Coupling of bowl-like VS2 nanosheet arrays and carbon nanofiber enables ultrafast Na+-Storage and robust flexibility for sodium-ion hybrid capacitors

Xu, Dongming; Wang, Huanwen; Qiu, Ruyun; Wang, Qiang; Mao, Zongqiang; Jiang, Yingjun; Wang, Rui; He, Beibei; Gong, Yansheng; Li, Debao; Hu, Xianluo

doi:10.1016/j.ensm.2020.03.002

Cited by 92 publications

(62 citation statements)

References 50 publications

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“…The charge accumulation region around the interfaces of MoSe 2 /C is more pronounced than that of MoSe 2 /MoSe 2 , confirming the former has a stronger binding with Na + . [47,48] In addition, the corresponding bader charge was introduced to determine the characteristics of sodium ions. (Figure 5f), indicating higher electronic conductivity for MoSe 2 /C than pure MoSe 2 .…”

Section: Dft Calculation Of Na Storage Propertymentioning

confidence: 99%

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

Fei

Wang

et al. 2020

Advanced Energy Materials

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175

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Metal‐ion capacitors are being widely studied to reach a balance between power and energy output by combining the merits of conventional batteries and capacitors. The main challenge for Na‐ion capacitors is that the battery‐type anode usually has unsatisfactory power density and long‐term stability since most Na host materials have a poor kinetic and structural stability. Herein, asymmetric hollow bowl‐like carbon (HBC) materials are rationally designed and fabricated through an in situ hard‐template approach. The formation originates from a subtle control of capillary force and the mechanical strength of the carbon shell. The HBCs possess abundant mesopores, high volumes of accessible surface area as well as an open macropore network. As a 3D host, MoSe2 nanocrystals are anchored onto the HBC matrix by a solid‐phase reaction. The obtained MoSe2@HBC nanobowl electrode exhibits pseudocapacitive sodium storage with fast kinetics, improved capacity at high currents, and cycle stability, which is also supported by DFT calculations. Sodium ion capacitor full cells are fabricated using the two bowl‐like architectures (MoSe2@HBC as the anode and HBC as the cathode), which deliver high energy and power densities, long cycle life, and a comparably low self‐discharge rate. Moreover, application of the HBC in a zinc‐ion capacitor (ZIC) is also demonstrated.

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Section: Dft Calculation Of Na Storage Propertymentioning

confidence: 99%

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

Fei

Wang

et al. 2020

Advanced Energy Materials

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175

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“…Layered transition metal sulfides have been recently explored as insertion host materials for a variety of ions including Li + , Na + , K + , and Zn 2+ . [ 51‐54 ] In Na + storage, there has been mixed success in achieving pseudocapacitive behavior in layered sulfides. [ 55 ] Layered VS 2 , which consists of S‐V‐S stacks held together by Van der Waals forces, provides 2D‐channels for rapid ion intercalation and metallic electronic properties ( Figure a).…”

Section: Vanadium Sulfidesmentioning

confidence: 99%

Pseudocapacitive Vanadium‐based Materials toward High‐Rate Sodium‐Ion Storage

Wei

DeBlock

Butts

et al. 2020

Energy & Environ Materials

110

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Sodium‐ion battery materials and devices are promising candidates for large‐scale applications, owing to the abundance and low cost of sodium sources. Emerging sodium‐ion pseudocapacitive materials provide one approach for achieving high capacity at high rates, but are currently not well understood. Herein, a comprehensive overview of the fundamentals and electrochemical behaviors of vanadium‐based pseudocapacitive materials for sodium‐ion storage is presented. The insight of sodium‐ion storage mechanisms for various vanadium‐based materials, including vanadium oxides, vanadates, vanadium sulfides, nitrides, and carbides are systematically discussed and summarized. In particular, areas for further development to improve fundamental understanding of electrochemical and structural properties of materials are identified. Finally, we provide a perspective on the application of pseudocapacitive materials in high‐power and high‐energy sodium‐ion storage devices (e.g., sodium‐ion capacitors).

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“…As a result, this bottleneck makes the development of advanced anode materials for SICs a popular imperative. [6][7][8] Recent exploration of 2D layered transition metal dichalcogenides (TMDs) suggests a great potential in the field of energy storage. [9][10][11][12] As one typical member of TMDs, MoSe 2 is obtaining considerable attention.…”

Section: Nano Heterostructures Relying On Their Versatile Constructiomentioning

confidence: 99%

2D Sandwiched Nano Heterostructures Endow MoSe₂/TiO₂₋_x/Graphene with High Rate and Durability for Sodium Ion Capacitor and Its Solid Electrolyte Interphase Dependent Sodiation/Desodiation Mechanism

Liu

Zhang

et al. 2020

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Nano heterostructures relying on their versatile construction and the breadth of combined functionality have shown great potential in energy storage fields. Herein, 2D sandwiched MoSe2/TiO2−x/graphene nano heterostructures are designed by integrating structural and functional effects of each component, aiming to address the rate capability and cyclic stability of MoSe2 for sodium ion capacitors (SICs). These 2D nano heterostructures based on graphene platform can facilitate the interfacial electron transport, giving rise to fast reaction kinetics. Meanwhile, the 2D open structure induces a large extent of surface capacitive contribution, eventually leading to a high rate capability (415.2 mAh g−1@ 5 A g−1). An ultrathin oxygen deficient TiO2−x layer sandwiched in these nano heterostructures provides a strong chemical‐anchoring regarding the products generated during the sodiation/desodiation process, securing the entire cyclic stability. The associated sodiation/desodiation mechanism is revealed by operando and ex situ characterizations, which exhibits a strong solid electrolyte interphase (SEI) dependence. The simulations verify the dependent sodiation products and enhanced heterostructural chemical‐anchoring. Assembled SICs based on these nano heterostructures anode exhibit high initial Coulombic efficiency, energy/power densities, and long cycle life, shedding new light on the design of nano heterostructure electrodes for high performance energy storage application.

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Coupling of bowl-like VS2 nanosheet arrays and carbon nanofiber enables ultrafast Na+-Storage and robust flexibility for sodium-ion hybrid capacitors

Cited by 92 publications

References 50 publications

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

Pseudocapacitive Vanadium‐based Materials toward High‐Rate Sodium‐Ion Storage

2D Sandwiched Nano Heterostructures Endow MoSe₂/TiO₂₋_x/Graphene with High Rate and Durability for Sodium Ion Capacitor and Its Solid Electrolyte Interphase Dependent Sodiation/Desodiation Mechanism

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Coupling of bowl-like VS2 nanosheet arrays and carbon nanofiber enables ultrafast Na+-Storage and robust flexibility for sodium-ion hybrid capacitors

Cited by 92 publications

References 50 publications

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

Pseudocapacitive Vanadium‐based Materials toward High‐Rate Sodium‐Ion Storage

2D Sandwiched Nano Heterostructures Endow MoSe2/TiO2−x/Graphene with High Rate and Durability for Sodium Ion Capacitor and Its Solid Electrolyte Interphase Dependent Sodiation/Desodiation Mechanism

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2D Sandwiched Nano Heterostructures Endow MoSe₂/TiO₂₋_x/Graphene with High Rate and Durability for Sodium Ion Capacitor and Its Solid Electrolyte Interphase Dependent Sodiation/Desodiation Mechanism