Highly reversible lithium intercalating electrode active...

Details Highly reversible lithium intercalating electrode active... Highly reversible lithium intercalating electrode active...

2007-08-23

2011-11-29

Anthony, Joseph D (Department: 1761)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S209000, C429S217000, C429S231700, C429S231800, C252S519140, C252S520100, C423S305000, C423S299000, C204S280000

Reexamination Certificate

active

08067116

ABSTRACT:
Disclosed are an electrode active material, having a composition of SnPx (0.9≦x≦0.98), an electrode comprising the same, and a lithium secondary battery comprising the electrode. Also disclosed is a method for preparing an electrode active material having a composition of SnPx (0.9≦x≦0.98), the method comprising the steps of: preparing a mixed solution of a Sn precursor, trioctyl phosphine (TOP) and trioctyl phosphine oxide (TOPO); and heating the solution. The application of the teardrop-shaped single-crystal SnP0-94 particles as an anode active material for lithium secondary batteries can provide an anode having very excellent cycling properties because the active material has a reversible capacity, which is about two times as large as that of a carbon anode, along with a very low irreversible capacity, and it is structurally very stable against Li ion intercalation/deintercalation in a charge/discharge process, indicating little or no change in the volume thereof.

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Article entitled: “The Synthesis, Structure, and Superconducting Properties of New-Pressure Forms of Tin Phosphide”, by P.C. Donohue; taken from New High-Pressure Forms of SnP, vol. 9, No. 2, Feb. 1970.
Zhou, et al., “Superior High Rate Capability Of Tin Phosphide Used As High Capacity Anode For Aqueous Primary Batteries”, Electrochemistry Communications 8, pp. 55-59, 2006.
Kim, et al., “Enhancement of Capacity and Cycle-Life of Sn4 = δP3 (0 ≦δ≦1) Anode For Lithium Secondary Batteries”, Journal of Power Sources 141, pp. 163-166, 2005.

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