Three-Dimensional Porous Carbon Skeleton Synthesized by a Template-Free and No-Post-Activation Process Applied for High-Performance Lithium–Sulfur Batteries

Abstract

In recent years, hierarchical porous carbonaceous material has aroused widespread interest as the sulfur carrier-buffer for lithium–sulfur batteries (LSBs), particularly for high-loading and high-energy LSBs. However, the complexity and high cost of fabrication prohibit their extensive promotion and application. In this study, a three-dimensional porous carbon skeleton (3DPCS) has been successfully synthesized from low-cost raw materials by a template-free method without any post-activation process. The 3DPCS/S-60 (60 wt % sulfur content) composite exhibits a high initial capacity of 1623 mA h g–1 (96.9% of theoretical value) at 0.1 C. Benefiting from the abundant hierarchical pores and highly conductive networks, the 3DPCS can be loaded with 90 wt % sulfur, which displays an initial capacity of 889.7 mA h g–1 at 1 C and a slow capacity attenuation ratio of 0.06% per cycle during 1000 charge/discharge tests. Besides, even at an areal sulfur loading of 3 mg cm–2, the 3DPCS/S-80 (80 wt % sulfur content) cathode exhibits an initial capacity of 1256.6 mA h g–1 at 0.1 C and retains 854.7 mA h g–1 after 200 cycles.

Control and regulation of skyrmionic topological charge in a novel synthetic antiferromagnetic nanostructure

“…The cell size is 2 nm × 2 nm × 0.4 nm in the context of simulation. Assuming a Pt/Co system with perpendicular magnetic anisotropy, the magnetic material parameters are as follows: [26][27][28][29] the saturation magnetization (M s ) = 5.8 × 10 5 A m −1 , the exchange stiffness constant (A) = 1.5 × 10 −11 J m −1 , DMI strength (D) = 3 mJ m −2 , P = 0.7, perpendicular magnetic anisotropy (PMA) constant (K up ) = 6 × 10 5 J m −3 and (K low ) = 1 × 10 6 J m −3 . To suppress the SkHE, both the Gilbert damping coefficient α and the coefficient of the non-adiabatic β are assumed to be 0.4.…”

“…Theoretically, the motion of a rigid magnetic texture driven by CIP can be analyzed using Thiele equations: 26,32,33…”

The Microparticles SiOx Loaded on PAN-C Nanofiber as Three-Dimensional Anode Material for High-Performance Lithium-Ion Batteries

“…And the pore system of aerogel is unaltered, and fiber bundles do not significantly aggregate into clumps. The rich pore structure can significantly increase electrolyte penetration and speed up lithium ion diffusion [60].…”

Modulation of electromagnetic wave absorption via porosity in Pechini-derived carbon guided by a random network model

“…Conventionally, calcination removes the organic content and produces metal oxides, but carbon can also be obtained by pyrolyzing the Pechini gel under an inert atmosphere. 26–28…”