Electrochemical Lithium Storage Performance of Molten Salt Derived V2SnC MAX Phase

Li, Youbing; Ma, Guoliang; Shao, Hui; Xiao, Pei; Lu, Jun; Xu, Jin; Hou, Jue; Chen, Ke; Zhang, Xiao; Li, Mian; Persson, Per O. Å.; Hultman, Lars; Eklund, Per; Du, Shiyu; Chai, Zhifang; Huang, Zhengren; Jin, Na; Ma, Jiwei; Liu, Ying; Lin, Zhenxu; Huang, Qing

doi:10.1007/s40820-021-00684-6

Cited by 30 publications

(32 citation statements)

References 31 publications

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“…Several conductive matrixes including graphene [5,6,16], porous carbon [17,20,21], and carbon nanotubes [22] were adopted to combine with ZnS for improving electrochemical performance. MXenes, a new family of the 2D materials, have already been proved to be promising candidate as electrode materials for electrochemical energy storage devices [23][24][25][26][27][28][29][30][31], such as LIBs and supercapacitors. Among the large family of MXenes, Ti 3 C 2 T x [32] is the most widely studied one for electrochemical energy storage owing to its high electronic conductivity (up to 2.4 × 10 4 S cm −1 ) [33], hydrophilic surfaces and high density [34].…”

Section: Introductionmentioning

confidence: 99%

MOF-Derived ZnS Nanodots/Ti3C2Tx MXene Hybrids Boosting Superior Lithium Storage Performance

et al. 2021

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ZnS has great potentials as an anode for lithium storage because of its high theoretical capacity and resource abundance; however, the large volume expansion accompanied with structural collapse and low conductivity of ZnS cause severe capacity fading and inferior rate capability during lithium storage. Herein, 0D-2D ZnS nanodots/Ti3C2Tx MXene hybrids are prepared by anchoring ZnS nanodots on Ti3C2Tx MXene nanosheets through coordination modulation between MXene and MOF precursor (ZIF-8) followed with sulfidation. The MXene substrate coupled with the ZnS nanodots can synergistically accommodate volume variation of ZnS over charge–discharge to realize stable cyclability. As revealed by XPS characterizations and DFT calculations, the strong interfacial interaction between ZnS nanodots and MXene nanosheets can boost fast electron/lithium-ion transfer to achieve excellent electrochemical activity and kinetics for lithium storage. Thereby, the as-prepared ZnS nanodots/MXene hybrid exhibits a high capacity of 726.8 mAh g−1 at 30 mA g−1, superior cyclic stability (462.8 mAh g−1 after 1000 cycles at 0.5 A g−1), and excellent rate performance. The present results provide new insights into the understanding of the lithium storage mechanism of ZnS and the revealing of the effects of interfacial interaction on lithium storage performance enhancement.

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Section: Introductionmentioning

confidence: 99%

MOF-Derived ZnS Nanodots/Ti3C2Tx MXene Hybrids Boosting Superior Lithium Storage Performance

et al. 2021

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“…Meanwhile, fo TSAC, these redox peaks are not obvious because there are less exposed Si atoms i TSAC particles. This alloying procedure of exposed "A" layer of MAX phases is also in those Sn-containing MAX phases, such as Ti2SnC, Nb2SnC and V2SnC [7][8][9]. In ad the differences in the CV profiles between these initial two cycles and the similarity second and the third cycles indicates that the irreversible capacity losses of nanosheets and bulk TSAC mainly take place in the first cycle.…”

Section: Resultsmentioning

confidence: 83%

“…Through Figures 6 and 7, compared with bulk TSAC, TSAC nanosheets exhibited enhanced electrochemical properties as anode materials for LIB. According to the studies of lithium-ion uptake of other MAX phases, both MX and A layers show a possible redox reaction capability with lithium-ion [7][8][9]. In addition, after etching A layer from MAX phases, the resulting MXenes also show promising lithium-ion storage ability [44,[46][47][48] Compared to bulk TSAC, TSAC nanosheets can provide larger active surface area and more exposed Si atoms to promote the redox reactions of Ti3C2-Li and Si-Li; thus, the spe cific capacity of TSAC nanosheets is superior to that of bulk TSAC.…”

