A Mechanism of Lithium Storage in Disordered Carbons

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Science  22 Apr 1994:
Vol. 264, Issue 5158, pp. 556-558
DOI: 10.1126/science.264.5158.556


High-resolution electron microscopy and lithium-7 nuclear magnetic resonance measurements were carried out for a disordered carbon material, prepared by heat treatment of polyphenylene, in which lithium was stored electrochemically. The nuclear magnetic resonance spectrum suggests the existence of Li2 covalent molecules in the carbon material. This extra covalent site of lithium storage promises extraordinarily high energy density for secondary batteries.