Multi-walled carbon nanotubes (MWNTs) was added into LiFePO4 as composite electrodes of lithium battery by ball milling. The charge-discharge capacity, cyclic voltammetry, cycle life, alternating current impedance and discharge temperatures characteristic are investigated. The composite electrode with 10% MWNTs adding quality exhibits a superior charge-discharge performance, and has initial charge capacities of 148 mAhg-1 and discharge capacities of 145 mAhg-1 respectively in the initial cycle at 0.1C charge-discharge rate. And the discharge capacity is 135 mAhg-1 at 0.5C rate and 124 mAhg-1 at 1.5C rate. The resistance values of LiFePO4/MWNTs composite electrode adding MWNTs quantity from 0% to 20% have a significant decrease and the capacity holding is 90% after 80 cycles. The discharge capacity of composite electrode increases with increasing temperatures from 0 to 60?, and maximal value is 153 mAhg-1 in the temperature of 60? and has better performance of high temperature.

ELectrochemical performance of LiFePO<sub>4</sub>/ carbon nanotubes composite electrodes for Li-ion batteries

244th National Meeting (2012)

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ELectrochemical performance of LiFePO4/ carbon nanotubes composite electrodes for Li-ion batteries

ELectrochemical performance of LiFePO₄/ carbon nanotubes composite electrodes for Li-ion batteries