The effect of boron substitution in carbon on the intercalation of lithium in Li[sub x](B[sub z]C[sub 1[minus]z])[sub 6]

Journal Article · Fri Apr 01 04:00:00 EST 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2054856· OSTI ID:7107817

Way, B M; Dahn, J R ^[1]

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1. Simon Fraser Univ., Burnaby, British Columbia (Canada). Dept. of Physics

Boron-substituted carbons, B[sub z]C[sub 1[minus]z], have been produced by chemical vapor deposition from benzene and boron trichloride precursors at 900 C. The voltage and reversible capacity of Li/Li[sub x](B[sub z]C[sub 1[minus]z])[sub 6] cells were measured for the range of boron concentrations 0 < z < 0.17. These cells show an increase in voltage for a given lithium concentration compared to that in a cell with a pure carbon anode (i.e., petroleum coke, graphite, etc.). In addition, all cells for z > 0 showed greater reversible capacities than Li/coke cells, and for z > 0.10 the capacities exceeded that of graphite. For example, for B[sub 0.17]C[sub 0.83] the reversible specific capacity was 437 mAh/g. This behavior is understood by treating boron as an electron acceptor in the carbon lattice. These materials appear to be promising candidates for anode sin lithium ion rechargeable batteries.

• OSTI ID: 7107817
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:4; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

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