Ultrasmall CoS nanoparticles embedded in heteroatom-doped carbon for sodium-ion batteries and mechanism explorations via synchrotron X-ray techniques

V3S4/PPy nanocomposites with superior high-rate capability as sodium-ion battery anodes

“…Up to the present, a variety of compounds have been extensively studied for SIB anode materials, including carbon-based materials, alloys, and metal oxides, suldes, and phosphides, [18][19][20][21][22][23][24] which can be classied into three main types: insertion-type (e.g. hard carbon, TiO 2 , etc.…”

Dispersed MnO2 nanoparticles/sugarcane bagasse-derived carbon composite as an anode material for lithium-ion batteries

“…Furthermore, the lithium-ion storage mechanisms of BGC, NBGC, and the MnO 2 /NBGC composites with different doping content were investigated by using cyclic voltammetry to observe their electrochemical behavior at varied scanning rates. The relationship between the current and the scanning rate is depicted by the following eqn (5), 38–41 and the charge storage process is also described by eqn (5). i = aν b where the measured current i follows the power law relationship with the scan rate ν . Both a and b are fitting parameters obtained from the intercept and slope of the plot log( i ) vs. log( ν ), respectively.…”

Construction of hierarchical multilayered nanomaterials derived from Co-MOFs supported by pyromellitic acid for advanced lithium storage performance

“…2d); the binding energy at 398.1 eV can be attributed to pyridinic-type nitrogen within the carbon matrix. 46 Nitrogen doping has two main functions in terms of changing the surface electronic properties: increasing the defect sites of carbon materials and further boosting the catalytic activity, as well as facilitating the dispersion of the metal active component on the surface of the carbon materials, thereby enhancing the electrochemical properties of the composites. 47 The microstructure and morphology of the Co-MOF precursors were characterized by SEM.…”