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Layered Li-rich cathode materials Li1.2Mn0.534Ni0.133Co0.133O2 (LNCMN-0) and Na doping Li1.1Na0.1Mn0.534Ni0.133Co0.133O2 (LNCMN-0.1) are prepared successfully by a co-precipitation method and several consecutive calcination treatments. Besides, the phase structure, morphology, and electrochemical properties of the four samples are studied in detail using X-ray diffraction (XRD), scanning electron...
Compact-structured silicon/carbon composites consisting of silicon, graphite, and coal tar pitch pyrolysis carbon are prepared via two heating procedures after liquid solidification. The first heating procedure plays a key role in the formation of compact-structured silicon/carbon composites, in which the coal tar pitch has a good fluidity at 180 °C above the softening temperature, and it is easy...
The cycling performance of silicon-carbon anodes in the electrolyte with different content (0, 2, 5, 10 wt%) fluorinated ethylene carbonate (FEC) was studied. Among all the electrolytes the injection of 2 wt% FEC into carbonate electrolyte, the retention capacity of silicon carbon anode enhanced from 54.81 to 83.82% after 50 cycles. The performance of SEI layer on the anode was characterized by SEM,...
Silicon/graphite/carbon (Si/G/CTS-C) composite, based on nano-silicon, flake graphite, and chitosan-derived carbon (CTS-C), was prepared by spray drying and subsequent pyrolysis. The results of X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy illustrate that chitosan is a good dispersion agent and chitosan-derived carbon is N-doped...
Graphene-based materials have exhibited high potential for applications in the field of energy generation and storage because of its high surface area and porosity. Herein, we present a facile strategy to assemble graphene/carbon nanotubes into well-dispersed three-dimensional sponge and subsequently cut nano-scale pores via nickel nanoparticles for enhancing anode’s performance in lithium-ion batteries...
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