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Crystallized Lithium Titanate Nanosheets Prepared via Spark Plasma Sintering for Ultra-high Rate Lithium Ion Batteries

Abstract

This paper presents that a lithium titanate (LTO) nanosheet material is successfully prepared by a spark plasma sintering (SPS) method at 500 oC for only 5 minutes, using its nanosheet precursor synthesized by hydrothermal reaction. The pulsed electric field-induces the phase transition of the precursor at much lower temperature and in much shorter time during SPS process. Moreover, the thin layer morphology of LTO precursor can be well maintained after SPS treatment, which has been changed into nanoparticles during the conventional solid state calcination. The crystaline LTO nanosheets prepared by SPS deliver high specific capacities of 151.2 mAh g-1 and 147.2 mAh g-1 at high current densities of 8 A g-1 (45.7 C) and 10 A g-1 (57.1 C), respectively. Moreover, the LTO nanosheets displays stable capacity retentions of 73.9% and 75.6% after 1000 cycles under 1 A g-1 and 2 A g-1, respectively.

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Publication details

The article was received on 06 Nov 2018, accepted on 30 Nov 2018 and first published on 01 Dec 2018


Article type: Communication
DOI: 10.1039/C8TA10680K
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Crystallized Lithium Titanate Nanosheets Prepared via Spark Plasma Sintering for Ultra-high Rate Lithium Ion Batteries

    C. Han, J.Q. Li, T. Zhang, H. Li, R. Shi, J. Tong and B. Li, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA10680K

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