Regulated Li₂S Deposition toward Rapid Kinetics Li‐S Batteries by a Separator Modified by CeO₂‐Decorated Porous Carbon Nanostructure

Abstract

Figure 7. a) Schematic illustration of in situ Raman analysis device. b) Voltage-time curves at galvanostatic discharge. c) Raman spectroscopy of the CeO 2 /KB/PP corresponding the voltages. d) A photograph image of illuming LED lights by the coin cells. e) Schematics of the catalytic mechanism of CeO 2 /KB nanostructure. f) Comparison of the cycling performance with various modified separator materials for Li-S batteries.

A Fluorinated‐Polyimide‐Based Composite Nanofibrous Separator with Homogenized Pore Size for Wide‐Temperature Lithium Metal Batteries

“…To solve problems mentioned above, all kinds of ways have been applied, consisting of the construction of 3D lithium anode, the optimization of electrolyte, as well as the introduction of functional separators, and artificial solidelectrolyte interface (SEI). [21][22][23][24][25][26] In these methods, the separator takes a significant part in preventing the thermal runaway of LMBs. [27][28][29][30][31][32] On the one hand, the separator can provide fast Lithium (Li) is known for excellent theoretical specific capacity and most negative electrochemical potential, while still restricted by the irregular lithium dendrites and safety risks in practical applications of lithium metal batteries (LMBs) due to thermal runaway.…”

Nitro-functionalized Fe-MOFs for lithium-sulfur batteries

“…As shown in Fig. 5a, taking MIL-101-NO 2 -0.25 as an example, two distinct reduction peaks can be seen located at 2.33 V and 2.03 V, corresponding to the reduction of sulfur monomer to soluble polysul de (Li 2 S n , 4 ≤ n ≤ 8), followed by reduction to Li 2 S [43], respectively The oxidation peak at 2.38 V represents the conversion of Li 2 S to polysul de before being oxidized to S 8 [44].…”

Regulating Polysulfide Transformation and Deposition Kinetics in Lithium–Sulfur Batteries Based on 3D Conductive Framework

“…The current peak shows a good linear relationship with the square of the scan rate, indicating that the process is controlled by diffusion. Further, the diffusion process is described by the Randles–Sevcik equation I p = ( 2.69 × 10 5 ) n 1.5 A D L i + 0.5 C normalL normali υ 0.5 where I P represents the current peak (A), n represents the amount of charge transfer transferred during the reaction, A is the electrode area (cm 2 ), D Li+ is the lithium–ion diffusion rate (cm 2 s –1 ), C Li+ is the concentration of lithium ions in the system (mol cm –3 ), and υ is the scan rate (V s –1 ).…”