3D carbon foam-supported WS<sub>2</sub>nanosheets for cable-shaped flexible sodium ion batteries

Wang, Ye; Kong, Dezhi; Huang, Shaozhuan; Shi, Yumeng; Ding, Meng; Lim, Yew Von; Xu, Tingting; Chen, Fuming; Li, Xinjian; Yang, Hui Ying

doi:10.1039/c8ta02773k

Cited by 119 publications

(57 citation statements)

References 72 publications

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“…These findings indicate the NCS formation are reversible after the first sodiated conversion process. However, the crystallite quality is much more deteriorated in contrast to the fresh anode which explains the weak XRD patterns in the operando XRD findings …”

Section: Resultsmentioning

confidence: 97%

Explicating the Sodium Storage Kinetics and Redox Mechanism of Highly Pseudocapacitive Binary Transition Metal Sulfide via Operando Techniques and Ab Initio Evaluation

Lim

Huang

et al. 2019

Small Methods

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The economic advantage of sodium resources has triggered worldwide enthusiasm in sodium‐ion batteries (SIBs). As a new breed of transition metal sulfides, binary metal sulfides (BMS) have garnered increasing interests due to its pseudocapacitive capabilities but with limited reports to address its potentials. To address them, bimetallic nickel cobalt sulfide (NiCo2S4, or NCS) embedded in graphene aerogel matrix (NCSGO) with excellent reaction kinetics and rate performance are studied by first‐principles methods and operando techniques to elucidate its sodiation kinetics and redox mechanism. The kinetic analysis on sodiation behavior reveals a major contribution of pseudocapacitance versus total capacity, providing fast reaction kinetics and highly reversible cycling. The sodiation dynamics are unraveled by first‐principles approach manifesting favorable Na+ adsorption kinetics (<−2.1 eV) and extremely low diffusion barrier (0.28 eV), indicating the strong adsorption and diffusion capability for SIBs. The redox mechanism is studied and confirmed via operando techniques that NCS‐based electrodes are based on both a combination of intercalation and conversion reactions. Following the results of the joint experimental‐computational approach, the excellent BMS SIBs performance enabled by conversion‐based and fast pseudocapacitive sodiation kinetics provides a promising strategy for developing SIBs anodes with both high specific capacity and fast rate response.

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Section: Resultsmentioning

confidence: 97%

Explicating the Sodium Storage Kinetics and Redox Mechanism of Highly Pseudocapacitive Binary Transition Metal Sulfide via Operando Techniques and Ab Initio Evaluation

Lim

Huang

et al. 2019

Small Methods

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“…Sodium ion batteries (SIBs) have aroused great interests as a promising substitute to conventional lithium ion batteries (LIBs) owing to the overwhelming superiority in low cost and abundant natural resources [1][2][3][4]. However, the sluggish reaction kinetics induced by the larger ionic radius of Na ions deteriorates their electrochemical properties seriously [5,6].…”

Section: Introductionmentioning

confidence: 99%

Boosting Sodium Storage of Fe1−xS/MoS2 Composite via Heterointerface Engineering

Chen

Huang

et al. 2019

Nano-Micro Lett.

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Improving the cycling stability of metal sulfide-based anode materials at high rate is of great significance for advanced sodium ion batteries. However, the sluggish reaction kinetics is a big obstacle for the development of high-performance sodium storage electrodes. Herein, we have rationally engineered the heterointerface by designing the Fe1−xS/MoS2 heterostructure with abundant “ion reservoir” to endow the electrode with excellent cycling stability and rate capability, which is proved by a series of in and ex situ electrochemical investigations. Density functional theory calculations further reveal that the heterointerface greatly decreases sodium ion diffusion barrier and facilitates charge-transfer kinetics. Our present findings not only provide a deep analysis on the correlation between the structure and performance, but also draw inspiration for rational heterointerface engineering toward the next-generation high-performance energy storage devices.

