Investigation of the soft carbon microstructure in silicon/carbon anodes for superior lithium storage

Abstract

It is essential to consider the controllable microstructure of soft carbon and its enhancement effect on the electrochemical performance of silicon (Si) active materials.

Soft carbon in non-aqueous rechargeable batteries: a review of its synthesis, carbonization mechanism, characterization, and multifarious applications

“…In a report by Du et al in 2022, the carbonization of coal-based mesophase pitch at 1400 °C ( d 002 = 0.3455 nm, I D / I G = 1.067, BET surface area = 8.45 m 2 g −1 , and average pore volume = 0.038 cm 3 g −1 ) improved the capacity retention of a Si (15 wt%)/C composite anode by ∼54% over 200 cycles at a 200 mA g −1 current density compared to than at 800 °C ( d 002 = 0.3551 nm, I D / I G = 1.156, BET surface area = 31.06 m 2 g −1 , and average pore volume = 0.015 cm 3 g −1 ). 60 Again, the reason was ascribed to the better graphitic degree, crystallinity, structural stability, and pore distribution in the high-temperature carbonized sample, which offered better alloying with Si. The weight percentage of carbon in the composite also influences the electrochemical performances.…”

Research progress in the preparation of mesophase pitch from fluid catalytic cracking slurry

“…Mesophase pitch has become the rst choice for high-quality carbon material precursors for its numeral excellent properties, receiving much attention in the elds of high-tech materials such as refractories, [123][124][125][126][127] energy storage materials, and electrode materials. The post-treatment conditions and structure of mesophase pitch determine the performance and structure of the prepared carbon materials which include carbon bers, needle coke, porous carbon, carbon microbeads, and foam carbon.…”

A Green Solution to Energy Storage: Brewers’ Spent Grains Biocarbon–Silica Composites as High‐Performance Lithium‐Ion Batteries Anodes

“…Soft carbons (SC) have been widely used in LIBs because of their large specific surface areas, high conductivities, and storage capacities. [5][6][7] However, they are synthesized by high-cost processes, needing high-purity raw materials which reduce their commercial applications. In contrast, HC require simpler synthetic processes and cheap environmental friendly raw materials to produce.…”