Modulation of MoS₂ interlayer dynamics by in situ N-doped carbon intercalation for high-rate sodium-ion half/full batteries

Abstract

In comparison to lithium-ion batteries, sodium-ion batteries (SIBs) have been proposed as an alternative for large-scale energy storage. However, finding an anode material that can overcome the sluggish electrochemical reaction...

3D hierarchical networks constructed from interlayer-expanded MoS2 nanotubes and rGO as high-rate and ultra-stable anodes for lithium/sodium-ion batteries

“…2h). 59 With regard to the N 1s deconvolution spectra (Fig. 2i), the peaks at 395.6, 398.3, 400.1 and 401.7 eV are identified as Mo 3p 3/2 , pyridinic N, pyrrolic N and graphitic N, respectively.…”

“…As the scan rate increases, the shapes of the CV curves not only remain similar but the peak current gradually increases, demonstrating the outstanding rate capability of the composite. 73,74 The Li-ion storage behavior can be inferred from the formula i = av b , in which i is the measured current at the specific scan rate (v), a is a constant, and b calculated from the slopes of log(i) vs. log(v) is directly related to the charge storage mechanism. 30,75 In general, the b value close to 0.5 or 1 indicates that diffusion-controlled processes or pseudocapacitive behavior play a major role in the electrochemical process, respectively.…”

CoSe2 nanoparticles anchored on dual 1D carbon nanotubes/N-doped carbon nanofibers as high-performance anodes for sodium-ion storage

“…The redox peaks shifted slightly as the scan rate increased, indicating the low electrode polarization. 56 According to previous studies, the relationship between peak current and scan rate is shown in the following equations: 57,58 i = av b log( i ) = b log( v ) + log( a )where i is the redox peak current, v is the scan rate, a and b are adjustable parameters, and the value of b can be determined from the slope of log( i ) to log( v ). When b is 0.5, the electrochemical process is mainly controlled by diffusion; when b is 1.0, it is dominated by pseudocapacitance.…”

“…The redox peaks shifted slightly as the scan rate increased, indicating the low electrode polarization. 56 According to previous studies, the relationship between peak current and scan rate is shown in the following equations: 57,58 i…”