Dual-phase MoS<sub>2</sub> as a high-performance sodium-ion battery anode

Wu, Junxiong; Liu, Jiapeng; Cui, Jiang; Yao, Shanshan; Ihsan‐Ul‐Haq, Muhammad; Mubarak, Nauman; Quattrocchi, Emanuele; Ciucci, Francesco; Kim, Jang Kyo

doi:10.1039/c9ta11913b

Cited by 167 publications

(121 citation statements)

References 72 publications

Supporting

Mentioning

119

Contrasting

Order By: Relevance

“…Theoretical Calculations: All spin-polarized DFT calculations were performed under the general gradient approximation using the Perdew-Burke-Ernzerhof functionals as implemented in the Vienna ab initio simulation package. [45][46][47][48] The core-electrons were treated with the projector augmented wave method. The kinetic cutoff for plane-waves was set at 450 eV.…”

Section: Methodsmentioning

confidence: 99%

Sodiophilically Graded Gold Coating on Carbon Skeletons for Highly Stable Sodium Metal Anodes

Zou

Ihsan‐Ul‐Haq

et al. 2020

Small

Self Cite

View full text Add to dashboard Cite

Metallic sodium (Na) is an appealing anode material for high‐energy Na batteries. However, Na metal suffers from low coulombic efficiencies and severe dendrite growth during plating/stripping cycles, causing short circuits. As an effective strategy to improve the deposition behavior of Na metal, a 3D carbon foam is developed that is sputter‐coated with gold nanoparticles (Au/CF), forming a functional gradient through its thickness. The highly porous Au/CF host is proven to have gradually varying sodiophilicity, which in turn facilitates initially preferential Na deposition on the gold‐rich, sodiophilic region in a “bottom‐up growth” mode, leading to uniform plating over the entire Au/CF host. This finding contrasts with dendrite formation in the pristine CF host, as proven by in situ microscopy. The Na‐predeposited Au/CF (Na@Au/CF) composite anode operates steadily for 1000 h at a low overpotential of ≈20 mV at 2 mA cm−2 in a symmetric cell. When the composite anode is coupled with a Na3V2(PO4)2F3 cathode, the full cell has a high capacity of 102.1 mAh g−1 after 500 cycles at 2 C. The sodiophilicity gradient design that is explored in this study offers new insight into developing porous Na metal hosts with highly stable plating/stripping performance for next‐generation Na batteries.

show abstract

Section: Methodsmentioning

confidence: 99%

Sodiophilically Graded Gold Coating on Carbon Skeletons for Highly Stable Sodium Metal Anodes

Zou

Ihsan‐Ul‐Haq

et al. 2020

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…6a) was smaller, indicating its lower charge-transfer resistance. This can be attributed to the 1-T phase existed in disordered structure of MoS 2 -MS [47,48]. Meanwhile, the slope of line at the low frequency related to the MoS 2 -MS-based anode was steeper than that of MoS 2 -MS-800-based one, also indicating that the MoS 2 -MS-based anode possessed a lower diffusion resistance due to the larger interlayer spacing and more defects, which facilitated the intercalation of Na ?…”

Section: Electrochemical Measurementsmentioning

confidence: 96%

Coral reef-like MoS2 microspheres with 1T/2H phase as high-performance anode material for sodium ion batteries

et al. 2020

View full text Add to dashboard Cite

Coral reef-like MoS 2 microspheres (MoS 2-MS) with 1T/2H phase is synthesized by a simple one-step hydrothermal method. It is found that this material has disordered structure, rich defects and large interlayer spacing. As it is used as the anode material for sodium ion batteries (SIBs), a stable specific capacity of 467 mA h g-1 at a current density of 100 mA g-1 after 100 cycles is delivered. Moreover, after 500-cycle test at 1 A g-1 , a highly stable specific capacity is still maintained at 412 mA h g-1. In addition, even at a high current density of 20 A g-1 , the MoS 2-MS electrode delivers a specific capacity of 100 mA h g-1. It is considered that the 1T/2H phase MoS 2-MS with a disordered structure can effectively enhance the electrical conductivity for the rate performance improvement, and furthermore, the rich defects provide more active sites for Na ? storage and the large interlayer spacing allows the rapid diffusion of the Na ? ions.

show abstract

“…As a first example, we used data taken from an MoS2-based battery. [55] The Nyquist plot of the EIS spectrum is shown in Figure 12 (a) with the corresponding admittance in Figure 12 (b). As shown in Figure 12 (c) and (d),…”

Section: Real Experimentsmentioning

confidence: 99%

A Bayesian view on the Hilbert transform and the Kramers-Kronig transform of electrochemical impedance data: Probabilistic estimates and quality scores

Liu

Wan

Ciucci

2020

Electrochimica Acta

Self Cite

View full text Add to dashboard Cite

Electrochemical impedance spectroscopy (EIS) is one of the most widely used experimental tools in electrochemistry and has applications ranging from energy storage and power generation to medicine. Considering the broad applicability of the EIS technique, it is critical to validate the EIS data against the Hilbert transform (HT) or, equivalently, the Kramers-Kronig relations. These mathematical relations allow one to assess the self-consistency of obtained spectra. However, the use of validation tests is still uncommon. In the present article, we aim at bridging this gap by reformulating the HT under a Bayesian framework. In particular, we developed the Bayesian Hilbert transform (BHT) method that interprets the HT probabilistic. Leveraging the BHT, we proposed several scores that provide quick metrics for the evaluation of the EIS data quality.

show abstract

Dual-phase MoS₂ as a high-performance sodium-ion battery anode

Abstract: A dual-phase MoS2 with expanded interlayer distance is fabricated for sodium storage. The dual-phase MoS2 shows significantly improved electrical conductivity and enhanced Na+ diffusivity compared to the common 2H-MoS2.

Cited by 167 publications

References 72 publications

Sodiophilically Graded Gold Coating on Carbon Skeletons for Highly Stable Sodium Metal Anodes

Sodiophilically Graded Gold Coating on Carbon Skeletons for Highly Stable Sodium Metal Anodes

Coral reef-like MoS2 microspheres with 1T/2H phase as high-performance anode material for sodium ion batteries

A Bayesian view on the Hilbert transform and the Kramers-Kronig transform of electrochemical impedance data: Probabilistic estimates and quality scores

Contact Info

Product

Resources

About

Dual-phase MoS2 as a high-performance sodium-ion battery anode

Abstract: A dual-phase MoS2 with expanded interlayer distance is fabricated for sodium storage. The dual-phase MoS2 shows significantly improved electrical conductivity and enhanced Na+ diffusivity compared to the common 2H-MoS2.

Cited by 167 publications

References 72 publications

Sodiophilically Graded Gold Coating on Carbon Skeletons for Highly Stable Sodium Metal Anodes

Sodiophilically Graded Gold Coating on Carbon Skeletons for Highly Stable Sodium Metal Anodes

Coral reef-like MoS2 microspheres with 1T/2H phase as high-performance anode material for sodium ion batteries

A Bayesian view on the Hilbert transform and the Kramers-Kronig transform of electrochemical impedance data: Probabilistic estimates and quality scores

Contact Info

Product

Resources

About

Dual-phase MoS₂ as a high-performance sodium-ion battery anode