Synergistic effect of high concentration sodium bis(fluorosulfonyl)imide electrolyte and fluorinated ethylene carbonate enabling stability and high-rate performance of Na metal batteries

Nguyen, Trung Thien; Chau, Penny Chin Yiu (周展耀); Nguyen, Nhung; Pham, Liem Thanh; Nguyen, Phan Hong; Huynh, Tuyen Thi Kim; Nguyen, Du Huy; Tran, Quan Hung; Le, My Loan Phung; Trần, Mẫn Văn

doi:10.1016/j.cplett.2023.140576

Chemical Physics Letters

2023

DOI: 10.1016/j.cplett.2023.140576

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Synergistic effect of high concentration sodium bis(fluorosulfonyl)imide electrolyte and fluorinated ethylene carbonate enabling stability and high-rate performance of Na metal batteries

Trung Thien Nguyen

Penny Chin Yiu (周展耀) Chau

Nhung Nguyen

et al.

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Cited by 4 publications

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Organic Electrolytes for Stable and Safe Potassium‐Ion Batteries

Xu,

Yi,

Fan

et al. 2024

Batteries & Supercaps

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Though lithium‐ion batteries (LIBs) are prevalent, the scarcity and uneven distribution of lithium resources have driven the search for complementary battery technologies. Potassium‐ion batteries (PIBs) have emerged as a promising contender in this quest due to their low‐cost, abundant resources, and potentially high voltage. The frequency of battery‐related accidents in recent years has heightened concerns about battery safety. The electrolyte, as a critical component of batteries, plays a pivotal role in determining safety, as it is directly linked to the formation of the solid electrolyte interphase (SEI), which is crucial for battery stability and security. Initially, enhancing battery safety often came at the cost of performance. However, thanks to the relentless efforts and in‐depth research, it is now possible to improve performance without compromising safety. This article provides an overview of organic electrolyte systems and introduces some state‐of‐the‐art electrolyte formulations, aiming to offer guidance on enhancing the safety and stability of PIBs.

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Organic Electrolytes for Stable and Safe Potassium‐Ion Batteries

Xu,

Yi,

Fan

et al. 2024

Batteries & Supercaps

View full text Add to dashboard Cite

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Recent progress on the materials design towards thermally safe sodium-ion batteries

Luo,

Zhang,

Guo

et al. 2025

Journal of Energy Chemistry

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Achieving the Inhibition of Aluminum Corrosion by Dual-Salt Electrolytes for Sodium-Ion Batteries

Huang,

Qiu,

Yang

et al. 2024

ACS Appl. Mater. Interfaces

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Sodium bis(fluorosulfonyl)imide (NaFSI) electrolytes are renowned for their superior physicochemical and electrochemical properties, making them ideal for high-performance sodium-ion batteries (SIBs). However, severe oxidative dissolution of aluminum current collectors (commonly known as Al corrosion) in NaFSI-based electrolytes occurs at high potentials.To address this challenge, aiming to understand the Al corrosion mechanism and develop strategies to inhibit corrosion, we propose dual-salt electrolytes using 0.8 mol L −1 (M) NaFSI and 0.2 M of a second fluorine-containing sodium salt dissolved in EC/PC solutions (1:1, v/v) to construct an insoluble deposits layer on the Al. Dual-salt electrolytes adopting a second sodium salt capable of passivating the Al collector have been extensively investigated through various techniques, such as cyclic voltammetry, scanning electron microscopy, chronoamperometry, X-ray photoelectron spectroscopy, and charge−discharge tests. Our findings demonstrate that introducing sodium difluoro(oxalato)borate (NaDFOB) into the NaFSI electrolytes inhibits Al corrosion, which is attributed to the formation of insoluble deposits of Al−F (AlF 3 ) and B−F containing polymers. Moreover, the capacity retention of Na|| Na 3 V 2 (PO 4 ) 3 (NVP) cells using the NaFSI-NaDFOB dual-salt electrolyte reaches 99.2% along with a Coulombic efficiency over 99.3% at a 1 C rate after 200 cycles. This research provides a practical solution for passivating Al collectors in SIBs with NaFSI electrolytes and promotes the development of sodium batteries with long calendar lifetimes.

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Synergistic effect of high concentration sodium bis(fluorosulfonyl)imide electrolyte and fluorinated ethylene carbonate enabling stability and high-rate performance of Na metal batteries

Cited by 4 publications

References 39 publications

Organic Electrolytes for Stable and Safe Potassium‐Ion Batteries

Organic Electrolytes for Stable and Safe Potassium‐Ion Batteries

Recent progress on the materials design towards thermally safe sodium-ion batteries

Achieving the Inhibition of Aluminum Corrosion by Dual-Salt Electrolytes for Sodium-Ion Batteries

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