Electrospun Ni-Added SnO2-Carbon Nanofiber Composite Anode for High-Performance Lithium-Ion Batteries
- Electrospun Ni-Added SnO2-Carbon Nanofiber Composite Anode for High-Performance Lithium-Ion Batteries
- 김동하; 이대희; 김주선; 문주호
- electrospinning; lithium ion battery; carbon nanofiber; SnO2 stabilization; nickel
- Issue Date
- ACS Applied Materials & Interfaces
- VOL 4, NO 10, 5408-5415
- The SnO2 anode is a promising anode for next-generation Li ion batteries because of its high theoretical capacity.
However, it exhibits inherent capacity fading because of the large volume change and pulverization that occur during the charge/
discharge cycles. The buffer matrix, such as electrospun carbon nanofibers (CNFs), can alleviate this problem to some extent, but
SnO2 particles are thermodynamically incompatible with the carbon matrix such that large Sn agglomerates form after
carbonization upon melting of the Sn. Herein, we introduce well-dispersed nanosized SnO2 attached to CNFs for highperformance
anodes developed by Ni presence. The addition of Ni increases the stability of the SnO2 such that the morphologies
of the dispersed SnO2 phase are modified as a function of the Ni composition. The optimal adding composition is determined to
be Ni:Sn = 10:90 wt % in terms of the crystallite size and the distribution uniformity. A high capacity retention of 447.6 mA h g−1
after 100 cycles can be obtained for 10 wt % Ni-added SnO2−CNFs, whereas Ni-free Sn/SnO2−CNFs have a capacity retention
of 304.6 mA h g−1.
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