Phase-transformation engineering in MoS 2 on carbon cloth as flexible binder-free anode for enhancing lithium storage

Wang, Tailin; Sun, Changlong; Yang, Mingzhi; Zhao, Gang; Wang, Shouzhi; Ma, Fukun; Zhang, Lei; Shao, Yongliang; Wu, Yongzhong; Huang, Baibiao

doi:10.1016/j.jallcom.2017.05.071

Cited by 73 publications

(57 citation statements)

References 56 publications

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“…Figure 5 a shows the CV curves of 1st, 2nd, and 5th cycles of metallic MoS 2 nanotube and the 1st CV cycle of 2H MoS 2 (black curve). The first discharge of the 2H MoS 2 exhibits two peaks at 0.94 and 0.4 V. In detail, the peak at 0.94 V is attributed to the intercalation of lithium‐ion into the 2H MoS 2 layer, forming Li x MoS 2 , with the phase transformation of trigonal prisms (2H) to octahedral (1T or 1T′) structure . The peak at 0.4 V is ascribed to the conversion from Li x MoS 2 to Li 2 S and Mo nanoparticles .…”

Section: Resultsmentioning

confidence: 99%

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS₂ for High Rate Lithium‐Ion Batteries

Jiao

Mukhopadhyay

et al. 2018

Advanced Energy Materials

193

188

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by the large volume change and the poor intrinsic conductivity with a direct bandgap of ≈1.9 eV significantly inhibits the further applications of 2H MoS 2 on lithium-ion batteries. [8,9] One of the best and typical strategies to ameliorate the structural stability and electrical conductivity of MoS 2 based anode is to fabricate hybrid 2H MoS 2 nanocomposites with conductive carbonaceous materials, such as carbon fibers, graphene, and carbon nanotubes. These hybrid MoS 2 -carbon nano composites (MCNs) could deliver a decent capacity of ≈900 mA h g −1 at 1 A g −1 current density on lithium-ion batteries for 100 cycles. [2,10,11] Unfortunately, this strategy also induces new constraints to the MCNs' applications on lithium-ion batteries, such as reducing the mass loading of MoS 2 , consuming more electrolytes, raising the electrode cost, and increasing the reaction barrier between lithium-ion and MoS 2 . [12] Even though carbon source can improve the conductivity of the electrode, the intrinsic insulating property of 2H MoS 2 remains unchanged, which will significantly limit its rate performance and impede the utilization of the active MoS 2 . Recently, the metastable metallic phase (1T or 1T′) MoS 2 has emerged with promising potential on lithium-ion storage field. As reported, [8,[13][14][15] benefited from its different Mo and S atom coordination of octahedral structure with dense intercalation sites, metallic phase MoS 2 owns five orders of magnitude higher electrical conductivity than that of 2H MoS 2 . This high intrinsic conductivity will be beneficial for the performance of metallic MoS 2 electrode in the following two aspects. On one hand, pure metallic MoS 2 can be directly applied as an anode electrode on lithium-ion batteries without adding any conductive carbon sources, which would facilitate the electrochemical storage fundamental mechanism studying of metallic MoS 2 . On the other hand, the utilization of active MoS 2 can also be maximized, and the lithium-ion charge/discharge capacity could be tremendously enhanced at high current density, therefore intensely improves the rate performance as well as the reversible capacity of metallic MoS 2 as an anode electrode. However, the conventional preparation methods of metallic MoS 2 by alkali metal intercalation and exfoliation are complicated, unstable, and dangerous. [13] Recent reports provided several new strategies to prepare metallic MoS 2 by solvothermal method, [9,16,17] which stabilized the metallic MoS 2 by interlayer Metallic phase molybdenum disulfide (MoS 2 ) is well known for orders of magnitude higher conductivity than 2H semiconducting phase MoS 2 . Herein, for the first time, the authors design and fabricate a novel porous nanotube assembled with vertically aligned metallic MoS 2 nanosheets by using the scalable solvothermal method. This metallic nanotube has the following advantages: (i) intrinsic high electrical conductivity that promotes the rate performance of battery and eliminates the using of conductive additive; (ii) hierarchical, ...

