Synergistic engineering of defects and architecture in Co3O4@C nanosheets toward Li/Na ion batteries with enhanced pseudocapacitances

Sun, Bo; Lou, Shuaifeng; Zheng, Wen-Chen; Qian, Zhengyi; Cui, Can; Zuo, Pengjian; Du, Chunyu; Xie, Jun; Wang, Jiajun; Yin, Geping

doi:10.1016/j.nanoen.2020.105366

Cited by 101 publications

(76 citation statements)

References 56 publications

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“…where k 1 and k 2 are parameters and k 1 v and k 2 v 1/2 represent the capacitive and diffusion‐controlled contributions, [28] respectively. Figure 5 d shows a typical example of the separated capacitive contribution of Co 1− x Se 2 /GE at 1 mV s −1 , the ratio of which is estimated to be 90.1 %.…”

Section: Resultsmentioning

confidence: 99%

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co_1−xSe₂/Graphene Heterostructure for Sodium‐Ion Batteries

et al. 2021

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Electronic structure engineering on electrode materials could bring in a new mechanism to achieve high energy and high power densities in sodium ion batteries. Herein, we design and create Co vacancies at the interface of atomically thin CoSe2/graphene heterostructure and obtain Co1−xSe2/graphene heterostructure electrode materials that facilitate significant Na+ intercalation pseudocapacitance. Density functional theory (DFT) calculation suggests that the Na+ adsorption energy is dramatically increased, and the Na+ diffusion barrier is remarkably reduced due to the introduction of Co vacancy. The optimized electrode delivers a superior capacity of 673.6 mAh g−1 at 0.1 C, excellent rate capability of 576.5 mAh g−1 at 2.0 C and ultra‐long life up to 2000 cycles. Kinetics analysis indicates that the enhanced Na+ storage is mainly attributed to the intercalation pseudocapacitance induced by Co vacancies. This work suggests that the creation of cation vacancy could bestow heterostructured electrode materials with pseudocapacitive Na+ intercalation for high‐capacity and high‐rate energy storage.

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Section: Resultsmentioning

confidence: 99%

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co_1−xSe₂/Graphene Heterostructure for Sodium‐Ion Batteries

et al. 2021

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“…37,42,43 19 The Ov-NiMoO 4 exhibits an ideal vertical line in the low-frequency zone, suggesting a high-ionic conductivity and decreased diffusion resistance, representing rapid ionic penetration. 20 Furthermore, the possible charge-storage kinetics of the Ov-NiMoO 4 electrode was evaluated based on the CVs by the following power-law relationship 3,5,17 :…”

Section: Resultsmentioning

confidence: 99%

“…6,15,16 To address this matter, tremendous research efforts have been dedicated to tailoring nanostructured material with the desirable architecture and introducing defective engineering, which is a promising approach to manipulate the chemical activities and electrical properties to a higher degree. 10,17,18 Significantly, the generation of oxygen vacancy in the metal oxide material can serve as an electronic charge carrier. Furthermore, it could expedite the electrical conductivity, reaction kinetics, and electroactive sites of the electrode materials.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effects of nanoarchitecture and oxygen vacancy in nickel molybdate hollow sphere towards a high‐performance hybrid supercapacitor

Sivakumar

Raj

Park

et al. 2021

Intl J of Energy Research

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The facile design and fabrication of nanoarchitectured binary transition metal oxide electrode materials are essentially required for the advancement of highperformance supercapacitors (SCs). Herein, we prepared an oxygen-vacant NiMoO 4 (Ov-NiMoO 4 ) hollow sphere via a simple hydrothermal approach and subsequent heat treatment under an argon atmosphere. In particular, the oxygen vacancy is confirmed by using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Raman, and differential reflectance spectroscopy (DRS) UV-Vis spectra studies. Furthermore, the generation of the oxygen vacancy could enhance the electrical conductivity and improve Faradaic redox sites. Significantly, the Ov-NiMoO 4 hollow sphere depicts a larger specific capacity (C sp ) of 496 mA h g À1 at 1 A g À1 than the bare-NiMoO 4 (b-NiMoO 4 ; 279 mA h g À1 ) thermally treated under air. Furthermore, the hybrid SC (HSC) is fabricated based on the Ov-NiMoO 4 //activated carbon, revealing a high specific capacitance (C s ) of 120 F g À1 and providing a large energy density (ED) of 37.49 W h kg À1 and power density (PD) of 36.61 kW kg À1 . Moreover, the HSC shows considerable cyclic stability of ~91.14% over 20 000 cycles. The results divulge that the poor crystallinity and the introduction of oxygen vacancies play a vital role in enhancing the charge-storage capability of the materials.

