Research Progress on the Pitch-Based Anode Materials for Sodium-Ion Batteries

This paper conducts a comprehensive review of the modification approaches for sodium-ion anode materials fabricated using pitch-based carbon. The current status of pitch-based carbon preparation of anode materials for sodium-ion batteries (SIBs) by heteroatom doping, morphology construction, and composite materials is introduced. The effects of different modification methods of pitch-based carbon on their sodium storage performance were analyzed and compared. A variety of pitch-based carbon modification mechanisms are also elucidated. From a microscopic perspective, the characteristics of pitch-based carbon applied to the anode of SIBs are expounded, which has a certain guiding significance for the rational design of the microstructure of pitch-based sodium-ion battery anode materials. The commercial application of pitch-based sodium-ion battery anode materials relies on a simple and effective modification process. As a high-quality C-rich precursor, pitch has great potential in the application of SIBs. Pitch can be used to prepare anode materials of SIBs by means of heteroatom doping, form construction and composite material, etc. The common point of different modification methods is to adjust the stacking structure of microcrystalline materials. image