Three‐Dimensional Fibrous Network of Na<sub>0.21</sub>MnO<sub>2</sub> for Aqueous Sodium‐Ion Hybrid Supercapacitors

Karikalan, Natarajan; Karuppiah, Chelladurai; Chen, Shen‐Ming; Velmurugan, M.; Gnanaprakasam, P.

doi:10.1002/chem.201604878

Cited by 65 publications

(32 citation statements)

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“…In summary, Na-ion based transition metal compounds with 3D porous framework, large-sized tunnels, improved conductivity and cost-effective characteristics can be used as electrodes in sodium ion storage systems. As mentioned above, the chosen Na 0.44 MnO 2 and Na 0.21 MnO 2 with excellent cycling stability and good rate performance have been reported as cathodes in the Ti 3 C 2 T x /CNT// Na 0.44 MnO 2 and rGO//Na 0.21 MnO 2 SICs, respectively [41,80]. Moreover, the alluaudite-type Na 2 Fe 2 (SO 4 ) 3 with a theoretical capacity of 120 mA h g −1 and a high redox voltage of 3.8 V has been used as cathode to fabricate hybrid sodium ion pseudocapacitor by Zhu et al [77].…”

Section: Mxenesmentioning

confidence: 86%

Recent progress and future prospects of sodium-ion capacitors

2019

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To satisfy the requirements for various electric systems and energy storage devices with both high energy density and power density as well as long lifespan, sodium-ion capacitors (SICs) consisting of battery anode and supercapacitor cathode, have attracted much attention due to the abundant resources and low cost of sodium source. SICs bridge the gap between the batteries and the supercapacitors, which can be used as competitive candidates for large-scale energy storage. In this review, the battery-type anode materials and the capacitor-type cathode materials are classified and introduced in detail. The advantages of various electrolytes including organic electrolytes, aqueous electrolytes and ion liquid electrolytes are also discussed sequentially. In addition, from the perspective of practical value, the presentations of the SICs at the current situation and the potential application in urban rail are displayed. Finally, the challenge, future research and prospects towards the SICs are put forward.

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Section: Mxenesmentioning

confidence: 86%

Recent progress and future prospects of sodium-ion capacitors

2019

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“…In addition to those, the significant influence of the intercalated alkali-ions (e.g. Li + , Na + and K + ) themselves on the pseudocapacitive contribution should be taken into account when analyzing the specific capacitance increase [121].…”

Section: Supercapacitorsmentioning

confidence: 99%

MXene-based 3D porous macrostructures for electrochemical energy storage

et al. 2020

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2D transition metal carbides and nitrides (MXenes) have shown outstanding potential as electrode materials for energy storage applications due to a combination of metallic conductivity, wide interlayer spacing, and redox-active, metal oxide-like surfaces capable of exhibiting pseudocapacitive behavior. It is well known that 2D materials have a strong tendency to restack and aggregate, due to their strong van der Waals interactions, reducing their surface availability and inhibiting electrochemical performance. In order to overcome these problems, work has been done to assemble 2D materials into 3D porous macrostructures. Structuring 2D materials in 3D can prevent agglomeration, increase specific surface area and improve ion diffusion, whilst also adding chemical and mechanical stability. Although still in its infancy, a number of papers already show the potential of 3D MXene architectures for energy storage, but the impact of the processing parameters on the microstructure of the materials, and the influence this has on electrochemical properties is still yet to be fully quantified. In some situations the reproducibility of works is hindered by an oversight of parameters which can, directly or indirectly, influence the final architecture and its properties. This review compiles publications from 2011 up to 2020 about the research developments in 3D porous macrostructures using MXenes as building blocks, and assesses their application as battery and supercapacitor electrodes. Recommendations are also made for future works to achieve a better understanding and progress in the field. carbon and/or nitrogen and T x represents surface terminations which vary depending on the synthesis method used (for example, hydroxyl, oxygen, or fluorine) [10].With less than 10 years since their discovery, efforts are still mainly pointed towards the assessment of its potentialities and exploration of its properties, while their integration and application in various engineering fields are still very much in their infancy. Nevertheless, investigations have shown very competitive results in energy storage devices attracting a lot of interest in the field. In particular, the inner conductive metal carbide layers provide fast electron supply to electrochemically active sites, and functional groups on the surface, allow water intercalation and fast redox activity for pseudocapacitive energy storage [11][12][13]. Besides energy storage, MXenes also showed promising properties and have been researched for a variety of other areas, such as electromagnetic shielding, environmental, sensors, optoeletronic devices, and renewable energy [9,[14][15][16].For most practical applications, the MXene powders must be assembled or processed into a macroscopic sample such as, for example, an electrode. Conventionally this is done either by mixing it with a solvent to form a slurry which is painted over a substrate, by directly vacuum filtration, by spin coating, or by spraying the MXene suspension to form a compact film. During these processes, there i...

