Hybrid energy storage mechanisms for sulfur-decorated Ti3C2 MXene anode material for high-rate and long-life sodium-ion batteries

Sun, Shuijing; Xie, Zhen‐Lang; Yan, Yurong; Wu, Songping

doi:10.1016/j.cej.2019.01.185

Cited by 147 publications

(81 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the R CT value affects the Ti 3 C 2 T x _HF high kinetic, in full agreement with the intrinsic internal disorder of the phase. Diffusion coefficients values are comparable to previously reported data [51,52] and are also function of the SOC, reaching a maximum value for the intermediate sodiation stage. The comparison of the D values for the different samples shows that Ti 3 C 2 T x _HF high_600 has the lowest diffusion coefficient at all the SOC, as the result of impurities formation due to the material degradation.…”

Section: Resultssupporting

confidence: 90%

Enhanced Functional Properties of Ti₃C₂T_x MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

et al. 2020

View full text Add to dashboard Cite

The large implementation of electrochemical energy storage devices requires the development of new chemistries tailored for specific uses. Sodium‐ion batteries (SIBs) can cover different application fields, however the state‐of‐the‐art negative material, hard carbon, suffers from poor cyclability and rate capability. MXenes are a vast class of 2D‐materials of the general formula Mn+1XnTx (M = transition metal, X = C or N, and T = M‐terminating group) with peculiar structural features able to reversible intercalate chemical species, such as alkaline cations. The MXene compound Ti3C2Tx is one of the most investigated, thanks to the easy preparation route by etching of the pristine compound Ti3AlC2. In this work, the effect of the etching conditions and of the postsynthesis thermal treatments on the chemical, morphological, and structural properties of Ti3C2Tx are investigated, and in turn the correlation between its features and the functional properties as negative materials in SIBs are studied. The Ti3C2Tx obtained in high hydrofluoric concentration and after a 300 °C thermal treatment shows 110 mAh g−1 at 30 mA g−1 with an average potential of 1.33 V versus Na+/Na, 100% and good rate capability, since it is still able to deliver 73 mAh g−1 at 1500 mA g−1.

show abstract

Section: Resultssupporting

confidence: 90%

Enhanced Functional Properties of Ti₃C₂T_x MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

et al. 2020

View full text Add to dashboard Cite

show abstract

“…[ 23 ] The excellent electrochemical properties of MXenes make them widely applicable for electromagnetic interference shielding, [ 24–25 ] photodegradation, [ 26 ] photovoltaics, [ 27–28 ] electrochemical catalysis, [ 29 ] supercapacitors, and lithium ion batteries. [ 30–32 ] MXenes are prepared from MAX phases by etching the A layer (usually Al or Si) with a strong acid solution such as HF or LiF/HCl. [ 33 ] The general formula of MXenes is M n +1 X n T x ( n = 1–3), where M represents an early transition metal such as Ti, V, Nb, Ta, or Mo, X is C and/or N, and T x represents a surface terminating group such as O, F, and OH.…”

Section: Introductionmentioning

confidence: 99%

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂T_x MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

Chen

Sun

et al. 2020

Adv Materials Inter

View full text Add to dashboard Cite

such as global warming and climate changes. [1][2][3][4] Solar energy is clean and abundant, for example, nearly four million exajoules (4 × 10 18 J) of solar energy reaches the earth annually. [1,5] Conversion of solar energy into chemical energy through photocatalytic decomposition of water to produce hydrogen is one of the suitable approaches to utilize solar energy. [6][7][8][9][10] The different types of fundamental photocatalytic reactions include i) semiconductor-based photocatalysis, ii) dye-sensitized semiconductor-based photo catalysis, iii) quantum dot-based photocatalysis, iv) 2D layered materials-based photocatalysts, and v) plasmonic photocatalysts. [11] Photocatalytic hydrogen evolution reaction (HER) are mainly based on inorganic semiconductor and poly merbased organic semiconductors, for exampl, in a conventional dye-sensitized semiconductor photocatalytic hydrogen production system, the dye molecules are excited to inject electrons into the conduction band of a semiconductor or polymer (inorganic semiconductor TiO 2 or g-C 3 N 4 is usually chosen), then the electrons are quickly captured by the co-catalyst (such as precious metals Efficient photocatalytic hydrogen evolution reaction (HER) in the visibleto-near infrared region at a low cost remains a challenging issue. This work demonstrates the fabrication of organic-inorganic composites by deposition of supramolecular aggregates of a chlorophyll derivative, namely, zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide a (Chl) on the surface of Ti 3 C 2 T x MXene with 2D accordion-like morphology. This composite material isemployed as noble metal-free catalyst in photocatalytic HER under the white light illumination, where Chl serves as a small molecule organic semiconductor component instead of ordinary inorganic and polymer organic semiconductors such as TiO 2 and g-C 3 N 4 , and Ti 3 C 2 T x serves as a co-catalyst. Different composition ratios of Chl/Ti 3 C 2 T x are compared for their light-harvesting ability, morphology, charge transfer efficiency, and photocatalytic performance. The best HER performance is found to be as high as 52 ± 5 µmol h −1 g cat −1 after optimization. Such a large HER activity is attributed to the efficient light harvesting followed by exciton transfer in Chl aggregates and the resultant charge separation at the interface of Chl/Ti 3 C 2 T x .

