Nanostructured Mo-based electrode materials for electrochemical energy storage

Hu, Xianluo; Zhang, Wei; Liu, Huan; Mei, Yueni; Huang, Yunhui

doi:10.1039/c4cs00350k

Cited by 625 publications

(350 citation statements)

References 408 publications

(409 reference statements)

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“…[ 43,44 ] Yet, their low conductivity limits the cycle-life and leads to poor rate performance. [ 45 ] This in turn encouraged us to explore the potential of the d -Mo 2 CT x free-standing "paper" as an electrode in supercapacitors and Li-ion batteries since: i) as noted above, Mo 2 CT x is a far better electrical conductor than Mo oxides and, ii) both materials have a similar surface chemistry; according to our XPS results, the surface of Mo 2 CT x is terminated with O and OH.…”

Section: Electrochemical Energy Storage Propertiesmentioning

confidence: 88%

Synthesis and Characterization of 2D Molybdenum Carbide (MXene)

Halim

Kota

Lukatskaya

et al. 2016

Adv Funct Materials

1,068

771

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Large scale synthesis and delamination of 2D Mo 2 CT x (where T is a surface termination group) has been achieved by selectively etching gallium from the recently discovered nanolaminated, ternary transition metal carbide Mo 2 Ga 2 C. Different synthesis and delamination routes result in different fl ake morphologies. The resistivity of free-standing Mo 2 CT x fi lms increases by an order of magnitude as the temperature is reduced from 300 to 10 K, suggesting semiconductor-like behavior of this MXene, in contrast to Ti 3 C 2 T x which exhibits metallic behavior. At 10 K, the magnetoresistance is positive. Additionally, changes in electronic transport are observed upon annealing of the fi lms. When 2 µm thick fi lms are tested as electrodes in supercapacitors, capacitances as high as 700 F cm −3 in a 1 M sulfuric acid electrolyte and high capacity retention for at least 10,000 cycles at 10 A g −1 are obtained.Free-standing Mo 2 CT x fi lms, with ≈8 wt% carbon nanotubes, perform well when tested as an electrode material for Li-ions, especially at high rates. At 20 and 131 C cycling rates, stable reversible capacities of 250 and 76 mAh g −1 , respectively, are achieved for over 1000 cycles.

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Section: Electrochemical Energy Storage Propertiesmentioning

confidence: 88%

Synthesis and Characterization of 2D Molybdenum Carbide (MXene)

Halim

Kota

Lukatskaya

et al. 2016

Adv Funct Materials

1,068

771

View full text Add to dashboard Cite

show abstract

“…More extensive discussion of the various methods used to synthesize MoS 2 has been reviewed. [ 29,[45][46][47] Even though nanoparticle-based materials are advantageous for their short ion-diffusion path lengths, they do not usually form ideal electrode architectures with carbon and binders. Inhomogeneous nanoparticle agglomerates tend to form, which are diffi cult to disperse in a conductive additive and result in resistive interparticle electrical contact, leading to poor electronic conduction.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous MoS₂ as a Transition Metal Dichalcogenide Exhibiting Pseudocapacitive Li and Na‐Ion Charge Storage

Cook

Kim

Yan

et al. 2016

Advanced Energy Materials

419

274

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The ion insertion properties of MoS2 continue to be of widespread interest for energy storage. While much of the current work on MoS2 has been focused on the high capacity four‐electron reduction reaction, this process is prone to poor reversibility. Traditional ion intercalation reactions are highlighted and it is demonstrated that ordered mesoporous thin films of MoS2 can be utilized as a pseudocapacitive energy storage material with a specific capacity of 173 mAh g−1 for Li‐ions and 118 mAh g−1 for Na‐ions at 1 mV s−1. Utilizing synchrotron grazing incidence X‐ray diffraction techniques, fast electrochemical kinetics are correlated with the ordered porous structure and with an iso‐oriented crystal structure. When Li‐ions are utilized, the material can be charged and discharged in 20 seconds while still achieving a specific capacity of 140 mAh g−1. Moreover, the nanoscale architecture of mesoporous MoS2 retains this level of lithium capacity for 10 000 cycles. A detailed electrochemical kinetic analysis indicates that energy storage for both ions in MoS2 is due to a pseudocapacitive mechanism.

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“…The research is now focused on finding suitable electrode materials with a good electrochemical performance for magnesium ion batteries (MIBs) in order to achieve high energy capacity and safety rechargeable ion batteries for electric vehicles [4][5][6][7][8][9][10][11]. Oxides with a spinel structure such as spinel-type Mn 2 O 4 are widely used as cathode materials for lithium ion batteries (LIBs) [12,13].…”

Section: Introductionmentioning

confidence: 99%