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HIGHLY REVERSIBLE LITHIUM INTERCALATING ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREOF, ELECTRODE AND SECONDARY BATTERY COMPRISING THE SAME
HIGHLY REVERSIBLE LITHIUM INTERCALATING ELECTRODE ACTIVE MATERIAL, PREPARATION METHOD THEREOF, ELECTRODE AND SECONDARY BATTERY COMPRISING THE SAME
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机译:高度可逆的锂嵌入电极活性材料,其制备方法,电极和包含其的二次电池
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摘要
Disclosed are an electrode active material, having a composition of SnPx (0.9x0.98), 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 (0.9x0.98), the method comprising the steps of: preparing a mixed solution of an Sn precursor, trioctyl phosphine (TOP) and trioctyl phosphine oxide (TOPO); and heating the solution. The application of the teardrop-shaped single-crystal SnPO-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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