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Electrochemical and structural characterization of lithium titanate electrodes

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Abstract

Lithium titanate (LTO) materials of different particle size, surface area, and morphology were characterized by constant current cycling and cyclic voltammetry. By examining the particles and electrodes with scanning electron microscopy, we show that particle morphology, in addition to particle size, has important implications for high-rate performance. Large agglomerates, even when porous and made of small crystallites, cannot effectively form homogenous electrodes with the polymer binder and carbon conducting diluents; hence, low power performance results. Another nanostructured LTO of very high surface area was found to have poor electrochemical performance most likely due to its high concentration of structural defects. We recommend further development in nanoparticles of LTO of optimal crystallinity as well as improved electrode homogeneity through the use of more compatible binders and conducting diluents and better electrode processing techniques. Simultaneous realization of these imperatives should facilitate the development of LTO-based high-power batteries for automotive applications.

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Authors and Affiliations

  1. HRL Laboratories LLC, Malibu, CA, 90265, USA

    Ping Liu & Elena Sherman

  2. General Motors Corporation, Warren, MI, 48090, USA

    Mark Verbrugge

Authors
  1. Ping Liu
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  2. Elena Sherman
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  3. Mark Verbrugge
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Correspondence to Ping Liu.

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Liu, P., Sherman, E. & Verbrugge, M. Electrochemical and structural characterization of lithium titanate electrodes. J Solid State Electrochem 14, 585–591 (2010). https://doi.org/10.1007/s10008-009-0815-4

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  • DOI: https://doi.org/10.1007/s10008-009-0815-4

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