A hybrid composite of H₂V₃O₈ and graphene for aqueous lithium-ion batteries with enhanced electrochemical performance

Abstract

Aqueous rechargeable lithium-ion batteries (ARLBs) are regarded as a competitive challenger for large-scale energy storage systems because of their high safety, modest cost, and green nature.

S@C composites constructed by a graded pore-making strategy for Mg–S batteries with outstanding rate performance

“…where a and b are constants. Usually, the value of b is 0.5 in a diffusion-controlled faradaic process and 1.0 in a surfacedominant process without diffusion control, 41 where the peak current increases linearly with an increase in the scan rate.…”

“…The extent of the pseudo capacitive effect can be qualitatively analyzed based on the relationship between the current ( i ) and scan rate ( v ) measured from the CV curves, using eqn (1) and (2): i = av b log i = log a + b × log v where a and b are constants. Usually, the value of b is 0.5 in a diffusion-controlled faradaic process and 1.0 in a surface-dominant process without diffusion control, 41 where the peak current increases linearly with an increase in the scan rate. According to the slopes of log i and log v plots for different redox states (Fig.…”