Boosting Potassium-Ion Battery Performance by Encapsulating Red Phosphorus in Free-Standing Nitrogen-Doped Porous Hollow Carbon Nanofibers

Wu, Ying; Hu, Shuhe; Xu, Rui; Wang, Jiawei; Peng, Zhangquan; Zhang, Qiaobao; Yu, Yan

doi:10.1021/acs.nanolett.8b04957

Cited by 254 publications

(192 citation statements)

References 40 publications

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“…[1] Generally,a lloying anodes such as tin (Sn), phosphorus (P), antimony (Sb), bismuth (Bi), and Sn 4 P 3 that work via the alloying-dealloying mechanism are regarded as appealing electrode materials for high-performance KIBs ( Figure 1A). [2][3][4][5][6][7][8][9][10] However, KIBs based on alloying anodes deliver unsatisfactory fast capacity decay during cycling. On the one hand, large volume change of alloying anodes during potassiation and depotassiation leads to solid-electrolyte interphase (SEI) rupture and material pulverization.…”

mentioning

confidence: 99%

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

Wang

et al. 2019

Angewandte Chemie

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Alloying anodes are promising high‐capacity electrode materials for K‐ion batteries (KIBs). However, KIBs based on alloying anodes suffer from rapid capacity decay due to the instability of K metal and large volume expansion of alloying anodes. Herein, the effects of salts and solvents on the cycling stability of KIBs based on a typical alloying anode such as amorphous red phosphorus (RP) are investigated, and the potassium bis(fluorosulfonyl)imide (KFSI) salt‐based carbonate electrolyte is versatile to achieve simultaneous stabilization of K metal and RP electrodes for highly stable KIBs. This salt‐solvent complex with a moderate solvation energy can alleviate side reactions between K metal and the electrolyte and facilitate K+ ion diffusion/desolvation. Moreover, robust SEI layers that form on K metal and RP electrodes can suppress K dendrite growth and resist RP volume change. This strategy of electrolyte regulation can be applicable to other alloying anodes for high‐performance KIBs.

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mentioning

confidence: 99%

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

Wang

et al. 2019

Angewandte Chemie

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“…Therefore, they proposed that the final potassiation product of red P@CN anode was KP, via the reaction of P + K + + e − ⇆ KP, leading to a theoretical capacity of 865 mAh g −1 . In the latest study, our group designed and fabricated a unique free‐standing nitrogen‐doped porous hollow carbon nanofibers as the matrix for the encapsulation of red P (red P@N‐PHCNFs) via the vaporization‐condensation approach. Two reversible peaks located at 1.05 and 0.14 V were displayed, corresponding to the stepwise potassiation of red P in the discharge process.…”

Section: P Anodes For Kibsmentioning

confidence: 99%

“…g,h) CV curves and galvanostatic discharge–charge profiles for the initial three cycles at 0.1 A g −1 of the red P@N‐PHCNFs anode; i) Ex‐situ XRD pattern of the red P/N‐HCNFs‐5. Reproduced with permission . Copyright 2019, American Chemical Society.…”

Section: P Anodes For Kibsmentioning

confidence: 99%

The Promise and Challenge of Phosphorus‐Based Composites as Anode Materials for Potassium‐Ion Batteries

et al. 2019

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Potassium-ion batteries (KIBs) are a core energy storage device that can meet the need for scalable and affordable stationary applications because they use low-cost and earth-abundant potassium. In addition, KIB shares a similar storage mechanism with current Li-ion batteries. As the key to optimizing a battery's performance, the development of high-performance electrode materials helps to increase the feasibility of KIB technology. In this sense, phosphorus-based materials (i.e., phosphorus and metal phosphide) with high theoretical capacity and low redox potential tick all the right boxes as a material of choice. A rapid glimpse at recent studies on phosphorus-based anode materials for advanced KIBs is provided, covering the synthetic methods, reaction mechanisms, electrochemical properties, and performances. In addition, several promising strategies are highlighted to address the imminent challenges faced by phosphorus-based anode materials, hoping to cast an insightful outlook for possible future direction in this field. Potassium-Ion BatteriesDedicated to the 70th anniversary of Dalian Institute of Chemical Physics, CAS

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“…[ 33 ] For KIBs, substitutional defects on carbon through heteroatom doping are considered as one promising way to improve reaction kinetics and cycling stability. [ 34–36 ] For instance, pyridinic nitrogen (PN) doping enhances the K–C bond around PN. [ 37 ] Boron (B) doping is helpful for cycling stability by preventing adsorbed K from clustering.…”

Section: Introductionmentioning

confidence: 99%

High Capacity Adsorption—Dominated Potassium and Sodium Ion Storage in Activated Crumpled Graphene

Lee

Kim

et al. 2020

Advanced Energy Materials

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Structurally and chemically defective activated‐crumbled graphene (A‐CG) is employed to achieve unique synergy of large reversible potassium (K) and sodium (Na) ion storage capacity with fast charging and extended cyclability. A‐CG synthesis consists of low temperature spraying of graphene oxide slurry, followed by partial reduction annealing and air activation. For K storage, the reversible capacities are 340 mAh g−1 at 0.04 A g−1, 261 mAh g−1 at 0.5 A g−1, and 210 mAh g−1 at 2 A g−1. For Na storage, the reversible capacities are 280 mAh g−1 at 0.04 A g−1, 191 mAh g−1 at 0.5 A g−1, and 151 mAh g−1 at 2 A g−1. A‐CG shows a stable intermediate rate (0.5 Ag−1) cycling with both K and Na, with minimal fade after 2800 and 8000 cycles. These are among the most favorable capacity—rate capability—cyclability combinations recorded for potassium‐ion battery and sodium‐ion battery carbons. Electroanalytical studies (cyclic voltammetry, galvanostatic intermittent titration technique, b‐value) and density functional theory (DFT) reveal that enhanced electrochemical performance originates from ion adsorption at various defects, such as Stone–Wales defects. Moreover, DFT highlights enhanced thermodynamic stability of A‐CG with adsorbed K versus with adsorbed Na, explaining the unexpected higher reversible capacity with the former.

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Boosting Potassium-Ion Battery Performance by Encapsulating Red Phosphorus in Free-Standing Nitrogen-Doped Porous Hollow Carbon Nanofibers

Cited by 254 publications

References 40 publications

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

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

The Promise and Challenge of Phosphorus‐Based Composites as Anode Materials for Potassium‐Ion Batteries

High Capacity Adsorption—Dominated Potassium and Sodium Ion Storage in Activated Crumpled Graphene

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