Ultrahigh rate capability and ultralong cycling stability of sodium-ion batteries enabled by wrinkled black titania nanosheets with abundant oxygen vacancies

Ma, Lianbo; Gao, Xin; Zhang, Wenjun; Yuan, Hao; Hu, Yi; Zhu, Guoyin; Chen, Renpeng; Chen, Tao; Tie, Zuoxiu; Liu, Jie; Wu, Tom; Jin, Zhong

doi:10.1016/j.nanoen.2018.08.043

Cited by 47 publications

(19 citation statements)

References 49 publications

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“…And the peaks at 815 cm −1 and 880 cm −1 correspond to the asymmetric stretching vibrations of O‐Mo‐O, while the peak at 938 cm −1 is the symmetric stretching vibrations of O‐Mo‐O [36] . For CoMoO 4 ‐N 2 , the intensities of Raman peaks decrease and shift to the lower frequencies in comparison to that of CoMoO 4 ‐Air, indicating the existence of the increased distorted crystal lattice and disordered surface caused by oxygen vacancies [37,38] …”

Section: Resultsmentioning

confidence: 99%

“…[36] For CoMoO -N , the intensities of Raman peaks decrease and shift to the lower frequencies in comparison to that of CoMoO 4 -Air, indicating the existence of the increased distorted crystal lattice and disordered surface caused by oxygen vacancies. [37,38] The XPS detection is performed to study the detailed electronic states and chemical composition of the samples. The Co 2p spectrum in Figure 3c can be well assigned to the Co 2 + 2p 1/2 (796.9 eV), 2p 3/2 (780.5 eV), and their satellite peaks, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

et al. 2020

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The application of transition-metal oxides in the energy storage field is hampered by its low electronic conductivity, sluggish Li + diffusion, and huge volume changes. The construction of oxygen vacancy defects can effectively modify the electronic structure of the active materials, accelerating the charge transfer process. Herein, the CoMoO 4 nanorods with different oxygen vacancy concentrations are synthesized through the facile calcination process under N 2 and Air atmospheres. The ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) analysis and Density Functional Theory (DFT) calculation results confirm that the bandgap reduces along with the increment of the oxygen vacancy content. The CoMoO 4-N 2 with higher oxygen vacancy concentration exhibits more superior electrochemical performance than CoMoO 4-Air, which delivers an ultrahigh specific capacity (999 mA h g À 1 after 500 cycles at 0.5 A g À 1), remarkable rate capacity (477 mA h g À 1 at 9 A g À 1), and excellent cycling stability (650 mA h g À 1 after 1000 cycles at 2 A g À 1).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tailoring Oxygen Vacancies in CoMoO₄ for Superior Lithium Storage

et al. 2020

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“…Up to now, plenty of reported BMS anode in SIBs refer to their combination with carbon-based materials. Thus, it is important for the development of SIBs anode materials to fully study the merits of nanostructured materials (Lu et al, 2017;Ma et al, 2018). In the future, much more efforts need to be made to overcome the disadvantage of poor long-term cycling.…”

Section: Discussionmentioning

confidence: 99%

Recent Advances of Bimetallic Sulfide Anodes for Sodium Ion Batteries

Huang

Xiong

et al. 2020

Front. Chem.

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The high usage for new energy has been promoting the next-generation energy storage systems (ESS). As promising alternatives to lithium ion batteries (LIBs), sodium ion batteries (SIBs) have caused extensive research interest owing to the high natural Na abundance of 2.4 wt.% (vs. 0.0017 wt.% for Li) in the earth's crust and the low cost of it. The development of high-performance electrode materials has been challenging due to the increase in the feasibility of SIBs technology. In the past years, bimetallic sulfides (BMSs) with high theoretical capacity and outstanding redox reversibility have shown great promise as high performance anode materials for SIBs. Herein, the recent advancements of BMSs as anode for SIBs are reported, and the electrochemical mechanism of these electrodes are systematically investigated. In addition, the current issues, challenges, and perspectives are highlighted to address the extensive understanding of the associated electrochemical process, aiming to provide an insightful outlook for possible directions of anode materials for SIBs.

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“…14,[21][22][23] All the three proposed Na-ion redox mechanisms nd their own support from different experimental results. [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] Recently, it was found that the sodiation processes in the internal region and near the surface region of a-TiO 2 particles differed signicantly. 35,37,38,41 Furthermore, the literature also demonstrates that the sodiated phase compositions of a-TiO 2 depend strongly on the morphology, 33,42 crystallinity, 43,44 surface status, 24,[45][46][47] particle size, 48 cycling numbers, 23,25,31,47,49 and solid electrolyte interphase (SEI)-controlled Na-ion diffusion kinetics.…”

Section: Introductionmentioning

confidence: 99%