Abstract
The capacity of pure LiFePO 4 faded gradually from initial 149 mAh g −1–117 mAh g −1 under current density of 30 mA g −1 at room temperature after 60 cycles. Some obvious cracks are observed in LiFePO 4 particles after cycling. The formation of cracks would lead to poor electric contact and capacity fading. A possible mechanism is proposed for the appearance of the cracks.
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