An in situ self-developed graphite as high capacity anode of lithium-ion batteries

Graphite with a large inter-planar distance (0.357 nm) was obtained from pig bone. It delivered an improving specific capacity which increased continuously to 538 mA h g−1 at 1 A g−1 after 1000 cycles. With microscopic characterization, it has been found that the pig-bone-based graphite was exfoliated to graphene during the charge–discharge process.