Abstract
Glycine is pretreated and then carbonized to obtain a nitrogen-rich porous carbon materials (N-HPC materials). The N-HPC materials, with rich porous structure, can efficiently host tin oxide. The abundant nitrogen content (18.32 at％) in the N-HPC materials can shorten the diffusion distance of lithium, provide a large number of lithium ion storage sites, and enhance the conductivity. More importantly, the N-HPC materials, with high specific surface area (752 m2/g), can load tin oxide up to 1.83 mg/cm2. Further electrochemical testing, the SnO2/N-HPC battery has shown high specific capacity (1774.45 mA h g−1 of 100 mA g−1), excellent cycle performance (1492.92 mA h g−1 after 100 cycles), excellent coulombic efficiency(99.78 %) and low internal resistance.
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