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“…As a transition metal element, manganese is appealing in energy storage field for its diversity of stable oxidation states (Mn 2+ , Mn 3+ , Mn 4+ ), crystal structures, morphology, and porosity . For example, MnO 2 have been widely used as electrode materials in supercapacitors . Na x MnO 2 is a kind of attractive battery‐type cathode material for NIBs, i.e., Na 0.44 MnO 2 , as shown in Figure a, because of its large‐size tunnels into which Na + can be readily inserted .…”

Section: Materials For Sodium‐ion Capacitorsmentioning

confidence: 99%

“…Subsequently, Wasiński et al demonstrated a novel NIC based on Na 0.4 MnO 2 cathode and AC anode, giving rise to a specific capacitance of 17.4 F g −1 . An aqueous NIC was developed by Chen and co‐workers in 2017, which take Na 0.21 MnO 2 and rGO as cathode and anode, respectively . The device exhibits a large operational voltage window of 0–2.7 V without any side effect (water splitting) for 1000 cycles with a capacitance retention of 86.7%.…”

Section: Materials For Sodium‐ion Capacitorsmentioning

confidence: 99%

Advanced Materials for Sodium‐Ion Capacitors with Superior Energy–Power Properties: Progress and Perspectives

Zhang

et al. 2019

Small

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10. 1002/smll.201902843. Developing electrochemical energy storage devices with high energy-power densities, long cycling life, as well as low cost is of great significance. Sodium-ion capacitors (NICs), with Na + as carriers, are composed of a high capacity battery-type electrode and a high rate capacitive electrode. However, unlike their lithium-ion analogues, the research on NICs is still in its infancy. Rational material designs still need to be developed to meet the increasing requirements for NICs with superior energy-power performance and low cost. In the past few years, various materials have been explored to develop NICs with the merits of superior electrochemical performance, low cost, good stability, and environmental friendliness. Here, the material design strategies for sodium-ion capacitors are summarized, with focus on cathode materials, anode materials, and electrolytes. The challenges and opportunities ahead for the future research on materials for NICs are also proposed. www.advancedsciencenews.com www.small-journal.com to LICs, NICs are still in their infancy stage with many difficulties for their practical application. [23] For example, many battery-type electrode materials for lithium ion storage cannot meet the requirements of NIC devices due to the large size of Na + ions. In addition, due to the redox potential of Na/Na + is 0.3 V higher than that of Li/Li + , the working voltage ranges of NICs are expected to be a little narrower than LICs, which may influence the energy densities of NICs. Moreover, the electrolyte should provide a rapid migration process of Na + ions. Therefore, the rational material design will play crucial roles in the electrochemical performance improvement of NICs.So far, there are few papers which summarize the recent progress in NIC research area. In particular, the materials used in NICs, including anode, cathode, and electrolyte, have not been systematically reviewed. In this article, we focus on the latest advances in the cathode materials, anode materials, and electrolytes for NICs. First, we review the energy storage mechanism and demonstrate the configurations of NICs; then, we summarize the recent progress on electrode materials, including anode materials, cathode materials, as well as different electrolytes for NICs; finally, the challenges and future prospects for NIC research are proposed.

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Three‐Dimensional Fibrous Network of Na_0.21MnO₂ for Aqueous Sodium‐Ion Hybrid Supercapacitors

Cited by 65 publications

References 58 publications

Recent progress and future prospects of sodium-ion capacitors

Recent progress and future prospects of sodium-ion capacitors

MXene-based 3D porous macrostructures for electrochemical energy storage

Advanced Materials for Sodium‐Ion Capacitors with Superior Energy–Power Properties: Progress and Perspectives

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Three‐Dimensional Fibrous Network of Na0.21MnO2 for Aqueous Sodium‐Ion Hybrid Supercapacitors

Cited by 65 publications

References 58 publications

Recent progress and future prospects of sodium-ion capacitors

Recent progress and future prospects of sodium-ion capacitors

MXene-based 3D porous macrostructures for electrochemical energy storage

Advanced Materials for Sodium‐Ion Capacitors with Superior Energy–Power Properties: Progress and Perspectives

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Three‐Dimensional Fibrous Network of Na_0.21MnO₂ for Aqueous Sodium‐Ion Hybrid Supercapacitors