
Dr. M. R. Jayapal
Department of Chemistry CMR Technical Campus, Hyderbad, India
Title: Highly dispersed ultra-small nano Sn-SnSb nanoparticles anchored on N doped graphene sheets as high performance anode for sodium ion batteries
Abstract:
High theoretical capacity
and low discharge platforms of Sn and Sb-based materials are an auspicious
anode material for sodium ion batteries. Although, their large volume change
before and after sodium insertion during cycling leads to unstable electrode
structure and poor cycle performance. In view of the above, a thermo che[1]mical strategy by a simple
one-pot for producing 3–6 nm diameter homogeneously dispersed Sn/SnSb nano[1]particles on a
nitrogen-doped graphene sheet with a large-scale and low-cost feature for high
performance sodium ion battery is reported. Highly dispersed nano Sn-SnSb
alloy/graphene composite electrode not only had good stress adaptability and
good integrity protection to prevent agglomeration and polarization during
cycling, and also provided the rapid Na+ diffusion and electronic transfer
channels, thus showing high rate and ultra stable cycle performance. The as-prepared electrode could maintain the super stable reversible capacities of 251.8, 146.2 and 60.2 mAh g−1 at 1, 4 and 10 A g−1 over 1000 cycles, respectively.
Biography: