Electrostatic interaction in electrospun nanofibers: Double-layer carbon protection of CoFe2O4 nanosheets enabling ultralong-life and ultrahigh-rate lithium ion storage

Zhang, Longhai; Wei, Tong; Jiang, Zimu; Liu, Chaoqun; Han, Jun; Jin, Chao; Sheng, Lizhi; Zhou, Qihang; Yuan, Libo; Fan, Zhuangjun

doi:10.1016/j.nanoen.2018.03.053

Cited by 106 publications

(38 citation statements)

References 62 publications

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“…Eco-friendly energy storage technologies continue to attract wide attentions due to the serious environmental pollution and energy consumption [1][2][3][4][5][6][7][8]. Rechargeable aqueous metal-ion (Li + , Na + , Zn 2+ , Mg 2+ , Ca 2+ , etc.)…”

Section: Introductionmentioning

confidence: 99%

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

et al. 2020

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HIGHLIGHTS• A layered sodium-ion/crystal water co-intercalated Na 0.55 Mn 2 O 4 ·0.57H 2 O (NMOH) cathode is synthesized successfully with a selectively etching method for zinc-ion batteries.• A displacement/intercalation mechanism is confirmed in the Mn-based cathode for the first time.• The NMOH cathode delivers a competitive reversible capacity of 201.6 mA h g −1 at 500 mA g −1 after 400 cycles.ABSTRACT Mn-based rechargeable aqueous zinc-ion batteries (ZIBs) are highly promising because of their high operating voltages, attractive energy densities, and eco-friendliness. However, the electrochemical performances of Mn-based cathodes usually suffer from their serious structure transformation upon charge/discharge cycling.Herein, we report a layered sodium-ion/crystal water co-intercalated Birnessite cathode with the formula of Na 0.55 Mn 2 O 4 ·0.57H 2 O (NMOH) for high-performance aqueous ZIBs. A displacement/intercalation electrochemical mechanism was confirmed in the Mn-based cathode for the first time. Na + and crystal water enlarge the interlayer distance to enhance the insertion of Zn 2+ , and some sodium ions are replaced with Zn 2+ in the first cycle to further stabilize the layered structure for subsequent reversible Zn 2+ /H + insertion/extraction, resulting in exceptional specific capacities and satisfactory structural stabilities. Additionally, a pseudo-capacitance derived from the surface-adsorbed Na + also contributes to the electrochemical performances. The NMOH cathode not only delivers high reversible capacities of 389.8 and 87.1 mA h g −1 at current densities of 200 and 1500 mA g −1 , respectively, but also maintains a good long-cycling performance of 201.6 mA h g −1 at a high current density of 500 mA g −1 after 400 cycles, which makes the NMOH cathode competitive for practical applications.Zinc sulfate (ZnSO 4 ·H 2 O, 99.9%), sodium sulfate (Na 2 SO 4 , 99.9%), and manganese sulfate (MnSO 4 ·H 2 O, 99.9%) were purchased from Aladdin (China). Sodium silicate Nano-Micro Lett.

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Section: Introductionmentioning

confidence: 99%

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

et al. 2020

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“…More than 700 mAh g −1 of total capacity of the composite was obtained when CoFe2O4 is encapsulated into carbon nanofibers with 36% carbon content [71]. A list of recently achieved record values may be found in [72]. We note that excessive capacity beyond the theory values in transition metal oxide/carbon nanomaterials have been associated, e.g., to decomposition of electrolyte and formation of a polymer/gel-like film on the nanoparticles [73].…”