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Section: Resultsmentioning

confidence: 99%

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS₂ for High Rate Lithium‐Ion Batteries

Jiao

Mukhopadhyay

et al. 2018

Advanced Energy Materials

193

188

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“…Compared with the high‐resolution XPS of MXene/2H MoS 2 ‐C (Figure S9, Supporting Information), the most notable difference in Figure c for MXene/1T‐2H MoS 2 ‐C is that the peaks of S 2p 3/2 and S 2p 1/2 at around 162.2 and 163.4 eV move to the lower energy direction. For N 1s spectra of MXene/1T‐2H MoS 2 ‐C (Figure d), three main peaks located at around 398.6, 400.7, and 401.7 eV, assigned to CN (pyridinic‐N), CN (pyrrolic‐N)) and NMo bonds, respectively. The primary doped species (pyridinic‐N, pyrrolic‐N) enable this carbon matrix to suppress the diffusion of polysulfides .…”

Section: Resultsmentioning

confidence: 99%

Rational Design of MXene/1T‐2H MoS₂‐C Nanohybrids for High‐Performance Lithium–Sulfur Batteries

Zhang

Yang

et al. 2018

Adv Funct Materials

336

214

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Despite high-energy density and low cost of the lithium-sulfur (Li-S) batteries, their commercial success is greatly impeded by their severe capacity decay during long-term cycling caused by polysulfide shuttling. Herein, a new phase engineering strategy is demonstrated for making MXene/1T-2H MoS 2 -C nanohybrids for boosting the performance of Li-S batteries in terms of capacity, rate ability, and stability. It is found that the plentiful positively charged S-vacancy defects created on MXene/1T-2H MoS 2 -C, proved by high-resolution transmission electron microscopy and electron paramagnetic resonance, can serve as strong adsorption and activation sites for polar polysulfide intermediates, accelerate redox reactions, and prevent the dissolution of polysulfides. As a consequence, the novel MXene/1T-2H MoS 2 -C-S cathode delivers a high initial capacity of 1194.7 mAh g −1 at 0.1 C, a high level of capacity retention of 799.3 mAh g −1 after 300 cycles at 0.5 C, and reliable operation in soft-package batteries. The present MXene/1T-2H MoS 2 -C becomes among the best cathode materials for Li-S batteries.

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“…2,9,21 Thus, the integration of MoS 2 with conductive CC will guarantee the combination of fast electron transport and superior mechanical stability. [22][23][24] The prerequisites for the design and preparation of an integrated electrode has been studied in the present investigation. Ultrathin MoS 2 nanoakes were anchored on top of the carbon cloth substrate by using a hydrothermal approach (denoted as CC@MoS 2 ).…”

Section: Introductionmentioning

confidence: 99%

An integrated electrode based on nanoflakes of MoS₂ on carbon cloth for enhanced lithium storage

Guo

Fang

et al. 2020

RSC Adv.

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Phase-transformation engineering in MoS 2 on carbon cloth as flexible binder-free anode for enhancing lithium storage

Cited by 73 publications

References 56 publications

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS₂ for High Rate Lithium‐Ion Batteries

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS₂ for High Rate Lithium‐Ion Batteries

Rational Design of MXene/1T‐2H MoS₂‐C Nanohybrids for High‐Performance Lithium–Sulfur Batteries

An integrated electrode based on nanoflakes of MoS₂ on carbon cloth for enhanced lithium storage

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Phase-transformation engineering in MoS 2 on carbon cloth as flexible binder-free anode for enhancing lithium storage

Cited by 73 publications

References 56 publications

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS2 for High Rate Lithium‐Ion Batteries

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS2 for High Rate Lithium‐Ion Batteries

Rational Design of MXene/1T‐2H MoS2‐C Nanohybrids for High‐Performance Lithium–Sulfur Batteries

An integrated electrode based on nanoflakes of MoS2 on carbon cloth for enhanced lithium storage

Contact Info

Product

Resources

About

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS₂ for High Rate Lithium‐Ion Batteries

Ion Transport Nanotube Assembled with Vertically Aligned Metallic MoS₂ for High Rate Lithium‐Ion Batteries

Rational Design of MXene/1T‐2H MoS₂‐C Nanohybrids for High‐Performance Lithium–Sulfur Batteries

An integrated electrode based on nanoflakes of MoS₂ on carbon cloth for enhanced lithium storage