Inexpensive methodology for obtaining flexible SnO2-single-walled carbon nanotube composites for lithium-ion battery anodes

Abstract: A versatile and low-cost methodology for fabricating free-standing carbon graphite (CG)/SnO2/single-walled carbon nanotube (SWCNT) composites as anode material for lithium-ion batteries is described. CG-SnO2 (1:1) was ball milled and the composite obtained was dispersed with different ratios (wt%) of SWCNT. Then, the flexible composite CG-SnO2-SWCNT was successfully manufactured by a simple vacuum filtration procedure. Electrochemical measurements demonstrated that the anode composite paper with 50wt% CG-SnO2 and 50wt% SWCNT showed excellent retention of a high specific capacity (318mAhg(-1)) after 30cycles at current density of 0.08mAcm(-2), which was twice that of SWCNT paper (155mAhg(-1)). This SWCNT-CG-SnO2 combination is very promising, since the SWCNT could act as a flexible mechanical support, while CG-SnO2 provides high capacity. This paper presents an inexpensive methodology that may be applied to the design of electrodes and evaluates the interaction between SnO2 and carbon materials as anode in lithium-ion battery systems.

Author(s): Bento, FR; Corradini, PG; Mascaro, LH

JOURNAL OF SOLID STATE ELECTROCHEMISTRY

DOI: 10.1007/s10008-019-04283-9