Chemical disorder engineering enables high-voltage stable oxide cathodes over –20–25 ℃ in sodium-ion batteries

Tianyi Song, Chenchen Wang, Pinit Kidkhunthod, Xiaolong Zhou, Anquan Zhu, Yuanqi Lan, Kunlun Liu, Jianli Liang, Wenjun Zhang, Wenjiao Yao*, Yongbing Tang*, Chun-Sing Lee*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

1 Citation (Scopus)

Abstract

O3-type Mn-Fe-Ni layer oxide cathodes show great commercialization potential due to their high capacities and simple synthesis. Nevertheless, simultaneously achieving high energy density and good cycling stability remains challenging. Herein, we introduce a chemical disordering strategy to create O3-Na0.83Mn0.35Fe0.15Ni0.15Cu0.10Co0.20Sn0.05O2 (MFNCCS) cathode. The chemical disordering strategy was implemented through selective multi-transition metal substitution and quenching during synthesis. The former promotes a high entropy effect, while the latter is beneficial to increasing the quenching disorder degree, functioning a synergy effect in suppressing irreversible multi-phase transitions and promoting cycling stability. As a result, the MFNCCS cathode can retain 91.6 % (∼103.3 mAh g1) of its capacity after 500 cycles at 200 mA g1, with an energy density of 285.3 Wh kg⁻1 at the 500th cycle, which is superior to previously reported state-of-the-art layered oxide cathodes in the voltage range of 2.0–4.3 V. Besides, it achieves stable cycling within 2.0–4.3 V over temperature range of –20 to 25 °C. This work offers new insights for high-voltage stable layered cathodes in wide-temperature SIBs. © 2025 Elsevier B.V.
Original languageEnglish
Article number104106
JournalEnergy Storage Materials
Volume76
Online published21 Feb 2025
DOIs
Publication statusPublished - Mar 2025

Funding

This work was supported by the Research Grant Council [RGC Reference: N_CityU104/20]; Shenzhen Science and Technology Innovation Program [Grant No. SGDX20230116092055008]; National Natural Science Foundation of China [Grant No. 52372250, 52061160484, 52125105]; National Research Council of Thailand [NRCT, grant No. N42A650253]; the NSRF via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation [Grant No. B50G670108]; Shenzhen Science and Technology Planning Project [Grant No. KJZD20230923113859006, RCYX20221008092850072]; Guangdong Basic and Applied Basic Research Foundation [Grant No. 2024A1515030076, 2024A1515011670].

Research Keywords

  • Chemical disordering
  • High-voltage stability
  • Sodium-ion batteries
  • Transition metal oxide cathode
  • −20–25 °C

Fingerprint

Dive into the research topics of 'Chemical disorder engineering enables high-voltage stable oxide cathodes over –20–25 ℃ in sodium-ion batteries'. Together they form a unique fingerprint.

Cite this