Oxygen vacancies-enriched sub-7 nm cross-linked Bi2.88Fe5O12- nanoparticles anchored MXene for electrochemical energy storage with high volumetric performances

Niu, Hao; Qing-hua, Yang; Wang, Qian; Jing, Xiaoyan; Zhu, Kai; Ye, Ke; Wang, Guiling; Cao, Dianxue; Yan, Jun

doi:10.1016/j.nanoen.2020.105360

Cited by 29 publications

(13 citation statements)

References 42 publications

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“…In addition, the CV curves of the MRC‐30 aerogel can still maintain the congruous shape with no distinct shape variation after 10 000, 50 000, and 100 000 cycles (inset of Figure 5J), also confirming the excellent cycling stability of the MRC‐30 aerogel. The cycling performance is greatly comparable with and even surpasses the previously announced MXene materials, such as Ti 3 C 2 film (20 000, 81.7%), [ 33 ] MXene (10 000, 90.0%), [ 42 ] MXene/BFO (10 000, 89.3%), [ 43 ] MXene hydrogel (10 000, 97.1%), [ 20 ] PPy/Ti 3 C 2 T x (25 000, 92.0%), [ 44 ] and MXene/BC‐5 (10 000, 96.5%). [ 45 ]…”

Section: Resultssupporting

confidence: 53%

3D Macroporous Oxidation‐Resistant Ti₃C₂T_x MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

Yang

Yao

Wang

et al. 2021

Adv Funct Materials

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101

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As a recently emerging group of 2D materials, MXene has attracted extensive attention in the energy storage field in recent years owing to their outstanding features. However, the notorious issues of inevitable oxidation stability and surface‐to‐surface self‐restacking for MXene significantly prevent its further wide‐ranging application. Herein, the 3D macroporous oxidation‐resistant Ti3C2Tx MXene/graphene/carbon nanotube (MRC) hybrid hydrogels are prepared by a simple gelation method assisted by l‐cysteine as crosslinker and l‐ascorbic acid (VC) as reductant. Benefitting from the effectively alleviated restacking, excellent electrical conductivity, and the 3D inter‐crosslinked macroporous architecture, as a supercapacitor electrode, the obtained MRC aerogel exhibits a superior specific capacitance of 349 F g−1, unparalleled rate capability (52.0% at 3000 mV s−1) and amazing cyclic stability (retention of 97.1% after 100 000 cycles). Moreover, the 3D MRC‐30 aerogel exhibits an impressive oxidation‐resistant performance with just a 9.3% increase in electrical resistance after storing in ambient condition for 60 days, effectively alleviating the oxidation problem of MXene. This work demonstrates a new method for construction of 3D oxidation‐resistant MXene hydrogel, shedding new light on the promising applications of MXene materials, especially in high humidity and oxygen environment.

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Section: Resultssupporting

confidence: 53%

3D Macroporous Oxidation‐Resistant Ti₃C₂T_x MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

Yang

Yao

Wang

et al. 2021

Adv Funct Materials

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101

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“…By increasing the current density from 0.1 to 4.0 A g −1 , no obvious plateaus are observed in these curves, indicating the excellent rate capability. The specific capacity is 627, 512, 433, 371, 309, and 244 mA h g −1 at current densities of 0.1, 0.2, 0.5, 1.0, 2.0, and 4.0 A g −1 , corresponding to volumetric specific capacity of 934, 763, 645, 553, 460, and 363 mA h cm −3 , respectively, superior to other results reported elsewhere (Table S1) [36][37][38][39][40][41][42][43][44][45]. Then, the rate performance of the VM POMs/MXenes is shown in Fig.…”

Section: Resultscontrasting

confidence: 50%

MXene-mediated regulation of local electric field surrounding polyoxometalate nanoparticles for improved lithium storage

Chao

et al. 2022

Sci. China Mater.

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Due to their capability of reversibly accepting multi lithium ions, polyoxometalates (POMs) have been widely regarded as promising candidates for electrochemical lithium storage. Nevertheless, the insulating nature of POMs hinders fast migration kinetics of lithium within the bulk of these materials. Herein, we propose the introduction of a local electric field surrounding the POM nanoparticles consisting of Mn and V where the concomitant Coulomb forces can accelerate the migration of lithium ions. After rationally hybridizing POMs with MXene nanosheets, the imbalanced charge distribution emerging at their interface produces the local electric field, thereby leading to a 250-fold increase of lithium diffusion coefficient. In this regard, a capacitive contribution as high as 81.7% at 1.0 mV s −1 is observed. Moreover, the POM nanoparticles could densely assemble on the surface of MXene nanosheets, offering highly packed electrodes and thus high volumetric capacities. Due to the improved lithiumion transfer kinetics, the POMs/MXenes composites are paired with activated carbon to produce lithium-ion capacitors which could offer a high energy density of 195.5 W h kg −1 and a large power capability of 3800 W kg −1 . The findings in this work could build a clear relationship between materials with different conductivities for designing electrode materials.

