Synthesis of Mesoporous Single Crystal Co(OH)2 Nanoplate and Its Topotactic Conversion to Dual-Pore Mesoporous Single Crystal Co3O4

Jia, Bao Rui; Qin, Ming; Li, Shu Mei; Zhang, Zi Li; Lü, Hui; Chen, Peng Qi; Wu, Hao; Lü, Xin; Zhang, Lin; Qu, Xuanhui

doi:10.1021/acsami.6b02768

Cited by 37 publications

(20 citation statements)

References 47 publications

(96 reference statements)

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“…Figure i presents the N 2 adsorption–desorption isotherms and the Barret–Joyner–Halenda (BJH) pore‐size distribution curves of the MoS 2 /N‐doped‐C tube. The material has a type IV isotherm with a hysteresis loop in the Brunauer, Deming, Deming, and Teller classification, which confirms the existence of mesopores in the tubes . The Brunauer–Emmett–Teller–specific surface area is 51.9 m 2 g −1 ; it is much higher than that of the pure MoS 2 (5.9 m 2 g −1 ) (Figure S11, Supporting Information).…”

Section: Resultsmentioning

confidence: 67%

Bamboo‐Like Hollow Tubes with MoS₂/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Jia

Zhao

et al. 2018

Adv Funct Materials

274

181

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Potassium-ion batteries (KIBs) are new-concept of low-cost secondary batteries, but the sluggish kinetics and huge volume expansion during cycling, both rooted in the size of large K ions, lead to poor electrochemical behavior. Here, a bamboo-like MoS 2 /N-doped-C hollow tubes are presented with an expanded interlayer distance of 10 Å as a high-capacity and stable anode material for KIBs. The bamboo-like structure provides gaps along axial direction in addition to inner cylinder hollow space to mitigate the strains in both radial and vertical directions that ultimately leads to a high structural integrity for stable long-term cycling. Apart from being a constituent of the interstratified structure the N-doped-C layers weave a cage to hold the potassiation products (polysulfide and the Mo nanoparticles) together, thereby effectively hindering the continuing growth of solid electrolyte interphase in the interior of particles. The density functional theory calculations prove that the MoS 2 /N-doped-C atomic interface can provide an additional attraction toward potassium ion. As a result, it delivers a high capacity at a low current density (330 mAh g −1 at 50 mA g −1 after 50 cycles) and a high-capacity retention at a high current density (151 mAh g −1 at 500 mA g −1 after 1000 cycles).

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Section: Resultsmentioning

confidence: 67%

Bamboo‐Like Hollow Tubes with MoS₂/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Jia

Zhao

et al. 2018

Adv Funct Materials

274

181

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“…The lattice fringes of 3.68 Å indicated in a representative high‐resolution transmission electron microscopy (HRTEM) image correspond to the (012) planes of α‐Fe 2 O 3 (Figure i). The adsorption–desorption isotherm (Figure S7a, Supporting Information) belongs to a type‐IV curve with an H3 hysteresis loop, and the specific surface area was calculated to be 48.9 m 2 g −1 , according to the Brunauer–Emmett–Teller method. The pore size distribution mainly ranges from 10 to 40 nm (Figure S7b, Supporting Information), confirming the mesoporous structure.…”

Section: Resultsmentioning

confidence: 94%

Optimization of Von Mises Stress Distribution in Mesoporous α‐Fe₂O₃/C Hollow Bowls Synergistically Boosts Gravimetric/Volumetric Capacity and High‐Rate Stability in Alkali‐Ion Batteries

Qin

Zhang

Zhao

et al. 2019

Adv Funct Materials

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Hollow structures are often used to relieve the intrinsic strain on metal oxide electrodes in alkali-ion batteries. Nevertheless, one common drawback is that the large interior space leads to low volumetric energy density and inferior electric conductivity. Here, the von Mises stress distribution on a mesoporous hollow bowl (HB) is simulated via the finite element method, and the vital role of the porous HB structure on strain-relaxation behavior is confirmed. Then, N-doped-C coated mesoporous α-Fe 2 O 3 HBs are designed and synthesized using a multistep soft/hard-templating strategy. The material has several advantages: (i) there is space to accommodate strains without sacrificing volumetric energy density, unlike with hollow spheres; (ii) the mesoporous hollow structure shortens ion diffusion lengths and allows for high-rate induced lithiation reactivation; and (iii) the N-doped carbon nanolayer can enhance conductivity. As an anode in lithium-ion batteries, the material exhibits a very high reversible capacity of 1452 mAh g −1 at 0.1 A g −1 , excellent cycling stability of 1600 cycles (964 mAh g −1 at 2 A g −1 ), and outstanding rate performance (609 mAh g −1 at 8 A g −1 ). Notably, the volumetric specific capacity of composite electrode is 42% greater than that of hollow spheres. When used in potassium-ion batteries, the material also shows high capacity and cycle stability.

