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Graphene‐Encapsulated FeS2 in Carbon Fibers as High Reversible Anodes for Na+/K+ Batteries in a Wide Temperature Range

Developing low cost, long life, and high capacity rechargeable batteries is a critical factor towards developing next‐generation energy storage devices for practical applications. Therefore, a simple method to prepare graphene‐coated FeS embedded in carbon nanofibers is employed; the double protecti... Full description

Journal Title: Small March 2019, Vol.15(10), pp.n/a-n/a
Main Author: Chen, Changmiao
Other Authors: Yang, Yincai , Tang, Xuan , Qiu, Renhua , Wang, Shuangyin , Cao, Guozhong , Zhang, Ming
Format: Electronic Article Electronic Article
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ID: ISSN: 1613-6810 ; E-ISSN: 1613-6829 ; DOI: 10.1002/smll.201804740
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recordid: wj10.1002/smll.201804740
title: Graphene‐Encapsulated FeS2 in Carbon Fibers as High Reversible Anodes for Na+/K+ Batteries in a Wide Temperature Range
format: Article
creator:
  • Chen, Changmiao
  • Yang, Yincai
  • Tang, Xuan
  • Qiu, Renhua
  • Wang, Shuangyin
  • Cao, Guozhong
  • Zhang, Ming
subjects:
  • Graphene Coated
  • High Energy Density
  • Low‐Temperature Batteries
  • Pyrite Fes 2
  • Sodium/Potassium‐Ion Batteries
ispartof: Small, March 2019, Vol.15(10), pp.n/a-n/a
description: Developing low cost, long life, and high capacity rechargeable batteries is a critical factor towards developing next‐generation energy storage devices for practical applications. Therefore, a simple method to prepare graphene‐coated FeS embedded in carbon nanofibers is employed; the double protection from graphene coating and carbon fibers ensures high reversibility of FeS during sodiation/desodiation and improved conductivity, resulting in high rate capacity and long‐term life for Na (305.5 mAh g at 3 A g after 2450 cycles) and K (120 mAh g at 1 A g after 680 cycles) storage at room temperature. Benefitting from the enhanced conductivity and protection on graphene‐encapsulated FeS nanoparticles, the composites exhibit excellent electrochemical performance under low temperature (0 and −20 °C), and temperature tolerance with stable capacity as sodium‐ion half‐cells. The Na‐ion full‐cells based on the above composites and NaV(PO) can afford reversible capacity of 95 mAh g at room temperature. Furthermore, the full‐cells deliver promising discharge capacity (50 mAh g at 0 °C, 43 mAh g at −20 °C) and high energy density at low temperatures. Density functional theory calculations imply that graphene coating can effectively decrease the Na diffusion barrier between FeS and graphene heterointerface and promote the reversibility of Na storage in FeS, resulting in advanced Na storage properties. is synthesized, showing high rate capability in Na‐ion (305.5 mAh g at 3 A g) and K‐ion (120 mAh g at 1 A g) half‐cells. In particular, they deliver stable Na storage behavior at low temperatures (0 and −20 °C), and the FeS@graphene@carbon nanofiber//NaV(PO) Na‐ion full‐cells exhibit remarkable capacity and energy density under room/low temperature.
language:
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identifier: ISSN: 1613-6810 ; E-ISSN: 1613-6829 ; DOI: 10.1002/smll.201804740
fulltext: fulltext
issn:
  • 1613-6810
  • 16136810
  • 1613-6829
  • 16136829
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titleGraphene‐Encapsulated FeS2 in Carbon Fibers as High Reversible Anodes for Na+/K+ Batteries in a Wide Temperature Range
creatorChen, Changmiao ; Yang, Yincai ; Tang, Xuan ; Qiu, Renhua ; Wang, Shuangyin ; Cao, Guozhong ; Zhang, Ming
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subjectGraphene Coated ; High Energy Density ; Low‐Temperature Batteries ; Pyrite Fes 2 ; Sodium/Potassium‐Ion Batteries
descriptionDeveloping low cost, long life, and high capacity rechargeable batteries is a critical factor towards developing next‐generation energy storage devices for practical applications. Therefore, a simple method to prepare graphene‐coated FeS embedded in carbon nanofibers is employed; the double protection from graphene coating and carbon fibers ensures high reversibility of FeS during sodiation/desodiation and improved conductivity, resulting in high rate capacity and long‐term life for Na (305.5 mAh g at 3 A g after 2450 cycles) and K (120 mAh g at 1 A g after 680 cycles) storage at room temperature. Benefitting from the enhanced conductivity and protection on graphene‐encapsulated FeS nanoparticles, the composites exhibit excellent electrochemical performance under low temperature (0 and −20 °C), and temperature tolerance with stable capacity as sodium‐ion half‐cells. The Na‐ion full‐cells based on the above composites and NaV(PO) can afford reversible capacity of 95 mAh g at room temperature. Furthermore, the full‐cells deliver promising discharge capacity (50 mAh g at 0 °C, 43 mAh g at −20 °C) and high energy density at low temperatures. Density functional theory calculations imply that graphene coating can effectively decrease the Na diffusion barrier between FeS and graphene heterointerface and promote the reversibility of Na storage in FeS, resulting in advanced Na storage properties. is synthesized, showing high rate capability in Na‐ion (305.5 mAh g at 3 A g) and K‐ion (120 mAh g at 1 A g) half‐cells. In particular, they deliver stable Na storage behavior at low temperatures (0 and −20 °C), and the FeS@graphene@carbon nanofiber//NaV(PO) Na‐ion full‐cells exhibit remarkable capacity and energy density under room/low temperature.
