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ABSTRACT
Fe1-xC decorated Nitrogen doped carbon nanosheets (Fe1-xC@C) with a highly porous nanostructure are successfully synthetized through a facile two-step process: fabricating Fe1-xC@C nanosheets by pyrolysis polyacrylonitrile (PAN) and subsequently etched by acid. The as-prepared Fe1-xC@C composites delivers a reversible capacity of 125.2 mAh g−1 at the current density of 500 mA g−1. As anode of sodium ion battery, the capacity retention 88.5% after 800 cycles, and a rate capability is 75 mAh g−1 at 3A g−1. This simple scalable and low cost synthesis approach will provide a new strategy for the fabrication of NIBs anode.
Additional information
Funding
We acknowledge the financial support from the National Natural Science Foundation of China (21572269, 21302224 and 21436003), and the Fundamental Research Funds for the Central Universities (17CX05015, 15CX08005A), Key Research and Development Program of Shandong Province, China (2017GGX40118) and Qingdao Science and Technology Plan (15-9-1-108-jch).