Section: Resultsmentioning

confidence: 99%

“…For example, due to their inherent layered structure with alternately arranged MX and A layers, the MAX phases display a superior resistance to oxidation, thermal energy and corrosion, very good electrical conductivity, high strength and elastic modulus and excellent machinability [2][3][4][5][6]. Owing to their lamellar structure and excellent conductivity, MAX phases show great potential in lithium-ions storage for a Li-ion battery (LIB) or capacitor [7][8][9][10][11][12][13][14]. However, the reported capacities of MAX phases are relatively low, particularly in the initial few charge-discharge cycles, which may restrict their real application in LIB.…”

Section: Introductionmentioning

confidence: 99%

“…Herein, we extend the application of these TSAC nanosheets to the electrode for LIBs because the size and morphology of MAX phases promise improvements on their electrochemical performance for LIBs [9][10][11]. The Ti 3 Si 0.75 Al 0.25 C 2 nanosheets have very thin thickness, so it can be expected that Li ions can easily be intercalated into the TSAC nanosheets layers.…”

Section: Introductionmentioning

confidence: 99%

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Ti3Si0.75Al0.25C2 Nanosheets as Promising Anode Material for Li-Ion Batteries

Wang

et al. 2021

Nanomaterials

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Herein we report that novel two-dimensional (2D) Ti3Si0.75Al0.25C2 (TSAC) nanosheets, obtained by sonically exfoliating their bulk counterpart in alcohol, performs promising electrochemical activities in a reversible lithiation and delithiation procedure. The as-exfoliated 2D TSAC nanosheets show significantly enhanced lithium-ion uptake capability in comparison with their bulk counterpart, with a high capacity of ≈350 mAh g−1 at 200 mA g−1, high cycling stability and excellent rate performance (150 mAh g−1 after 200 cycles at 8000 mA g−1). The enhanced electrochemical performance of TSAC nanosheets is mainly a result of their fast Li-ion transport, large surface area and small charge transfer resistance. The discovery in this work highlights the uniqueness of a family of 2D layered MAX materials, such as Ti3GeC2, Ti3SnC2 and Ti2SC, which will likely be the promising choices as anode materials for lithium-ion batteries (LIBs).

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Constructing Flexible Film Electrode with Porous Layered Structure by MXene/SWCNTs/PANI Ternary Composite for Efficient Low‐Grade Thermal Energy Harvest

Wei

et al. 2023

Adv Funct Materials

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Thermal energy, constituting the majority of the energy lost through various inefficiencies, is abundant and ubiquitous. With thermogalvanic effect, thermocells (TECs) can directly convert thermal energy into electricity without producing vibration, noise or other waste emissions. This work presents a rational design of flexible film electrodes constructed on a ternary composite of Ti 3 C 2 T x MXene (T x represents surface terminations), polyaniline (PANI) and single-wall carbon nanotubes for TECs, which exhibit notably enhanced thermoelectrochemical performance compared to the widely adopted noble platinum electrodes. The ternary composite electrodes form a porous layered structure with a large electrochemical-active surface area. Experiment and simulation results reveal that synergistic effects of Ti 3 C 2 T x and PANI are induced for promoting both mass and charge transport at the electrolyteelectrode interface, resulting in a TEC with an output power of 13.15 µW cm −2 at the ΔT of 40 K. The TEC also shows a rapid response to the small temperature difference between the human body and the ambient, demonstrating high potential in harvesting low-grade heat to power small electronics.

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Electrochemical Lithium Storage Performance of Molten Salt Derived V2SnC MAX Phase

Cited by 30 publications

References 31 publications

MOF-Derived ZnS Nanodots/Ti3C2Tx MXene Hybrids Boosting Superior Lithium Storage Performance

MOF-Derived ZnS Nanodots/Ti3C2Tx MXene Hybrids Boosting Superior Lithium Storage Performance

Ti3Si0.75Al0.25C2 Nanosheets as Promising Anode Material for Li-Ion Batteries

Constructing Flexible Film Electrode with Porous Layered Structure by MXene/SWCNTs/PANI Ternary Composite for Efficient Low‐Grade Thermal Energy Harvest

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