Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials

el-Attar, Mahmoud; Allam, Nageh K.

doi:10.1039/d2ra00457g

Cited by 4 publications

(1 citation statement)

References 45 publications

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“…In general, there are two approaches to boost the ED of supercapacitors. The first approach is to enlarge the operating potential window by using a hybrid supercapacitor, which uses a capacitive material and battery-like material as negative and positive electrodes, respectively. − The second approach is by selecting an electrode with good electrical conductivity, high surface area, and good thermal and mechanical stability, which increases the capacitance and consequently the energy density. − …”

Section: Introductionmentioning

confidence: 99%

Optimized Synthesis of Nanostructured Trimetallic Mn–V–Fe Selenides with Battery-Type Behavior for High-Performance Hybrid Supercapacitors

2023

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The design and synthesis of innovative materials with a specific architecture are necessary to advance the supercapacitor industry. Recently, transition metal selenides have been identified as an auspicious type of material for energy storage devices due to their enormous electronic conductivity and high theoretical capacitance. Consequently, mono- and diselenides have been extensively investigated. Trimetallic selenides, however, are infrequently reported, and their charge storage mechanism is still not fully understood. Herein, earth-abundant trimetallic Mn–V–Fe selenide (MVF-Se) is successfully fabricated via a two-step hydrothermal approach. The chemical composition, structure, and morphology of the as-synthesized material have been thoroughly characterized. The electrochemical tests revealed that the MVF-Se electrode possesses a high areal capacitance of 16,212.88 mF cm–2 at 1 mA cm–2 in the three-electrode configuration. In addition, the assembled asymmetric supercapacitor device by coupling MVF-Se and activated carbon as the positive and negative electrodes, respectively, demonstrates a desirable 0.56 mWh cm–2 energy density at a 1.0 mW cm–2 power density. After 17,000 charge/discharge cycles, the device exhibits robust cyclic stability with a 95% capacitance retention.

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Section: Introductionmentioning

confidence: 99%

Optimized Synthesis of Nanostructured Trimetallic Mn–V–Fe Selenides with Battery-Type Behavior for High-Performance Hybrid Supercapacitors

2023

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Self‐Assembled Tent‐Like Nanocavities for Space‐Confined Stable Lithium Metal Anode

Zhang

et al. 2023

Adv Funct Materials

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Lithium metal is considered as a promising anode for its high energy density and low redox potential. However, dendrite growth and electrolyte-lithium reaction lead to poor cycling stability of lithium anodes. Herein, a spaceconfined strategy is proposed to realize stable Li metal anode by constructing a nonplanar interface with flexible tent-like nanocavities. The tent-like interface is achieved through the self-assembly of graphene oxide on zinc nanosheets, accompanied by the spontaneous formation of ZnOC bond. Remarkably, the ZnOC bond immobilizes the graphene oxide layer to ensure tent-like structural integrity, and shows excellent lithophilicity to induce homogeneous lithium deposition within nanocavities. Furthermore, the process of Li plating/ stripping is confined inside tent-like nanocavities to effectively decrease electrolyte content contact with fresh Li, which reduces hazardous electrolytelithium reaction and thus eliminates continuous consumption of Li metal. Consequently, the symmetrical cells with the tent-like interface deliver excellent long cycling performance over 1600 h at 1 mA cm −2 , and full batteries show high-capacity retention of 94.6% after 3000 cycles at 5 C. This strategy provides a unique flexible tent-like interface to achieve stable lithium metal anode.

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Recent development of two-dimensional tantalum dichalcogenides and their applications

Kumar

Pratap

Joshi

et al. 2023

Micro and Nanostructures

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Untapped potential of 2D charge density wave chalcogenides as negative supercapacitor electrode materials

Abstract: Charge density wave chalcogenides are efficient negative supercapacitor electrode materials with high quantum capacitance.

Cited by 4 publications

References 45 publications

Optimized Synthesis of Nanostructured Trimetallic Mn–V–Fe Selenides with Battery-Type Behavior for High-Performance Hybrid Supercapacitors

Optimized Synthesis of Nanostructured Trimetallic Mn–V–Fe Selenides with Battery-Type Behavior for High-Performance Hybrid Supercapacitors

Self‐Assembled Tent‐Like Nanocavities for Space‐Confined Stable Lithium Metal Anode

Recent development of two-dimensional tantalum dichalcogenides and their applications

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