The Influence of Porous Carbon Nanosheet/Carbon Nanotubes 3D Network on Tin Oxide Lithium Ion Batteries

To relieve the pressure of the volume change of SnO 2 in lithium-ion batteries, a porous carbon nanosheets/carbon nanotubes (PC/CNT) scaffold was used to host SnO 2 as a collector. This novel collector comprised a PC/CNT network. The new PC/CNT composite possessed an excellent loading capacity of SnO 2 , restrained the volume expansion of SnO 2 , and prevented its aggregation. The SnO 2 -PC/CNT electrodes exhibited superb electrochemical performance, with high tin oxide utilization (86.6%), high specific capacity (1761.81 mAh g −1 at 100 mA g −1 ) and outstanding coulomb efficiency. After 100 cycles, the specific discharge capacity maintained greater than 499.07 mAh g −1 , with a coulombic efficiency of 98.93%.