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“…In the present investigation the observed variation in ‘a’ values was due to the self‐interstitials and mechanically induced strains developed during nucleation . Co 3 O 4 formation mechanism is given as below:

true Co^{2 +} + 6 H_{2} normalO \to [Co (normalH_{2} normalO)_{6}]^{2 +}

true NH_{3} + normalH_{2} normalO \to NH^{4 +} + OH^{^{-}}

true [Co (normalH_{2} normalO)_{6}]^{2 +} + 2 OH^{^{-}} \to Co (OH)_{2} + 6 H_{2} normalO

true 6 Co (OH)_{2} + normalO_{2} \to 2 Co_{3} normalO_{4} + 6 H_{2} normalO

…”

Section: Resultsmentioning

confidence: 95%

Nano Co₃O₄ as Anode Material for Li–Ion and Na‐Ion Batteries: An Insight into Surface Morphology

Subalakshmi

Sivashanmugam

2018

ChemistrySelect

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Co 3 O 4 is regarded as a competent anode material for lithium and sodium ion batteries having high theoretical capacity of 890 mAh g -1 obtained through metal displacement reaction with Li or Na. Nano Co 3 O 4 consisting of 20-30 nm-sized particles was synthesized through a simple precipitation method and characterized through X-ray diffraction, Fouriertransform infrared spectroscopy, scanning electron microscopy, Transmission electron microscopy and X-ray photoelectron spectroscopy. Electrochemical evaluation of the nano Co 3 O 4 as anode material for Li-ion and Na-ion batteries was performed through cyclic voltammetry, electrochemical impedance spectroscopy and charge-discharge cycling studies. Nano Co 3 O 4 delivered high discharge capacity of 423 mAh g -1 at 0.1 C even after 40 cycles as Li-ion battery anode and exhibited stable discharge behaviour up to 130 cycles with high rate capability. Nano Co 3 O 4 in Na-ion configuration delivered discharge capacity of 101 mAh g -1 at 0.1 C rate even after 30 cycles. At higher current rates Co 3 O 4 electrodes exhibited severe capacity fading due to the huge volume change occurred during sodiation / desodiation. Ex-situ SEM and elemental analyses evidenced that disintegration of electrode structure resulting from volume change and continuous decomposition of electrolyte were responsible for the poor electrochemical performance of Co 3 O 4 with Na + ions while in Li-ion configuration nano Co 3 O 4 outshined in cycling performance.[a] Prof.

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Synthesis of Mesoporous Single Crystal Co(OH)₂ Nanoplate and Its Topotactic Conversion to Dual-Pore Mesoporous Single Crystal Co₃O₄

Cited by 37 publications

References 47 publications

Bamboo‐Like Hollow Tubes with MoS₂/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Bamboo‐Like Hollow Tubes with MoS₂/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Optimization of Von Mises Stress Distribution in Mesoporous α‐Fe₂O₃/C Hollow Bowls Synergistically Boosts Gravimetric/Volumetric Capacity and High‐Rate Stability in Alkali‐Ion Batteries

Nano Co₃O₄ as Anode Material for Li–Ion and Na‐Ion Batteries: An Insight into Surface Morphology

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Synthesis of Mesoporous Single Crystal Co(OH)2 Nanoplate and Its Topotactic Conversion to Dual-Pore Mesoporous Single Crystal Co3O4

Cited by 37 publications

References 47 publications

Bamboo‐Like Hollow Tubes with MoS2/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Bamboo‐Like Hollow Tubes with MoS2/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Optimization of Von Mises Stress Distribution in Mesoporous α‐Fe2O3/C Hollow Bowls Synergistically Boosts Gravimetric/Volumetric Capacity and High‐Rate Stability in Alkali‐Ion Batteries

Nano Co3O4 as Anode Material for Li–Ion and Na‐Ion Batteries: An Insight into Surface Morphology

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Synthesis of Mesoporous Single Crystal Co(OH)₂ Nanoplate and Its Topotactic Conversion to Dual-Pore Mesoporous Single Crystal Co₃O₄

Bamboo‐Like Hollow Tubes with MoS₂/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Bamboo‐Like Hollow Tubes with MoS₂/N‐Doped‐C Interfaces Boost Potassium‐Ion Storage

Optimization of Von Mises Stress Distribution in Mesoporous α‐Fe₂O₃/C Hollow Bowls Synergistically Boosts Gravimetric/Volumetric Capacity and High‐Rate Stability in Alkali‐Ion Batteries

Nano Co₃O₄ as Anode Material for Li–Ion and Na‐Ion Batteries: An Insight into Surface Morphology