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“…[ 21 ] The transition metal oxides, such as Fe 2 O 3 as anode in SIBs, via a conversion Na‐ion storage mechanism, exhibits a high reversible capacity (more than 500 mAh g −1 ), however, the large volumetric expansion and low ICE limits its practical applications. [ 22–24 ] The iron‐based borate as a polyanion‐type anode materials has low cost, stable crystal structure, and relatively ideal working potential, and has been explored extensively. [ 25–27 ] However, the lower electronic/ionic conductivity and serious interface reaction restrict its electrochemical performance as anode in SIBs.…”

Section: Introductionmentioning

confidence: 99%

“…Although, there have been much works done on investigation of hard carbon, soft carbon, or metal oxide anodes, the shortcomings in terms of poor rate capability, short cycle life, and safety concern still restricts the applications of SIBs in cell level. [ 18–24 ]…”

Section: Introductionmentioning

confidence: 99%

All‐Climate Iron‐Based Sodium‐Ion Full Cell for Energy Storage

Cao

Dong

et al. 2021

Adv Funct Materials

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The anode materials for sodium‐ion batteries (SIBs) such as soft carbon, hard carbon, or alloys suffer from low specific capacity, poor rate capability, and high cost. Various transition metal oxides materials possess high specific capacity and suitable working potential, however, huge volume change and unstable electrode/electrolyte interfaces limit their practical applications. Herein, an ultrathin carbon‐coated iron‐based borate, (Fe3BO5), as an anode material for SIBs is reported. The carbon coated Fe3BO5 composite as an anode material possesses a reversible specific capacity of 548 mAh g−1 with a high initial coulombic efficiency of 72.6% at a current density of 50 mA g−1, and maintains a capacity retention ratio of 99% after 1000 cycles at 2000 mA g−1. Moreover, this anode can work well over a wide temperature range (‐40–60 °C). Furthermore, a sodium‐ion full cell using this anode coupling with iron‐based cathode (Na3Fe2(PO4)2(P2O7)@rGO) cathode is fabricated, which exhibits a wide operating temperature range from −40 to 60 °C with a maximum energy density of 175 Wh Kg−1 and a maximum power density of 1680 W Kg−1. Most importantly, this full‐cell configuration is low‐cost due to its inexpensive iron based raw material for both anode and cathode.

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Synergistic engineering of defects and architecture in Co3O4@C nanosheets toward Li/Na ion batteries with enhanced pseudocapacitances

Cited by 101 publications

References 56 publications

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co_1−xSe₂/Graphene Heterostructure for Sodium‐Ion Batteries

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co_1−xSe₂/Graphene Heterostructure for Sodium‐Ion Batteries

Synergistic effects of nanoarchitecture and oxygen vacancy in nickel molybdate hollow sphere towards a high‐performance hybrid supercapacitor

All‐Climate Iron‐Based Sodium‐Ion Full Cell for Energy Storage

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Synergistic engineering of defects and architecture in Co3O4@C nanosheets toward Li/Na ion batteries with enhanced pseudocapacitances

Cited by 101 publications

References 56 publications

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co1−xSe2/Graphene Heterostructure for Sodium‐Ion Batteries

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co1−xSe2/Graphene Heterostructure for Sodium‐Ion Batteries

Synergistic effects of nanoarchitecture and oxygen vacancy in nickel molybdate hollow sphere towards a high‐performance hybrid supercapacitor

All‐Climate Iron‐Based Sodium‐Ion Full Cell for Energy Storage

Contact Info

Product

Resources

About

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co_1−xSe₂/Graphene Heterostructure for Sodium‐Ion Batteries

Robust Pseudocapacitive Sodium Cation Intercalation Induced by Cobalt Vacancies at Atomically Thin Co_1−xSe₂/Graphene Heterostructure for Sodium‐Ion Batteries