Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Wang, Hua; Yu, Dandan; Wang, Xiao; Niu, Zhiqiang; Chen, Mengxue; Cheng, Liwei; Zhou, Wei; Guo, Lin

doi:10.1002/ange.201908607

Cited by 35 publications

(38 citation statements)

References 47 publications

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“…98.7 %( Supporting Information, Figure S26d). This corroborates that the 850-Bi@N-CNSs hold an enormous promise towards next-generation PIBs [38][39][40] as an attractive anode.…”

Section: Angewandte Chemiesupporting

confidence: 80%

Unveiling Intrinsic Potassium Storage Behaviors of Hierarchical Nano Bi@N‐Doped Carbon Nanocages Framework via In Situ Characterizations

et al. 2021

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Metallic bismuth has drawn attention as apromising alloying anode for advanced potassium ion batteries (PIBs). However,s erious volume expansion/electrode pulverization and sluggish kinetics always lead to its inferior cycling and rate properties for practical applications.T herefore,a dvanced Bibased anodes via structural/compositional optimization and sur-/interface design are needed. Herein, we develop abottomup avenue to fabricate nanoscale Bi encapsulated in a3 DNdoped carbon nanocages (Bi@N-CNCs) framework with av oid space by using an ovel Bi-based metal-organic framework as the precursor.W ith elaborate regulation in annealing temperatures,t he optimizedB i@N-CNCs electrode exhibits large reversible capacities and long-duration cyclic stability at high rates when evaluated as competitive anodes for PIBs. Insights into the intrinsic K +-storage processes of the Bi@N-CNCs anode are put forward from comprehensive in situ characterizations.

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“…98.7 %( Supporting Information, Figure S26d). This corroborates that the 850-Bi@N-CNSs hold an enormous promise towards next-generation PIBs [38][39][40] as an attractive anode.…”

Section: Angewandte Chemiesupporting

confidence: 80%

Unveiling Intrinsic Potassium Storage Behaviors of Hierarchical Nano Bi@N‐Doped Carbon Nanocages Framework via In Situ Characterizations

et al. 2021

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“…[ 37 ] Furthermore, as shown in the O 1s and C 1s spectra, the signal for the organic ROK and ROCOOK bonds in the concentrated electrolyte, which are derived from the decomposition of the solvent, is significantly lower than in the dilute electrolytes. [ 39 ] These results suggest that the solvent reduction is suppressed in the concentrated electrolyte and that the KFSI decomposition is the main source for the SEI formation.…”

Section: Resultsmentioning

confidence: 98%

Achieving High‐Performance Metal Phosphide Anode for Potassium Ion Batteries via Concentrated Electrolyte Chemistry

Yang

Hao

Long

et al. 2020

Advanced Energy Materials

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Metal phosphides are regarded as promising anode candidates for high‐energy‐density potassium‐ion batteries (PIBs) due to their high theoretical capacity and relatively low operation voltage. The failure mechanism of the metal phosphides originates from the large volume variation during cycling, which leads to fast capacity degradation. Herein, concentrated electrolyte is used to achieve impressive cycling stability for K‐metal and K‐ion batteries over their more dilute counterparts, mainly benefiting from the anion‐derived robust and uniform solid–electrolyte interphase layer, which is helpful in maintaining the electrode integrity, avoiding excessive side reactions, and suppressing electrolyte decomposition. Further investigations also reveal the synergistic advantages of the superior chemical compatibility of concentrated electrolyte to potassium metal, as well as its remarkable electrochemical stability and enhanced safety compared to conventional dilute electrolytes. This work provides a feasible strategy to mitigate the degradation of metal phosphides to build high‐energy‐density PIBs.

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“…Moreover, the large specific surface area could provide sufficient space for K ion reaction at interface. Most importantly, previous reports have suggested that KSFI salt-based electrolyte could form a stable and robust SEI layer on electrode surface, and effectively suppress K dendrite growth and inhibit electrolyte decomposition to boost stable performance for K storage (Xiao et al, 2017 ; Wang H. et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Aerosol-Assisted Assembly of Mesoporous Carbon Spheres With Fast and Stable K-ion Storage

Guo

Wang

et al. 2020

Front. Chem.

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Cost effective anode material with rational design is of significance for rechargeable potassium ion batteries (KIBs). Graphite anode currently still suffers unfavorable rate capability and moderate cycling stability. In this work, we report a mesoporous carbon sphere with rich porous structure as an anode material for KIBs with the assistance of an aerosol spray technology. The as-developed carbon spheres exhibit a well-defined spherical structure with favorable surface area of 1106.32 m 2 g −1 . Furthermore, the effect of different electrolytes on the electrochemical performance of the carbon anode has been investigated systematically. As expected, the carbon material shows excellent potassium storage performance in terms of improved specific capacity of 188.2 mAh g −1 , rate capability and prolonged cyclability with a high capacity of 105.3 mAh g −1 after 500 cycles at a rate of 100 mA g −1 toward potassium storage in KFSI based carbonate electrolyte.

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Electrolyte Chemistry Enables Simultaneous Stabilization of Potassium Metal and Alloying Anode for Potassium‐Ion Batteries

Cited by 35 publications

References 47 publications

Unveiling Intrinsic Potassium Storage Behaviors of Hierarchical Nano Bi@N‐Doped Carbon Nanocages Framework via In Situ Characterizations

Unveiling Intrinsic Potassium Storage Behaviors of Hierarchical Nano Bi@N‐Doped Carbon Nanocages Framework via In Situ Characterizations

Achieving High‐Performance Metal Phosphide Anode for Potassium Ion Batteries via Concentrated Electrolyte Chemistry

Aerosol-Assisted Assembly of Mesoporous Carbon Spheres With Fast and Stable K-ion Storage

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