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Aqueous Synthesized Nanostructured Li4Ti5O12 for High-Performance Lithium Ion Battery Anodes.
- Source :
- Journal of The Electrochemical Society; 2013, Vol. 160 Issue 5, pA3041-A3047, 7p
- Publication Year :
- 2013
-
Abstract
- Nanostructured Li<subscript>4</subscript>Ti<subscript>5</subscript>O<subscript>12</subscript> (LTO) was prepared via a novel process comprising low-temperature (<100°C) aqueous synthesis and annealing of the hydrous intermediate phase Li<subscript>1.81</subscript>H<subscript>0.19</subscript>Ti<subscript>2</subscript>O<subscript>5</subscript>·2H<subscript>2</subscript>O (LTH) using only LiOH and TiCl<subscript>4</subscript> as precursors. Nanosheet-structured LTH converted to either LTO nanosheets (102 m²·g<superscript>-1</superscript>) or LTO nanoparticles (28 m²·g<superscript>-1</superscript>) upon annealing at 400 and 600°C respectively, each exhibiting unique electrochemical performance properties. The nanosheet-structured LTO exhibited higher initial charge capacity (228.3 vs. 187.3 mAh ·g<superscript>-1</superscript> at 1.0 V cutoff and C/24 rate) than the nanoparticle-structured LTO. Furthermore, the LTO nanosheets taking advantage of their short diffusion path exhibited better rate capability than the LTO nanoparticles; for example their discharge capacity at 15 C was 115 mAh ·g<superscript>-1</superscript> vs. 68.4 mAh ·g<superscript>-1</superscript> at 1.2 V cutoff for the LTO nanoparticles. Meanwhile, the LTO nanoparticles exhibited better cyclability than the LTO nanosheets because of their higher crystallinity. Thus after 130 1 C cycles with cut off at 1.2 V (vs. Li/Li<superscript>+</superscript>), the discharge capacity of the nanosheets was 132.9 mAh ·g<superscript>-1</superscript> while that of nanoparticles was 150.7 mAh ·g<superscript>-1</superscript>, corresponding to 85 and 97% discharge capacity retention respectively. The newly synthesized nanostructured LTO material can offer a low cost scalable solution for high-performance LIB anodes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00134651
- Volume :
- 160
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- Journal of The Electrochemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 88162561
- Full Text :
- https://doi.org/10.1149/2.008305jes