Boosted pseudocapacitance contribution in lithium ion storage performance of Fe3O4/Fe7S8 anode by nanoscale heterostructuring

Zhao, Mingyu; Lian, Zixuan; Long, Ziyao; Fu, Bishi; Gao, Runhua; Li, Shuyang; Zhou, Yong‐Ning; Song, Yun

doi:10.1016/j.apsusc.2019.03.259

Cited by 17 publications

(7 citation statements)

References 50 publications

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“…When the b verges on 1.0, capacitive behaviour is dominated; when b tends to 0.5, the storage procedure is diffusion controlled; in scope of 0.5 to 1.0, the capacitive nature and diffusion are involved. 54,56 The fitted values of 0.63 and 0.53 for anodic and cathodic processes indicate that the electrode mainly has a capacitive nature, which is in step with the results obtained from the phase angle and frequency diagram ( Figure 5E) of EIS. The percentage of diffusion controlled and capacitive nature can be obtained using the following Equation (6) 55,57 :…”

Section: Exploration Of Reaction Conditionssupporting

confidence: 85%

“…On the basis of the CV curves shown in Figure A, the electrochemical performance was further explored. Typically, the formula between i (mA) and ϑ (mV s −1 ) can be illustrated as follows:

i = normala ϑ^{b},

\log ((), i) = \log ((), a) + normalb \times \log ((), ϑ) .

…”

Section: Resultsmentioning

confidence: 99%

“…In Equation , k 1 × ϑ and

k_{2} \times ϑ^{\frac{1}{2}}

are the contributions of capacitive and diffusion‐controlled processes, respectively . Figure B indicates that the capacitance‐controlled capacity comprises approximately 46.9% at 50 mV s −1 .…”

Section: Resultsmentioning

confidence: 99%

“…In Equation (6), k 1 × ϑ and k 2 × ϑ 1 2 are the contributions of capacitive and diffusion-controlled processes, respectively. 54,58 Figure 6B indicates that the capacitance- controlled capacity comprises approximately 46.9% at 50 mV s −1 . Contrast of the grey area to the total CV area in Figure 6C showed that the capacitance-controlled capacity increased from 34.7% to 38.3%, 41.4%, 46.9%, and 61.9% at 10 to 100 mV s −1 , respectively.…”

Section: Exploration Of Reaction Conditionsmentioning

confidence: 99%

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Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

et al. 2020

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Summary Amorphous MnO2 was attached to carbon nanotubes (CNTs) in 60 seconds by solid‐state microwave method. As electrodes in supercapacitors, the coactions of the MnO2 and CNT augmented the actual value of capacitance to 1250 F g−1, and cycle steadiness held 80% of the starting value after 7000 cycles. The equipped MnO2/CNT//AC asymmetric supercapacitor (ASC) manifested preferable energy density with 33.5 Wh kg−1 (at 400 W kg−1). Its glorious electrochemical properties of MnO2/CNT demonstrated that the microwave method has great potency to realise the composite of electrode materials.

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Section: Exploration Of Reaction Conditionssupporting

confidence: 85%

“…On the basis of the CV curves shown in Figure A, the electrochemical performance was further explored. Typically, the formula between i (mA) and ϑ (mV s −1 ) can be illustrated as follows:

i = normala ϑ^{b},

\log ((), i) = \log ((), a) + normalb \times \log ((), ϑ) .

…”

Section: Resultsmentioning

confidence: 99%

“…In Equation , k 1 × ϑ and

k_{2} \times ϑ^{\frac{1}{2}}

Section: Resultsmentioning

confidence: 99%

Section: Exploration Of Reaction Conditionsmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

et al. 2020

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“…[30][31][32] The plateau at 1.65 V is attributed to the formation of Li 2 Fe 3 O 4 (Equation 3). [33][34] In addition, the cathode peak at 0.72 V which transfer to 0.9 V in the subsequent cycle may attributed to the further lithiation process of Li 2 Fe 3 O 4 (Equation 4). [35] In the anodic scan, a sharp oxidation peak was observed at about 1.93 V, which is attributed to the formation of Li 2 FeS 2 (Equation 5) and Li 2-x FeS 2 (Equation 6) by the Fe 0 conversion reaction, respectively.…”

Section: Batteries and Supercapsmentioning

confidence: 99%

Sulfur‐Doped Carbon‐Wrapped Heterogeneous Fe₃O₄/Fe₇S₈/C Nanoplates as Stable Anode for Lithium‐Ion Batteries

