Understanding SEI evolution during the cycling test of anode-free lithium-metal batteries with LiDFOB salt

Hawari, Naufal Hanif; Xie, Huiqing; Prayogi, Achmad; Sumboja, Afriyanti; Ding, Ning

doi:10.1039/d3ra03184e

“…17 The effectiveness of LiDFOB has been repeatedly linked to its impact on SEI composition and the morphology of the deposited lithium. 14,19–22 In a study by Weber et al , a high-performance dual-salt electrolyte blend of LiDFOB with lithium tetrafluoroborate (LiBF 4 ) in a FEC/DEC solvent mixture exhibited a capacity retention of 80% over 90 cycles for AFLMBs with LiNi 0.5 Mn 0.3 Co 0.2 O 2 cathodes, shown in Fig. 3a.…”

Section: Electrolyte Design To Extend Cycling Life Of Aflmbsmentioning

confidence: 99%

Anode-free lithium metal batteries: a promising flexible energy storage system

Tang,

Tian,

Zhang

et al. 2024

J. Mater. Chem. A

1

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Preformation of Insoluble Solid‐Electrolyte Interphase for Highly Reversible Na‐Ion Batteries

Fei,

Qi,

Han

et al. 2024

Angewandte Chemie

1

0

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Stable solid‐electrolyte interphase (SEI) is crucial for cycling reversibility of Na‐ion batteries by mitigating continuous side reactions. So far, the severe SEI dissolution leads to low Coulombic efficiency (CE) and short cycle life. Meanwhile, the quantified relationship between SEI components and their solubility remains unclear. In this work, we establish the direct correlation between SEI components and SEI solubility, and quantify that the solubility of organic‐rich SEI is 3.26 times of inorganic‐rich SEI. We further propose a feasible strategy to preform inorganic‐rich insoluble SEI and demonstrate a practical hard carbon (HC)||NaMn0.33Fe0.33Ni0.33O2 full cell in commercial electrolyte of 1 M NaPF6 in propylene carbonate (PC) with 80.0% capacity retention for 900 cycles, and achieve a record‐high average CE of 99.95% for a practical Na‐ion full cell. This study provides an effective strategy of preforming insoluble SEI to suppress its dissolution towards highly reversible Na‐ion batteries.

show abstract

Preformation of Insoluble Solid‐Electrolyte Interphase for Highly Reversible Na‐Ion Batteries

Fei,

Qi,

Han

et al. 2024

Angew Chem Int Ed

0

View full text Add to dashboard Cite

Stable solid‐electrolyte interphase (SEI) is crucial for cycling reversibility of Na‐ion batteries by mitigating continuous side reactions. So far, the severe SEI dissolution leads to low Coulombic efficiency (CE) and short cycle life. Meanwhile, the quantified relationship between SEI components and their solubility remains unclear. In this work, we establish the direct correlation between SEI components and SEI solubility, and quantify that the solubility of organic‐rich SEI is 3.26 times of inorganic‐rich SEI. We further propose a feasible strategy to preform inorganic‐rich insoluble SEI and demonstrate a practical hard carbon (HC)||NaMn0.33Fe0.33Ni0.33O2 full cell in commercial electrolyte of 1 M NaPF6 in propylene carbonate (PC) with 80.0% capacity retention for 900 cycles, and achieve a record‐high average CE of 99.95% for a practical Na‐ion full cell. This study provides an effective strategy of preforming insoluble SEI to suppress its dissolution towards highly reversible Na‐ion batteries.

show abstract

Understanding SEI evolution during the cycling test of anode-free lithium-metal batteries with LiDFOB salt

Abstract: The solid electrolyte interphase (SEI) on Li deposits determines the performance of anode-free lithium metal batteries. LiDFOB salt in a full-cell configuration promotes inorganic-rich SEI and dense Li plating, positively affecting Li reversibility.

Cited by 6 publications

References 53 publications

Anode-free lithium metal batteries: a promising flexible energy storage system

Anode-free lithium metal batteries: a promising flexible energy storage system

Preformation of Insoluble Solid‐Electrolyte Interphase for Highly Reversible Na‐Ion Batteries

Preformation of Insoluble Solid‐Electrolyte Interphase for Highly Reversible Na‐Ion Batteries

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