Cation/Anion-Dual regulation in Na3MnTi(PO4)3 cathode achieves the enhanced electrochemical properties of Sodium-Ion batteries

Shu-Ying Li; Qi-Min Yin; Zhen-Yi Gu; Yan Liu; Yan-Ning Liu; Meng-Yuan Su; Xing-Long Wu

doi:10.1016/j.jcis.2024.03.048

Cation/Anion-Dual regulation in Na₃MnTi(PO₄)₃ cathode achieves the enhanced electrochemical properties of Sodium-Ion batteries

J Colloid Interface Sci. 2024 Jun 15:664:381-388. doi: 10.1016/j.jcis.2024.03.048. Epub 2024 Mar 8.

Authors

Shu-Ying Li¹, Qi-Min Yin¹, Zhen-Yi Gu², Yan Liu¹, Yan-Ning Liu¹, Meng-Yuan Su¹, Xing-Long Wu³

Affiliations

¹ Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, PR China.
² Key Laboratory for UV Light-Emitting Materials and Technology, Department of Physics, Northeast Normal University, Changchun, Jilin 130024, PR China. Electronic address: guzy166@nenu.edu.cn.
³ Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, PR China; Key Laboratory for UV Light-Emitting Materials and Technology, Department of Physics, Northeast Normal University, Changchun, Jilin 130024, PR China. Electronic address: xinglong@nenu.edu.cn.

PMID: 38479274
DOI: 10.1016/j.jcis.2024.03.048

Abstract

Na₃MnTi(PO₄)₃ (NMTP) emerges as a promising cathode material with high-performance for sodium-ion batteries (SIBs). Nevertheless, its development has been limited by several challenges, including poor electronic conductivity, the Mn³⁺ Jahn-Teller effect, and the presence of a Na⁺/Mn²⁺ cation mixture. To address these issues, we have developed a cation/anion-dual regulation strategy to activate the redox reactions involving manganese, thereby significantly enhancing the performance of NMTP. This strategy simultaneously enhances the structural dynamics and facilitates rapid ion transport at high rates by inducing the formation of sodium vacancy. The combined effects of these modifications lead to a substantial improvement in specific capacity (79.1 mAh/g), outstanding high-rate capabilities (35.9 mAh/g at 10C), and an ultralong cycle life (only 0.040 % capacity attenuation per cycle over 250 cycles at 1C for Na_3.34Mn_1.2Ti_0.8(PO_3.98F_0.02)₃) when used as a cathode material in SIBs. Furthermore, its performance in full cell demonstrates impressive rate capability (44.4 mAh/g at 5C) and exceptional cycling stability (with only 0.116 % capacity decay per cycle after 150 cycles at 1C), suggesting its potential for practical applications. This work presents a dual regulation strategy targeting different sites, offering a significant advancement in the development of NASICON phosphate cathodes for SIBs.

Keywords: Dual regulation; NASICON; Na(3)MnTi(PO(4))(3); Phosphate cathode; Sodium-ion batteries.