Dual-carbon confined SnO2 as ultralong-life anode for Li-ion batteries
Source abstract
Abstract
Abstract A composite consisting of SnO2 nanoparticles (approximately 5 nm in size) confined in a dual-carbon framework (SnO2@C/rGO, where rGO stands for reduced graphene oxide), was prepared using a facile hydrothermal method. The carbon precursors, sodium alginate and graphene oxide (GO), produced a favourable network for the SnO2 nanoparticles, which were encapsulated in amorphous carbon and well-dispersed over the surface of the rGO nanosheets. The SnO2 @C/rGO electrode exhibited notable cycling performance and rate capability as anode material for Li-ion batteries, and maintained a capacity of 844.1 mA h g−1 for over 1000 cycles at the current of density of 1 A g−1 and 525.4 mA h g−1 for over 1700 cycles at 5 A g−1. Compared with the SnO2@C and SnO2/rGO electrodes, the superior electrochemical properties of the SnO2@C/rGO electrode could be ascribed to the structural stability of the dual-carbon framework as well as the improved electrical conductivity and diffusion coefficient of Li+ ions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies
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References (46)
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