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Al–Si–graphite composite with low 7.9wt.% Si was synthesized by ball-milling eutectic Al–Si powder and graphite. Its reversible capacity remained above 0.65Ah/g after 10 cycles, corresponding to 1.6Ah/cm 3 , almost double that of graphite alone. Ex-situ XRD indicates that in Al–graphite the large volume change during lithium insertion/removal causes the active material to become isolated and...
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