Section: Cofe2o4@cntmentioning

confidence: 86%

Filled Carbon Nanotubes as Anode Materials for Lithium-Ion Batteries

et al. 2020

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Downsizing well-established materials to the nanoscale is a key route to novel functionalities, in particular if different functionalities are merged in hybrid nanomaterials. Hybrid carbon-based hierarchical nanostructures are particularly promising for electrochemical energy storage since they combine benefits of nanosize effects, enhanced electrical conductivity and integrity of bulk materials. We show that endohedral multiwalled carbon nanotubes (CNT) encapsulating high-capacity (here: conversion and alloying) electrode materials have a high potential for use in anode materials for lithium-ion batteries (LIB). There are two essential characteristics of filled CNT relevant for application in electrochemical energy storage: (1) rigid hollow cavities of the CNT provide upper limits for nanoparticles in their inner cavities which are both separated from the fillings of other CNT and protected against degradation. In particular, the CNT shells resist strong volume changes of encapsulates in response to electrochemical cycling, which in conventional conversion and alloying materials hinders application in energy storage devices.(2) Carbon mantles ensure electrical contact to the active material as they are unaffected by potential cracks of the encapsulate and form a stable conductive network in the electrode compound. Our studies confirm that encapsulates are electrochemically active and can achieve full theoretical reversible capacity. The results imply that encapsulating nanostructures inside CNT can provide a route to new high-performance nanocomposite anode materials for LIB.

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“…CoFe 2 O 4 can increase the capacitance of the composite electrode and have a good electrochemical activity, which conducts to the increase in energy and power densities of a supercapacitor. Accordingly, various wet chemical techniques have been evolved to manufacture CoFe 2 O 4 with different morphologies such as nanoparticles, nanosheets, nanoplates, nanomesh arrays, 3D hierarchical flower‐like nanostructures and nanoflakes . However, CoFe 2 O 4 has exhibited limitations such as low rate capability and poor repeatability during cycling.…”

Section: Introductionmentioning

confidence: 99%

CoFe₂O₄@Carbon Spheres Electrode: A One‐Step Solvothermal Method for Enhancing the Electrochemical Performance of Hybrid Supercapacitors

et al. 2020

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Constructing electrode materials with high energy densities are the effective way to develop asymmetric supercapacitor devices. Therefore, the inlay of conductive materials into pseudocapacitive constituents is a practical approach to increase the performance of supercapacitor electrodes. Herein, we declare a facile one-step as an economic strategy for tailoring carbon spheres (CSs) impregnated by CoFe 2 O 4 to form a CoFe 2 O 4 @CSs composite. The CoFe 2 O 4 @CSs composite was fully characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM), which evidenced that CoFe 2 O 4 nanoparticles were densely cored inside the carbon spheres. Moreover, the electrochemical characterization of the CoFe 2 O 4 @CSs composite was manifested high specific capacitance of (600 F/g) at a current density (1 A/g), high performance rate, and cycling stability. CoFe 2 O 4 @CSs has achieved capacitance retention of 94.1 % after 5000 charge/discharge cycles at a current density of 20 mA/g. The device-based asymmetric supercapacitors were found to improve the energy density to 27.08 Wh/kg at a power density of 750 W/kg with 99 % capacitance retention, which is higher than the values previously reported. The exceptional performance of CoFe 2 O 4 @CSs composites gives high priority for such materials in variant electrochemical fields, owing to the harmony between CoFe 2 O 4 nanoparticles and carbon spheres.[a] Dr.

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Electrostatic interaction in electrospun nanofibers: Double-layer carbon protection of CoFe2O4 nanosheets enabling ultralong-life and ultrahigh-rate lithium ion storage

Cited by 106 publications

References 62 publications

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

Filled Carbon Nanotubes as Anode Materials for Lithium-Ion Batteries

CoFe₂O₄@Carbon Spheres Electrode: A One‐Step Solvothermal Method for Enhancing the Electrochemical Performance of Hybrid Supercapacitors

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Electrostatic interaction in electrospun nanofibers: Double-layer carbon protection of CoFe2O4 nanosheets enabling ultralong-life and ultrahigh-rate lithium ion storage

Cited by 106 publications

References 62 publications

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

Layered Birnessite Cathode with a Displacement/Intercalation Mechanism for High-Performance Aqueous Zinc-Ion Batteries

Filled Carbon Nanotubes as Anode Materials for Lithium-Ion Batteries

CoFe2O4@Carbon Spheres Electrode: A One‐Step Solvothermal Method for Enhancing the Electrochemical Performance of Hybrid Supercapacitors

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Product

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CoFe₂O₄@Carbon Spheres Electrode: A One‐Step Solvothermal Method for Enhancing the Electrochemical Performance of Hybrid Supercapacitors