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Chem Commun (Camb). 2016 Oct 18;52(85):12618-12621.

A comparative study of graphite electrodes using the co-intercalation phenomenon for rechargeable Li, Na and K batteries.

Author information

1
Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 599, Gwanak-gu, Seoul 151-742, Republic of Korea.
2
Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM), Seoul National University, Gwanak-ro 599, Gwanak-gu, Seoul 151-742, Republic of Korea and Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul National University, Gwanak-ro 599, Gwanak-gu, Seoul 151-742, Republic of Korea. matlgen1@snu.ac.kr.

Abstract

Here, we demonstrate that graphite can serve as a versatile electrode for various rechargeable battery types by reversibly accommodating solvated alkali ions (such as K, Na, and Li) through co-intercalation in its galleries. The co-intercalation of alkali ions is observed to occur via staging reactions. Notably, their insertion behaviors, including their specific capacity, are remarkably similar regardless of the alkali ion species despite the different solubility limits of K, Na, and Li ions in graphite. Nevertheless, the insertion potentials of the solvated alkali ions differ from each other and are observed to be correlated with the interlayer distance in the intercalated graphite gallery.

PMID:
27709171
DOI:
10.1039/c6cc05362a
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