Research Progress on Hard Carbon Closed Pore Structure of Sodium Ion Batteries

doi:10.19799/j.cnki.2095-4239.2024.0896

Abstract

Abstract:

Sodium ion batteries (SIBs) have the advantages such as low cost as well as abundant resources, and are considered the best supplement or even replacement for LIBs in the field of large-scale energy storage. Hard carbon is currently the most usefull anode material for SIBs, and its closed cell structure is beneficial for improving the capacity of the low voltage plateau region. However, the mechanism of the formation of the low potential plateau region in hard carbon is still controversial, and the relationship between the closed pore structure of hard carbon and electrochemical performance is not yet clear, which seriously restricts the industrialization process of sodium ion batteries. This article reviews the research progress on the closed cell structure of hard carbon in sodium ion batteries in recent years. Firstly, the basic definition and sodium storage mechanism of closed cell structure in hard carbon materials are summarized. Subsequently, different methods for regulating the closed pore structure of carbon materials, closed pore structure analysis and characterization techniques, as well as the correlation between closed pore structure and sodium storage electrochemical performance were emphasized. Finally, the problems and challenges in the electrochemical performance of closed cell structures in hard carbon materials for sodium ion batteries were analyzed, and the main development directions for the future were proposed.

Key words: sodium-ion batteries, hard carbon, closed pore structure, platform area capacity

CLC Number:

TM 912

Yangfeng WANG, Jiaao HOU, Zichen ZHU, Cong SUO, Shuandi HOU. Research Progress on Hard Carbon Closed Pore Structure of Sodium Ion Batteries[J]. Energy Storage Science and Technology, doi: 10.19799/j.cnki.2095-4239.2024.0896.

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