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titleGraphene‐Encapsulated FeS2 in Carbon Fibers as High Reversible Anodes for Na+/K+ Batteries in a Wide Temperature Range
descriptionDeveloping low cost, long life, and high capacity rechargeable batteries is a critical factor towards developing next‐generation energy storage devices for practical applications. Therefore, a simple method to prepare graphene‐coated FeS embedded in carbon nanofibers is employed; the double protection from graphene coating and carbon fibers ensures high reversibility of FeS during sodiation/desodiation and improved conductivity, resulting in high rate capacity and long‐term life for Na (305.5 mAh g at 3 A g after 2450 cycles) and K (120 mAh g at 1 A g after 680 cycles) storage at room temperature. Benefitting from the enhanced conductivity and protection on graphene‐encapsulated FeS nanoparticles, the composites exhibit excellent electrochemical performance under low temperature (0 and −20 °C), and temperature tolerance with stable capacity as sodium‐ion half‐cells. The Na‐ion full‐cells based on the above composites and NaV(PO) can afford reversible capacity of 95 mAh g at room temperature. Furthermore, the full‐cells deliver promising discharge capacity (50 mAh g at 0 °C, 43 mAh g at −20 °C) and high energy density at low temperatures. Density functional theory calculations imply that graphene coating can effectively decrease the Na diffusion barrier between FeS and graphene heterointerface and promote the reversibility of Na storage in FeS, resulting in advanced Na storage properties. is synthesized, showing high rate capability in Na‐ion (305.5 mAh g at 3 A g) and K‐ion (120 mAh g at 1 A g) half‐cells. In particular, they deliver stable Na storage behavior at low temperatures (0 and −20 °C), and the FeS@graphene@carbon nanofiber//NaV(PO) Na‐ion full‐cells exhibit remarkable capacity and energy density under room/low temperature.
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abstractDeveloping low cost, long life, and high capacity rechargeable batteries is a critical factor towards developing next‐generation energy storage devices for practical applications. Therefore, a simple method to prepare graphene‐coated FeS embedded in carbon nanofibers is employed; the double protection from graphene coating and carbon fibers ensures high reversibility of FeS during sodiation/desodiation and improved conductivity, resulting in high rate capacity and long‐term life for Na (305.5 mAh g at 3 A g after 2450 cycles) and K (120 mAh g at 1 A g after 680 cycles) storage at room temperature. Benefitting from the enhanced conductivity and protection on graphene‐encapsulated FeS nanoparticles, the composites exhibit excellent electrochemical performance under low temperature (0 and −20 °C), and temperature tolerance with stable capacity as sodium‐ion half‐cells. The Na‐ion full‐cells based on the above composites and NaV(PO) can afford reversible capacity of 95 mAh g at room temperature. Furthermore, the full‐cells deliver promising discharge capacity (50 mAh g at 0 °C, 43 mAh g at −20 °C) and high energy density at low temperatures. Density functional theory calculations imply that graphene coating can effectively decrease the Na diffusion barrier between FeS and graphene heterointerface and promote the reversibility of Na storage in FeS, resulting in advanced Na storage properties. is synthesized, showing high rate capability in Na‐ion (305.5 mAh g at 3 A g) and K‐ion (120 mAh g at 1 A g) half‐cells. In particular, they deliver stable Na storage behavior at low temperatures (0 and −20 °C), and the FeS@graphene@carbon nanofiber//NaV(PO) Na‐ion full‐cells exhibit remarkable capacity and energy density under room/low temperature.
doi10.1002/smll.201804740
pages1-11
orcididhttps://orcid.org/0000-0001-8634-299X
date2019-03