Constructing FePSe<sub>3</sub>–FeSe<sub>2</sub> heterojunctions uniformly in a Ketjen black carbon matrix for superior potassium ion batteries

Chen, Bicui; Lu, Xian; Zhong, Houyang; Huang, P. C.; Wu, Yue; Xu, Shidang; Du, Ke‐Zhao; Wu, Xiaohui

doi:10.1039/d2ta07426e

Cited by 9 publications

(3 citation statements)

References 73 publications

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“…The peak at 0.55 V corresponds to the conversion reaction of K x FeSe to Fe and K y Se. [44] For the anodic scan, multiple oxidation peaks at the range of 1.5-2.5 V are observed, which are related to the process of depotassiation. [45] Notably, the reduction peaks of FeSe to Fe and K y Se shifted to higher positions at 1.6 and 0.67 V in the 2nd cycle.…”

Section: Resultsmentioning

confidence: 94%

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Reduced Graphene Oxide Modulated FeSe/C Anode Materials for High‐Stable and Long‐Life Potassium‐Ion Batteries

Zhang,

Liu,

Xiao

et al. 2023

Chemistry A European J

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Reduced graphene oxide (rGO) has been demonstrated to effectively enhance the potassium storage performance of transition metal selenides due to its robust mechanical properties and high conductivity. However, the impact of rGO on the electrode‐electrolyte interface, a crucial factor in the electrochemical performance of potassium‐ion batteries (PIBs), requires further exploration. In this study, we synthesized a seamless architecture of rGO on FeSe/C nanocrystals (FeSe/C@rGO). Comparative analysis between FeSe/C and FeSe/C@rGO reveals that the rGO layer exhibits robust adsorption energies towards EC and DEC, inducing the formation of organic‐rich solid‐electrolyte interphase (SEI) without damage to the structural integrity. Furthermore, incorporating rGO triggers K+‐ions into the double electrode layer (EDL), markedly improving the transport of K+‐ions. As a PIB anode, FeSe/C@rGO exhibits a reversible capacity of 332 mAh g‐1 at 200 mA g‐1 after 300 cycles, along with excellent long‐term cycling stability, showcasing an ultralow decay rate of only 0.086% per cycle after 1900 cycles at 1000 mA g‐1.

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Section: Resultsmentioning

confidence: 94%

“…The authors have cited additional references within the Supporting Information. [55][56][57][58][59][60]…”

Section: Discussionmentioning

confidence: 99%

Reduced Graphene Oxide Modulated FeSe/C Anode Materials for High‐Stable and Long‐Life Potassium‐Ion Batteries

Zhang,

Liu,

Xiao

et al. 2023

Chemistry A European J

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“…68,69 Further, NSP-CF@NCW portrays the Raman signals around 165, 210, and 145 cm −1 ascribed to the vibrational modes of A 1g and E g , respectively, which confirms the successful incorporation of P-atoms. 70…”

Section: Resultsmentioning

confidence: 99%

Microstructural and electron framework-engineered 3D NiSeP-integrated CuFe composites as trifunctional electrocatalysts for sensing and urea-assisted water-splitting applications

Farithkhan,

Gowthaman,

Kumar

et al. 2024

J. Mater. Chem. A

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Vacancy‐Rich Ternary Iron Phosphoselenide Multicavity Nanorods: A Highly Reversible and Fast Anode for Sodium‐Ion Batteries

Tian,

Sun,

et al. 2024

Adv Funct Materials

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The significance of exploring optimal electrode materials cannot be overstated, particularly in mitigating the critical issues posed by sluggish redox kinetics, significant volume variations, and severe structural collapse resulting from the insertion and extraction of sodium ions. These efforts are crucial for enhancing the longevity and rapid charging capabilities of sodium‐ion batteries (SIBs). Herein, a defect engineering strategy for the in situ encapsulation of single‐phase ternary iron phosphoselenide into porous carbon by robust chemical bonds with the formation of rod‐like multicavity nanohybrids (FePSe3@C) is presented. The incorporation of Se atom not only modulates the electronic structure of the central metal Fe atom and enhances the intrinsic electrical conductivity, but also generates numerous additional reaction sites and accelerates the reaction kinetics of FePSe3@C, as corroborated by theoretical calculations and kinetic analysis. Notably, the FePSe3@C demonstrates an outstanding rate capability of 321.7 mAh g−1 even at 20 A g−1 and long cycling stability over 1000 cycles. The sodium‐ion full cell, pairing the FePSe3@C anode with the Na3V2(PO4)3@C cathode, exhibits a remarkable energy density of 202 Wh kg−1, demonstrating its practical applicability. This work provides a controllable defect and morphology engineering strategy to construct advanced materials with fast charge transfer for high‐power/energy SIBs.

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Constructing FePSe₃–FeSe₂ heterojunctions uniformly in a Ketjen black carbon matrix for superior potassium ion batteries

Abstract: Layered heterostructures have gained significant attention as potential platforms for energy storage because of their unique electronic and interfacial characteristics. Engineering heterojunctions in a rational, efficient, and effective manner is...

Cited by 9 publications

References 73 publications

Reduced Graphene Oxide Modulated FeSe/C Anode Materials for High‐Stable and Long‐Life Potassium‐Ion Batteries

Reduced Graphene Oxide Modulated FeSe/C Anode Materials for High‐Stable and Long‐Life Potassium‐Ion Batteries

Microstructural and electron framework-engineered 3D NiSeP-integrated CuFe composites as trifunctional electrocatalysts for sensing and urea-assisted water-splitting applications

Vacancy‐Rich Ternary Iron Phosphoselenide Multicavity Nanorods: A Highly Reversible and Fast Anode for Sodium‐Ion Batteries

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Constructing FePSe3–FeSe2 heterojunctions uniformly in a Ketjen black carbon matrix for superior potassium ion batteries

Abstract: Layered heterostructures have gained significant attention as potential platforms for energy storage because of their unique electronic and interfacial characteristics. Engineering heterojunctions in a rational, efficient, and effective manner is...

Cited by 9 publications

References 73 publications

Reduced Graphene Oxide Modulated FeSe/C Anode Materials for High‐Stable and Long‐Life Potassium‐Ion Batteries

Reduced Graphene Oxide Modulated FeSe/C Anode Materials for High‐Stable and Long‐Life Potassium‐Ion Batteries

Microstructural and electron framework-engineered 3D NiSeP-integrated CuFe composites as trifunctional electrocatalysts for sensing and urea-assisted water-splitting applications

Vacancy‐Rich Ternary Iron Phosphoselenide Multicavity Nanorods: A Highly Reversible and Fast Anode for Sodium‐Ion Batteries

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Constructing FePSe₃–FeSe₂ heterojunctions uniformly in a Ketjen black carbon matrix for superior potassium ion batteries