show abstract

“…Simultaneously, a high reversible capacity of 130 mA h g −1 was also received at a large current density of 0.5 A g −1 at the 150th cycle ( Figure S4 ), i. e., a remarkable volume capacity of 390 mA h cm −3 based on the tap density of active materials ( SI ). Such a performance is significantly better than that other MXenes in previous literature, such as a reversible capacity of 101 mA h g −1 at 100 mA g −1 after 100 cycles for alkalized Ti 3 C 2 T x , Ti 3 C 2 T x flakes delivered a capacity of 120 mA h g −1 after 500 cycles for SIBs (at 100 mA g −1 ), V 2 CT x rendered a reversible capacity of 125 mA h g −1 after 100 cycles (at 10 C) ( Figure S5 and Table S2 ). It was also comparable with those for Ti 3 C 2 T x , V 2 CT x , and Mo 2 CT x macroporous MXene films …”

Section: Resultsmentioning

confidence: 64%

“…The irreversible reaction could be considered as result of the formation of solid electrolyte interphase (SEI) resulting from the electrolyte decomposition or side reactions of Na + with the surface groups or water molecules in the as‐made MXene . During the first anodic process, the appearance of a distinct peak at ∼0.1 V could be ascribed to the extraction of sodium ions from the MXene matrix . More importantly, a pair of reduction/oxidation peaks situated at ∼2.35/2.66 V could be assigned to the existence of a little Nb 2 O 5 in exterior layer of the MXene.…”

Section: Resultsmentioning

confidence: 99%

“…A large family of layered 2D transition metal carbides/nitrides (MXenes) has been attracting much renewed attention since their discovery in 2011 . Among them, Ti‐based MXenes, e. g ., pristine Ti 3 C 2 T x and Ti 2 CT x MXene, were most widely studied as energy storage materials, such as the pristine Ti 3 C 2 T x and alkalized Ti 3 C 2 T x rendered reversible capacities of ∼90 mA h g −1 and ∼101 mA h g −1 at 100 mA g −1 for SIBs, respectively . Further, 3D Ti 3 C 2 T x MXene film delivered a long‐term reveriable capacity of 210 mA h g −1 at 2 C after 1000 cycles for SIBs .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hybrid Charge‐Storage Route to Nb₂CT_xMXene as Anode for Sodium‐Ion Batteries

Duan

Xia

et al. 2020

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

A facile hydrothermal approach has been successfully adopted to synthesize two-dimensional Nb 2 CT x MXene, targeting sodium storage approach in two-dimensional MXene. As an anode material for sodium-ion batteries (SIBs), as-prepared Nb 2 CT x MXene delivered a stable electrochemical performance of ∼ 102 mA h g À 1 after 500 cycles at a current density of 1.0 A g À 1 . Further, the full cell comprising of Na 3 V 2 (PO 4 ) 3 @C cathode and Nb 2 CT x MXene anode also rendered a reversible capacity of 181 mA h g À 1 at a current density of 100 mA g À 1 after 50 cycles. The good sodium storage could be ascribed to the contribution of hybrid pseudocapacitance, effectively promoted charge storage, unique layered structure and expedited dynamic diffusion of ions. Accordingly, these facts enabled the Nb 2 CT x MXene to be a promising candidate as an anode material for sodium-ion batteries. Results and DiscussionHere, a facile hydrothermal route was chosen to synthesize Nb 2 CT x MXene, with an advantage of environmentally friendly and efficient stripping. In addtion, it was conducive to the generation of high valence of Nb. X-ray diffraction (XRD) profiles of Nb 2 AlC before and after HF etching were showed in [a] Dr.

show abstract

Hybrid energy storage mechanisms for sulfur-decorated Ti3C2 MXene anode material for high-rate and long-life sodium-ion batteries

Cited by 147 publications

References 48 publications

Enhanced Functional Properties of Ti₃C₂T_x MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

Enhanced Functional Properties of Ti₃C₂T_x MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂T_x MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

Hybrid Charge‐Storage Route to Nb₂CT_xMXene as Anode for Sodium‐Ion Batteries

Contact Info

Product

Resources

About

Hybrid energy storage mechanisms for sulfur-decorated Ti3C2 MXene anode material for high-rate and long-life sodium-ion batteries

Cited by 147 publications

References 48 publications

Enhanced Functional Properties of Ti3C2Tx MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

Enhanced Functional Properties of Ti3C2Tx MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti3C2Tx MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

Hybrid Charge‐Storage Route to Nb2CTxMXene as Anode for Sodium‐Ion Batteries

Contact Info

Product

Resources

About

Enhanced Functional Properties of Ti₃C₂T_x MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

Enhanced Functional Properties of Ti₃C₂T_x MXenes as Negative Electrodes in Sodium‐Ion Batteries by Chemical Tuning

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂T_x MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

Hybrid Charge‐Storage Route to Nb₂CT_xMXene as Anode for Sodium‐Ion Batteries