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“…Ni 2p core-level XPS spectrum could be fitted with two pairs of Ni 2p 1/2 /2p 3/2 spin–orbit doublets at 875.9/858.0 and 872.7/854.9 eV, corresponding to the Ni 2p 1/2 /Ni 2p 3/2 of Ni 2+ and Ni 3+ (Figure C) . With regard to the Co 2p spectrum, it could also be deconvoluted into two spin–orbit doublets at 797.3/781.3 and 803.4/786.8 eV, attributed to the 2p 3/2 /2p 1/2 of Co 3+ and Co 2+ (Figure D). − For the S 2p XPS spectrum (Figure E), it could be fitted with three peaks located at 161.2, 163.3, and 168.0 eV, which could be assigned to S 2p 3/2 , S 2p 1/2 , and SO due to sulfur oxidation in air. , High-resolution XPS spectrum of C 1s could be fitted by four peaks at 288.5, 286.0, 284.6, and 281.2 eV, , which belong to COO/C–F, C–O, C–C, and C–Ti bonds, respectively (Figure S10). High-resolution Ti 2p (Figure F) could be fitted with three spin–orbit doublets such as Ti–C (461.6 and 455.5 eV), Ti 2+ (463.8 and 457.7 eV), and TiO 2 (465.6 and 460.5 eV) .…”

Section: Results and Discussionmentioning

confidence: 98%

“…41−44 For the S 2p XPS spectrum (Figure 3E), it could be fitted with three peaks located at 161.2, 163.3, and 168.0 eV, 45 which could be assigned to S 2p 3/2 , S 2p 1/2 , and SO due to sulfur oxidation in air. 41,46 High-resolution XPS spectrum of C 1s could be fitted by four peaks at 288.5, 286.0, 284.6, and 281.2 eV, 47,48 which belong to COO/C−F, C−O, C−C, and C−Ti bonds, respectively (Figure S10). High-resolution Ti 2p (Figure 3F) could be fitted with three spin−orbit doublets such as Ti−C (461.6 and 455.5 eV), Ti 2+ (463.8 and 457.7 eV), and TiO 2 (465.6 and 460.5 eV).…”

Section: Resultsmentioning

confidence: 99%

Versatile Interfacial Self-Assembly of Ti₃C₂T_x MXene Based Composites with Enhanced Kinetics for Superior Lithium and Sodium Storage

et al. 2021

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Exploring nanostructured transition-metal sulfide anode materials with excellent electrical conductivity is the key point for high-performance alkali metal ion storage devices. Herein, we propose a powerful bottom-up strategy for the construction of a series of sandwich-structured materials by a rapid interfacial self-assembly approach. Oleylamine could act as a functional reagent to guarantee that the nanomaterials self-assemble with MXene. Benefiting from the small size of Co-NiS nanorods, excellent conductivity of MXene, and sandwiched structure of the composite, the Co-NiS/MXene composite could deliver a high discharge capacity of 911 mAh g–1 at 0.1 A g–1 for lithium-ion storage. After 200 cycles at 0.1 A g–1, a high specific capacity of 1120 mAh g–1 could be still remaining, indicating excellent cycling stability. For sodium-ion storage, the composite exhibits high specific capacity of 541 mAh g–1 at 0.1 A g–1 and excellent rate capability (263 mAh g–1 at 5 A g–1). This work offers a straightforward strategy to design and construct MXene-based anode nanomaterials with sandwiched structure for high-performance alkali metal ion storage and even in other fields.

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Oxygen vacancies-enriched sub-7 nm cross-linked Bi2.88Fe5O12- nanoparticles anchored MXene for electrochemical energy storage with high volumetric performances

Cited by 29 publications

References 42 publications

3D Macroporous Oxidation‐Resistant Ti₃C₂T_x MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

3D Macroporous Oxidation‐Resistant Ti₃C₂T_x MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

MXene-mediated regulation of local electric field surrounding polyoxometalate nanoparticles for improved lithium storage

Versatile Interfacial Self-Assembly of Ti₃C₂T_x MXene Based Composites with Enhanced Kinetics for Superior Lithium and Sodium Storage

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Oxygen vacancies-enriched sub-7 nm cross-linked Bi2.88Fe5O12- nanoparticles anchored MXene for electrochemical energy storage with high volumetric performances

Cited by 29 publications

References 42 publications

3D Macroporous Oxidation‐Resistant Ti3C2Tx MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

3D Macroporous Oxidation‐Resistant Ti3C2Tx MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

MXene-mediated regulation of local electric field surrounding polyoxometalate nanoparticles for improved lithium storage

Versatile Interfacial Self-Assembly of Ti3C2Tx MXene Based Composites with Enhanced Kinetics for Superior Lithium and Sodium Storage

Contact Info

Product

Resources

About

3D Macroporous Oxidation‐Resistant Ti₃C₂T_x MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

3D Macroporous Oxidation‐Resistant Ti₃C₂T_x MXene Hybrid Hydrogels for Enhanced Supercapacitive Performances with Ultralong Cycle Life

Versatile Interfacial Self-Assembly of Ti₃C₂T_x MXene Based Composites with Enhanced Kinetics for Superior Lithium and Sodium Storage