Energy Storage Science and Technology ›› 2025, Vol. 14 ›› Issue (1): 30-41.doi: 10.19799/j.cnki.2095-4239.2024.0599

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Effect of interfacial dynamics on low temperature performance of sodium-ion batteries

Yijie YAO1,2(), Junwei ZHANG1,2, Yanjun ZHAO1,2, Hongcheng LIANG1,2, Dongni ZHAO1,2()   

  1. 1.College of Petrochemical Engineering, Lanzhou University of Technology
    2.Gansu Province Key Laboratory of Low Carbon Energy and Chemical Industry, Lanzhou 730050, Gansu, China
  • Received:2024-07-01 Revised:2024-09-05 Online:2025-01-28 Published:2025-02-25
  • Contact: Dongni ZHAO E-mail:582453117@qq.com;zdn129@lut.edu.cn

Abstract:

Sodium-ion batteries (SIBs) are considered a highly promising battery technology in the post-lithium era due to their abundant resources, affordability, high safety, and eco-friendliness. However, their use in cold regions and seasons is significantly limited without appropriate thermal protection. Although several factors contribute to the common capacity loss of SIBs at low temperatures, most are associated with the liquid electrolyte. In low-temperature environments, the fluidity of the electrolyte decreases, leading to poor compatibility between the electrolyte and the electrode. Therefore, the transport capacity of the sodium ion(Na+)in the electrolyte significantly decreases, resulting in a rapid decline in SIB performance and a substantial reduction in cycle life. This study explores the behavior of Na+ in the main electrolyte and at the interface between electrolyte and electrodes, summarizes the strategies to improve the performance of SIBs at low temperatures focusing on electrolyte salts, solvents, and additives, and highlights that the kinetic decline of Na+ through the interface is the primary factor affecting the performance of the battery at low temperatures. In addition, this study introduces new insights on solvation structure and systematically examines the design strategies of low-temperature electrolytes based on the regulation of solvation structure to improve the composition of the electrode/electrolyte interface and reduce the potential barrier of desolvation energy. Furthermore, potential approaches are proposed to improve the low-temperature performance of the battery by enhancing interface dynamics, providing valuable guidance for the effective design of low-temperature SIBs.

Key words: sodium-ion batteries (SIBs), low-temperature, electrode/electrolyte interface, solvation structure, desolvation

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