Pre-sodiation strategy for superior sodium storage batteries

Xu, Yong-Kai; Sun, Haozheng; Ma, Cunshuang; Gai, Jingjing; Wan, Yanhua

doi:10.1016/j.cjche.2021.08.020

Cited by 15 publications

(9 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this regard, DFT simulations were used to elucidate the underlying catalytic mechanism of SEI formation by B─Bi. [26,52,53] In Figure 6, the bond dissociation energy of the P─F and C─O linkages was computed by building structural models of NaPF 6 and DME on both B─Bi and Bi. Because of the strong electrical interaction at the interface generated by B-doping, the adsorption energy of NaPF 6 and DME by B─Bi was increased (Figure S20 and Table S4, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Robust Interfacial Chemistry Induced by B‐Doping Enables Rapid, Stable Sodium Storage

Liang,

Song,

Zhang

et al. 2023

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

Constructing a stable solid electrolyte interphase (SEI) at the electrode–electrolyte interface is powerful for optimizing the battery performance. However, studies related to interface chemistry have particularly focused on engineering electrolytes and overlooked regulating electrode materials. Here, this study reports that the B‐doped Bi interconnected nanoparticles (B─Bi) are prepared by a facile and effective chemical reduction reaction. The B doping helps to catalyze the electrolyte decomposition and more NaF formation on the electrode surface, which facilitates a stable uniform SEI with enhanced mechanical stability. Such a robust SEI layer can inhibit the further decomposition of electrolytes and promote the interfacial Na+ transfer. The B─Bi offers a reversible capacity of 403.1 mAh g−1 at 1.0 A g−1 and a high rate capability of 203 mAh g−1 at 80 A g−1. Moreover, the B‐doping method also finds its viability to stabilize SEI in Sb material. This study demonstrates a new strategy for engineering the interface chemistry toward stable SEI and excellent performance.

show abstract

Section: Resultsmentioning

confidence: 99%

Robust Interfacial Chemistry Induced by B‐Doping Enables Rapid, Stable Sodium Storage

Liang,

Song,

Zhang

et al. 2023

Advanced Energy Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…The thicker SEI film exhibits better mechanical strength, conducive to inhibiting dendrite formation. Interestingly, CE will decrease because of the electrolyte consumption caused by SEI formation [71,72] . The thinner SEI cannot withstand the dendrite penetration despite showing high CE with little electrolyte consumption [73] .…”

Section: The Relationship Between Electrolyte-sei-sodium Dendritementioning

confidence: 99%

Interface chemistry for sodium metal anodes/batteries: a review

Li¹,

Lou²,

Peng³

et al. 2022

Chem Synth

Self Cite

View full text Add to dashboard Cite

Sodium metal batteries (SMBs), benefiting from their low cost and high energy densities, have drawn considerable interest as large-scale energy storage devices. However, uncontrollable dendritic formation of sodium metal anodes (SMAs) caused by inhomogeneous deposition of Na+ severely decreases the Coulombic efficiency, leads to short cycling life, and poses potential safety hazards, dragging SMBs out of practical applications. Electrolytes are attracting massive attention for not only providing ion transport channels but also exhibiting vital effects on interfacial compatibility and dendrite growth. In fact, the as-formed solid electrolyte interphase (SEI) has a great influence on the deposition and stripping process of SMAs. Moreover, Na plating process is accompanied by the generation of SEI, in which the electrolyte plays a vital role. Nevertheless, until now, the interaction among electrolyte-SEI-sodium dendrite has rarely been summarized. Herein, a fundamental understanding of sodium dendrite is concluded and the influence of the electrolyte and interface on Na+ deposition is emphasized. Furthermore, the outlook for constructing dendrite-inhibited SMAs is suggested.

show abstract

“…[25][26][27] More importantly, the Na 2 S has been utilized for sodium extraction at an oxidation potential of ≈3.2 V, which facilitates complete decomposition in the voltage window of cathode in SIBs, with high utilization of Na 2 S for sodium replenishment. [28,29] However, commercial anhydrous Na 2 S has large particles and low electronic conductivity, resulting in the inability to extract active sodium ions effectively. [30] Therefore, the development of advanced Na 2 S additives to realize presodiation of SIBs is of immense practical significance.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Initial Coulombic Efficiency of Sodium‐Ion Batteries via Highly Active Na₂S as Presodiation Additive

Zhang

et al. 2023

Small

View full text Add to dashboard Cite

Recently, sodium‐ion batteries (SIBs) have received considerable attention for large‐scale energy storage applications. However, the low initial Coulombic efficiency of traditional SIBs severely impedes their further development. Here, a highly active Na2S‐based composite is employed as a self‐sacrificial additive for sodium compensation in SIBs. The in situ synthesized Na2S is wrapped in a carbon matrix with nanoscale particle size and good electrical conductivity, which helps it to achieve a significantly enhanced electrochemical activity as compare to commercial Na2S. As a highly efficient presodiation additive, the proposed Na2S/C composite can reach an initial charge capacity of 407 mAh g−1. When 10 wt.% Na2S/C additive is dispersed in the Na3V2(PO4)3 cathode, and combined with a hard carbon anode, the full cell achieves 24.3% higher first discharge capacity, which corresponds to a 18.3% increase in the energy density from 117.2 to 138.6 Wh kg−1. Meanwhile, it is found that the Na2S additive does not generate additional gas during the initial charging process, and under an appropriate content, its reaction product has no adverse impact on the cycling stability and rate performance of SIBs. Overall, this work establishes Na2S as a highly effective additive for the construction of advanced high‐energy‐density SIBs.

show abstract

Pre-sodiation strategy for superior sodium storage batteries

Cited by 15 publications

References 35 publications

Robust Interfacial Chemistry Induced by B‐Doping Enables Rapid, Stable Sodium Storage

Robust Interfacial Chemistry Induced by B‐Doping Enables Rapid, Stable Sodium Storage

Interface chemistry for sodium metal anodes/batteries: a review

Enhancing the Initial Coulombic Efficiency of Sodium‐Ion Batteries via Highly Active Na₂S as Presodiation Additive

Contact Info

Product

Resources

About

Pre-sodiation strategy for superior sodium storage batteries

Cited by 15 publications

References 35 publications

Robust Interfacial Chemistry Induced by B‐Doping Enables Rapid, Stable Sodium Storage

Robust Interfacial Chemistry Induced by B‐Doping Enables Rapid, Stable Sodium Storage

Interface chemistry for sodium metal anodes/batteries: a review

Enhancing the Initial Coulombic Efficiency of Sodium‐Ion Batteries via Highly Active Na2S as Presodiation Additive

Contact Info

Product

Resources

About

Enhancing the Initial Coulombic Efficiency of Sodium‐Ion Batteries via Highly Active Na₂S as Presodiation Additive