Corn Stalks ‐Derived Carbon‐SnO2 Composite as Anodes for Lithium‐Ion Batteries.

SnO2 is known as a promising anode candidate for lithium‐ion batteries (LIBs), but suffers from the low electrical conductivity and severe volume variation during cycling, which restraint its practical applications. To solve these issues, we successfully fabricated the three‐dimensional structure of carbon obtained from corn stalks and SnO2 composites. The materials exhibit excellent electrochemical performance. After 100 cycles, it shows a reversible capacity of 691 mA h g−1 at a current density of 0.2 C. Excellent cycle performance is due to the unique structure, which has a strong internal chemical bond between the SnO2 nanoparticles (SnO2 NPs) and the carbon skeleton, preventing SnO2 NPs from falling off the 3D network during the cycle. This work may provide a broader vision into synthesising C‐SnO2 composites for high‐performance anode materials of LIBs. In this paper, we successfully fabricated the three‐dimensional structure of carbon obtained from corn stalks and SnO2 composites by a simple one‐step hydrothermal method. The materials exhibit excellent electrochemical performance. After 100 cycles, it shows a reversible capacity of 691 mA h g−1 at a current density of 0.2 C. Its electrochemical performance is much higher than the SnO2 used in the market. [ABSTRACT FROM AUTHOR]