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Interfacial and Electronic Modulation via Localized Sulfurization for Boosting Lithium Storage Kinetics

Journal Article


Abstract


  • © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Structural modulation endows electrochemical hybrids with promising energy storage properties owing to their adjustable interfacial and/or electronic characteristics. For MXene-based materials, however, the facile but effective strategies for tuning their structural properties at nanoscale are still lacking. Herein, 3D crumpled S-functionalized Ti3C2Tx substrate is rationally integrated with Fe3O4/FeS heterostructures via coprecipitation and subsequent partial sulfurization to induce a highly active and stable electrode architecture. The unique heterostructures with tuned electronic properties can induce improved kinetics and structural stability. The surface engineering by S terminations on the MXene further unlocks extra (pseudo)capacitive lithium storage. Serving as anode for lithium storage, the optimized electrode delivers an excellent long-term cycling stability (913.9 mAh g−1 after 1000 cycles at 1 A g−1) and superior rate capability (490.4 mAh g−1 at 10 A g−1). Moreover, the (de)lithiation pathways associated with energy storage mechanisms are further revealed by operando X-ray diffraction, in situ electroanalytical techniques, and first-principles calculations. The hybrid electrode is proved to undergo stepwise phase transformations during discharging but a relatively uniform reconversion during charging, suggesting an asymmetric conversion mechanism. This work provides a novel strategy for designing high-performance hybrids and paves the way for in-depth understanding of complex lithium intercalation and conversion reactions.

Authors


  •   Ruan, Tingting (external author)
  •   Wang, Bo (external author)
  •   Yang, Yubo (external author)
  •   Zhang, Xu (external author)
  •   Song, Rensheng (external author)
  •   Ning, Yu (external author)
  •   Wang, Zhenbo (external author)
  •   Yu, Haijun (external author)
  •   Zhou, Yu (external author)
  •   Wang, Dianlong (external author)
  •   Liu, Hua K.
  •   Dou, Shi Xue

Publication Date


  • 2020

Citation


  • Ruan, T., Wang, B., Yang, Y., Zhang, X., Song, R., Ning, Y., Wang, Z., Yu, H., Zhou, Y., Wang, D., Liu, H. & Dou, S. (2020). Interfacial and Electronic Modulation via Localized Sulfurization for Boosting Lithium Storage Kinetics. Advanced Materials,

Scopus Eid


  • 2-s2.0-85081286856

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4073

Has Global Citation Frequency


Place Of Publication


  • Germany

Abstract


  • © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Structural modulation endows electrochemical hybrids with promising energy storage properties owing to their adjustable interfacial and/or electronic characteristics. For MXene-based materials, however, the facile but effective strategies for tuning their structural properties at nanoscale are still lacking. Herein, 3D crumpled S-functionalized Ti3C2Tx substrate is rationally integrated with Fe3O4/FeS heterostructures via coprecipitation and subsequent partial sulfurization to induce a highly active and stable electrode architecture. The unique heterostructures with tuned electronic properties can induce improved kinetics and structural stability. The surface engineering by S terminations on the MXene further unlocks extra (pseudo)capacitive lithium storage. Serving as anode for lithium storage, the optimized electrode delivers an excellent long-term cycling stability (913.9 mAh g−1 after 1000 cycles at 1 A g−1) and superior rate capability (490.4 mAh g−1 at 10 A g−1). Moreover, the (de)lithiation pathways associated with energy storage mechanisms are further revealed by operando X-ray diffraction, in situ electroanalytical techniques, and first-principles calculations. The hybrid electrode is proved to undergo stepwise phase transformations during discharging but a relatively uniform reconversion during charging, suggesting an asymmetric conversion mechanism. This work provides a novel strategy for designing high-performance hybrids and paves the way for in-depth understanding of complex lithium intercalation and conversion reactions.

Authors


  •   Ruan, Tingting (external author)
  •   Wang, Bo (external author)
  •   Yang, Yubo (external author)
  •   Zhang, Xu (external author)
  •   Song, Rensheng (external author)
  •   Ning, Yu (external author)
  •   Wang, Zhenbo (external author)
  •   Yu, Haijun (external author)
  •   Zhou, Yu (external author)
  •   Wang, Dianlong (external author)
  •   Liu, Hua K.
  •   Dou, Shi Xue

Publication Date


  • 2020

Citation


  • Ruan, T., Wang, B., Yang, Y., Zhang, X., Song, R., Ning, Y., Wang, Z., Yu, H., Zhou, Y., Wang, D., Liu, H. & Dou, S. (2020). Interfacial and Electronic Modulation via Localized Sulfurization for Boosting Lithium Storage Kinetics. Advanced Materials,

Scopus Eid


  • 2-s2.0-85081286856

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/4073

Has Global Citation Frequency


Place Of Publication


  • Germany