Exposed facet engineering design of graphene-SnO2 nanorods for ultrastable Li-ion batteries

Pan, Lu; Zhang, Yihui; Lu, Fei; Du, Yu; Lu, Zongjing; Yang, Yijun; Ye, Tao; Liang, Qifeng; Bando, Yoshio; Wang, Xi

doi:10.1016/j.ensm.2018.10.007

Cited by 54 publications

(21 citation statements)

References 47 publications

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“…However, the presence of the binder decreases the overall electronic conductivity, but increases the electrochemical polarization in the anode. As reported in the literature (Kumar et al, 2019;Pan et al, 2019), polymetric conductive binders with strong mechanical binding force and even self-healing capability have been demonstrated to address detrimental volume effects of oxide/metal-based anode materials. Moreover, such polymetric binders play an additional role in offering the desired pathway for the charge transfer, resulting in free conductive carbon additives in the anode.…”

Section: Introductionmentioning

confidence: 94%

Free-Standing SnO2@rGO Anode via the Anti-solvent-assisted Precipitation for Superior Lithium Storage Performance

et al. 2019

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Metal oxides have been attractive as high-capacity anode materials for lithium-ion batteries. However, oxide anodes encounter drastic volumetric changes during lithium ion storage through the conversion reaction and alloying/dealloying processes, leading to rapid capacity decay and poor cycling stability. Here, we report a free-standing SnO 2 @reduced graphene oxide (SnO 2 @rGO) composite anode, in which SnO 2 nanoparticles are tightly wrapped within wrinkled rGO sheets. The SnO 2 @rGO sheet is assembled in high porosity via an anti-solvent-assisted precipitation of dispersed SnO 2 nanoparticles and graphene oxide sheets in the distilled water, followed by the filtration and post-annealing processes. Significantly enhanced lithium storage performance has been obtained of the SnO 2 @rGO anode compared with the bare SnO 2 anode material. A high charge capacity above 700 mAh g −1 can be achieved with a satisfying 95.6% retention after 50 cycles at a current density of 500 mA g −1 , superior to reserved 126 mAh g −1 and a much lower 16.8% retention of the bare SnO 2 anode. XRD pattern and HRTEM images of the cycled SnO 2 @rGO anode material verify the expected oxidation of Sn to SnO 2 at the fully-charged state in the 50th cycle. In addition, FESEM and TEM images reveal the well-preserved free-standing structure after cycling, which accounts for high reversible capacity and excellent cycling stability of such a SnO 2 @rGO anode. This work provides a promising SnO 2-based anode for high-capacity lithium-ion batteries, together with an effective fabrication adoptable to prepare different free-standing composite materials for device applications.

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Section: Introductionmentioning

confidence: 94%

Free-Standing SnO2@rGO Anode via the Anti-solvent-assisted Precipitation for Superior Lithium Storage Performance

et al. 2019

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“…Obviously, μ 1 is dominated by the active materials, μ 2 is controlled by the electrolyte and additives, and μ 3 is governed by the electrolyte. Therefore, an increase in μ 1 , μ 2 and μ 3 leads to a high-performance battery [20,21] .…”

Section: Semiconductor-electrochemistry Modelmentioning

confidence: 99%

A semiconductor-electrochemistry model for design of high-rate Li ion battery

Zhang

Wang

Zheng

2020

Journal of Energy Chemistry

112

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“…Among various pseudocapacitive materials, tin oxide (SnO 2 ) has attracted intense attention as a negative electrode for SCs due to its appropriate working potential window (0 to −0.9 V vs Ag/AgCl), large theoretical specific capacitance, environmentally benign nature, low cost, and so on. Nevertheless, the reported SnO 2 ‐based electrodes achieved limited practical capacitance of less than 200 F g −1 , which is far below its theoretical expectation 15. Consequently, intensive efforts have been devoted to enhancing the specific capacitance of SnO 2 without comprising the power capability.…”

Section: Introductionmentioning

confidence: 95%

Oxygen‐Deficient Homo‐Interface toward Exciting Boost of Pseudocapacitance

Liu

Sun

Jia

et al. 2020

Adv Funct Materials

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Pseudocapacitors hold great promise as charge storage systems that combine battery‐level energy density and capacitor‐level power density. The utilization of pseudocapacitive material, however, is usually restricted to the surface due to poor electrode kinetics, leading to less accessible charge storage sites and limited capacitance. Here, tin oxide is successfully endowed with outstanding pseudocapacitance and fast electrode kinetics in a negative potential window by engineering oxygen‐deficient homo‐interfaces. The as‐prepared SnO2−x@SnO2−x electrode yields a specific capacitance of 376.6 F g−1 at the current density of 2.5 A g−1 and retains 327 F g−1 at a high current density of 80 A g−1. The theoretical calculation reveals that the oxygen defects are more favorable at homo‐interfaces than at the surface due to the lower defect formation energy. Meanwhile, as compared with the surface, the homo‐interface possesses more stable Li+ storage sites that are readily accessed by Li+ due to the occurrence of oxygen vacancies, enabling outstanding pseudocapacitance as well as high rate capability. This oxygen‐deficient homo‐interface design opens up new opportunities to develop high‐energy and power pseudocapacitors.

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Exposed facet engineering design of graphene-SnO2 nanorods for ultrastable Li-ion batteries

Cited by 54 publications

References 47 publications

Free-Standing SnO2@rGO Anode via the Anti-solvent-assisted Precipitation for Superior Lithium Storage Performance

Free-Standing SnO2@rGO Anode via the Anti-solvent-assisted Precipitation for Superior Lithium Storage Performance

A semiconductor-electrochemistry model for design of high-rate Li ion battery

Oxygen‐Deficient Homo‐Interface toward Exciting Boost of Pseudocapacitance

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