Operando Studies Reveal Structural Evolution with Electrochemical Cycling in Li–CoS2
Autor: | Mahalingam Balasubramanian, Karena W. Chapman, Olaf J. Borkiewicz, Peter J. Chupas, Anna J. Lehner, Claudia Göbel, Ram Seshadri, Megan M. Butala, Kamila M. Wiaderek, Shiri Arnon, Vicky V. T. Doan-Nguyen, Margaret A. Lumley |
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Rok vydání: | 2018 |
Předmět: |
Materials science
Intercalation (chemistry) Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Redox Energy storage 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion General Energy Electrode Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Absorption (electromagnetic radiation) |
Zdroj: | The Journal of Physical Chemistry C. 122:24559-24569 |
ISSN: | 1932-7455 1932-7447 |
Popis: | The drive toward high energy density alternatives to Li-ion batteries has led to great interest in energy storage materials not inherently constrained by the capacity limits of the currently employed intercalation electrode materials. Among the alternatives under consideration are electrode materials with theoretical capacities many times greater than intercalation electrodes that store charge through so-called conversion reactions. However, the significant structural changes that enable the high theoretical capacity of conversion systems contribute to issues of poor efficiency and short cycle life. To better understand cycling issues in conversion systems, we study the local structure evolution of CoS2 during Li storage. Being metallic and potentially capable of redox on both anion and cation sites, CoS2 would be expected to display promise as a cathode material. Through combined ex situ X-ray absorption near-edge spectroscopy and pair distribution function analysis from operando X-ray total scattering, ... |
Databáze: | OpenAIRE |
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