Chen

Kong

Xie

et al. 2019

Batteries & Supercaps

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High‐capacity electrode materials have attracted tremendous attention in energy storage systems. However, the large volume expansion always causes breakdown of electrode materials and capacity fading. In this work, we report the preparation of heterogeneous Fe3O4/Fe7S8/C nanoplates with a high lithium diffusion coefficient and excellent lithium storage performance. The heterogeneous nanoplates can be derived from Fe‐MOF octahedra during the sulfidation process. As an anode for lithium‐ion batteries, the Fe3O4/Fe7S8/C composite exhibits higher specific capacity and better rate capability than Fe3O4/C and Fe7S8/C counterparts. The Fe3O4/Fe7S8/C nanoplates deliver a reversible capacity of 859 mA h g−1 after 100 cycles at 0.1 A g−1. Even at 2 A g−1, a capacity of 549 mA h g−1 can still be remained. The good performances are attributed to the small nanocrystallites, high surface area, and the heterogeneous phase boundaries. The strategy can be potentially applied to other metal oxide/metal sulfide composite phases or even bimetallic sulfides and bimetal oxides for high performance lithium‐ion batteries.

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Multielectron Conversion: Peculiar Transition Metal Sulfides with Mixed Vulcanized States toward High‐Capacity Metal‐Ion Storage

Song

Wang

et al. 2023

Advanced Energy Materials

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Transition metal sulfides with mixed vulcanized states (TMS-mVs) possess tremendous potential to realize highcapacity, superior redox reactions, and structural reversibility for metal-ion (M n+ ) storage owing to their multielectron reactions caused by the simultaneous participation of transition metal (TM) cations and S 2 2− anions as well as multifarious TM or S valence states. Here, recent advances are systematically introduced regarding the mainstream TMS-mVs that can be applied to M n+ storage. These TMS-mVs can be divided into two categories of TMS, those with mixed sulfur-valence states (TMS-mSs) and those with mixed metal-valence states (TMS-mMs). It is found that TMS-mV anodes mainly experience three reaction mechanisms, inculding insertion-accompanied conversion, insertion, and conversion reactions. During the reversible charge process, Li 2 S is possibly oxidized into polysulfides or even S. TMS-mVs have the ability to transfer more electrons than other homogeneous TMSs. TMS-mS anodes usually present higher theoretical specific capacities than TMS-mM anodes. In these TMS-mV anodes, Mo-based, V-based, and Co-based TMS-mM anodes exhibit good electrochemical reversibility, Ni-based TMS-mM anodes exhibit moderate electrochemical reversibility, and Fe-based TMS-mM and TMS-mS anodes exhibit poor electrochemical reversibility. The strategies for enhancement of their electrochemical performance are classified into composite, coating, nanostructure, heterointerface, and lattice engineering.

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Boosted pseudocapacitance contribution in lithium ion storage performance of Fe3O4/Fe7S8 anode by nanoscale heterostructuring

Cited by 17 publications

References 50 publications

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Sulfur‐Doped Carbon‐Wrapped Heterogeneous Fe₃O₄/Fe₇S₈/C Nanoplates as Stable Anode for Lithium‐Ion Batteries

Multielectron Conversion: Peculiar Transition Metal Sulfides with Mixed Vulcanized States toward High‐Capacity Metal‐Ion Storage

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Boosted pseudocapacitance contribution in lithium ion storage performance of Fe3O4/Fe7S8 anode by nanoscale heterostructuring

Cited by 17 publications

References 50 publications

Synthesis and characterisation of amorphous MnO 2 /CNT via solid‐state microwave for high‐performance supercapacitors

Synthesis and characterisation of amorphous MnO 2 /CNT via solid‐state microwave for high‐performance supercapacitors

Sulfur‐Doped Carbon‐Wrapped Heterogeneous Fe3O4/Fe7S8/C Nanoplates as Stable Anode for Lithium‐Ion Batteries

Multielectron Conversion: Peculiar Transition Metal Sulfides with Mixed Vulcanized States toward High‐Capacity Metal‐Ion Storage

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Product

Resources

About

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Synthesis and characterisation of amorphous MnO ₂ /CNT via solid‐state microwave for high‐performance supercapacitors

Sulfur‐Doped Carbon‐Wrapped Heterogeneous Fe₃O₄/Fe₇S₈/C Nanoplates as Stable Anode for Lithium‐Ion Batteries