl, Michael and Xiong, Hui},
abstractNote = {Titanium dioxide (TiO2) is a promising negative electrode for sodium ion batteries (SIBS). Although TiO2 materials with amorphous (A-TiO2) and single-phase crystalline structures (C-TiO2) have been separately explored, the study to compare the fundamental electrochemistry of A-TiO2 and C-TiO2 is limited. In this work, we investigated A-TiO2 and C-TiO2 nanoparticles with identical chemical composition and morphology. C-TiO2 exhibits enhanced electrochemical performance than A-TiO2 in terms of rate capability and cycle life. Cyclic voltammetry (CV) analysis suggests reversible Na ion insertion/extraction in C-TiO2. However, such process is irreversible in the case of A-TiO2. The charge storage mechanisms in both samples were studied to show that diffusion-controlled intercalation process becomes significant in C-TiO2 sample. The C-TiO2 sample has a better Na+ diffusivity measured through the galvanostatic intermittent titration technique (GITT) compared to A-TiO2, which corroborates well with the rate capability study. Furthermore, the evolution of local structure of the TiO2 samples was analyzed by ex situ pair distribution function (PDF) to understand the variation in electrochemical properties. In conclusion, it reveals that the corner-shared Ti-Ti distance along Na ion diffusion pathway increases with the increase of crystallinity, leading to the expanded diffusion channels and therefore more active sites and faster diffusion.},
doi = {10.1016/j.electacta.2019.134723},
journal = {Electrochimica Acta},
number = C,
volume = 321,
place = {United States},
year = {Mon Aug 19 00:00:00 EDT 2019},
month = {Mon Aug 19 00:00:00 EDT 2019}
}
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