Exceptional electrochemical performance of nitrogen-doped porous carbon for lithium storage

Crumpled nitrogen-doped porous carbon sheets are successfully fabricated via chemical activation of polypyrrole-functionalized graphene sheets with KOH (APGs). The obtained APGs with nitrogen doping, high surface area, porous and crumpled structure exhibit exceptional electrochemical performances as the electrode material for LIBs, including a superhigh reversible specific capacity of 1516.2 mAh g−1, excellent cycling stability over 10,000 cycles, and good rate capability (133.2 mAh g−1 even at a very high current density of 40 A g−1). The chemical activation synthesis strategy might open new avenues for the design of high-performance carbon-based anode materials.