An electrochemically stable hybrid structure material consisting of porous silicon (Si) nanoparticles, carbon nanotubes (CNTs), and reduced graphene oxide (rGO) is developed as an anode material (Si/rGO/CNT) for full cell lithium-ion batteries (LIBs). In the developed hybrid material, the rGO provides a robust matrix with sufficient void space to accommodate the volume change of Si during lithiation/delithiation and a good electric contact. CNTs act as a mechanically stable and electrically conductive support to enhance the overall mechanical strength and conductivity. The developed Si/rGO/CNT composite anode has been first tested in half cell and then in full cell lithium-ion batteries. In half cell, the composite anode shows a high reversible capacity of 1100 mAh g−1 with good capacity retention over 500 cycles when cycled at 1 A g−1. In a full cell lithium-ion battery paired up with LiNi1/3Mn1/3Co1/3O2 (NMC) cathodes, the composite anode shows a specific charge capacity of 161.4 mAh g−1 and a discharge capacity of 152.8 mAh g−1, respectively, with a Coulombic efficiency of 94.7%.
Micro Silicon–Graphene–Carbon Nanotube Anode for Full Cell Lithium-ion Battery
Manuscript received April 1, 2018; final manuscript received July 1, 2018; published online August 6, 2018. Assoc. Editor: Kevin Huang.
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Gao, X., Wang, F., Gollon, S., and Yuan, C. (August 6, 2018). "Micro Silicon–Graphene–Carbon Nanotube Anode for Full Cell Lithium-ion Battery." ASME. J. Electrochem. En. Conv. Stor. February 2019; 16(1): 011009. https://doi.org/10.1115/1.4040826
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