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“…The preparation procedures above mainly involved a hydrothermal redox reaction and an annealing‐assistant crystal transformation. Melamine foam was chosen as a precursor for NCFs due to its 3D network skeleton and metal‐free character . The temperature of 800 °C was chosen as the pyrolysis temperature of melamine foam for the balance of both optimal conductivity and mechanical properties.…”

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confidence: 99%

3D Hollow α‐MnO₂ Framework as an Efficient Electrocatalyst for Lithium–Oxygen Batteries

Liu

Zeng

et al. 2019

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Lithium–oxygen (Li–O2) batteries are attracting more attention owing to their superior theoretical energy density compared to conventional Li‐ion battery systems. With regards to the catalytically electrochemical reaction on a cathode, the electrocatalyst plays a key role in determining the performance of Li–O2 batteries. Herein, a new 3D hollow α‐MnO2 framework (3D α‐MnO2) with porous wall assembled by hierarchical α‐MnO2 nanowires is prepared by a template‐induced hydrothermal reaction and subsequent annealing treatment. Such a distinctive structure provides some essential properties for Li–O2 batteries including the intrinsic high catalytic activity of α‐MnO2, more catalytic active sites of hierarchical α‐MnO2 nanowires on 3D framework, continuous hollow network and rich porosity for the storage of discharge product aggregations, and oxygen diffusion. As a consequence, 3D α‐MnO2 achieves a high specific capacity of 8583 mA h g−1 at a current density of 100 mA g−1, a superior rate capacity of 6311 mA h g−1 at 300 mA g−1, and a very good cycling stability of 170 cycles at a current density of 200 mA g−1 with a fixed capacity of 1000 mA h g−1. Importantly, the presented design strategy of 3D hollow framework in this work could be extended to other catalytic cathode design for Li–O2 batteries.

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3D carbon foam-supported WS₂nanosheets for cable-shaped flexible sodium ion batteries

Abstract: NGQDs-WS2/3DCF three-dimensional nanoarchitecture was designed and synthesized as a high-performance flexible and free-standing anode electrode for cable-shaped sodium-ion batteries.

Cited by 119 publications

References 72 publications

Explicating the Sodium Storage Kinetics and Redox Mechanism of Highly Pseudocapacitive Binary Transition Metal Sulfide via Operando Techniques and Ab Initio Evaluation

Explicating the Sodium Storage Kinetics and Redox Mechanism of Highly Pseudocapacitive Binary Transition Metal Sulfide via Operando Techniques and Ab Initio Evaluation

Boosting Sodium Storage of Fe1−xS/MoS2 Composite via Heterointerface Engineering

3D Hollow α‐MnO₂ Framework as an Efficient Electrocatalyst for Lithium–Oxygen Batteries

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3D carbon foam-supported WS2nanosheets for cable-shaped flexible sodium ion batteries

Abstract: NGQDs-WS2/3DCF three-dimensional nanoarchitecture was designed and synthesized as a high-performance flexible and free-standing anode electrode for cable-shaped sodium-ion batteries.

Cited by 119 publications

References 72 publications

Explicating the Sodium Storage Kinetics and Redox Mechanism of Highly Pseudocapacitive Binary Transition Metal Sulfide via Operando Techniques and Ab Initio Evaluation

Explicating the Sodium Storage Kinetics and Redox Mechanism of Highly Pseudocapacitive Binary Transition Metal Sulfide via Operando Techniques and Ab Initio Evaluation

Boosting Sodium Storage of Fe1−xS/MoS2 Composite via Heterointerface Engineering

3D Hollow α‐MnO2 Framework as an Efficient Electrocatalyst for Lithium–Oxygen Batteries

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Product

Resources

About

3D carbon foam-supported WS₂nanosheets for cable-shaped flexible sodium ion batteries

3D Hollow α‐MnO₂ Framework as an Efficient Electrocatalyst for Lithium–Oxygen Batteries