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Xindong Wang
University of Science and Technology Beijing
CatalysisInorganic chemistryChemistryCathodeElectrochemistry
67Publications
18H-index
1,212Citations
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Publications 103
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#1Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
Last. X.C. Ren
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Abstract Shear band plays a key role in fatigue damage and fracture behaviors in metallic glass (MG). The effect of the shear band on fatigue crack growth of a brittle Ti32.8Zr30.2Ni5.3Cu9Be22.7 (ZT3) MG with superior fatigue resistance was investigated by three-point bending fatigue testing in this work. The fatigue crack growth process is classified into three stages based on the shear band feature and crack profile. It is found that the crack path is straight and smooth with no or several she...
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#1Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
#2P. Liu (USTB: University of Science and Technology Beijing)H-Index: 1
Last. Xueping Ren (USTB: University of Science and Technology Beijing)H-Index: 5
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Abstract In this work, we investigated the three-point bending fatigue behavior of a brittle Ti32.8Zr30.2Ni5.3Cu9Be22.7 MG (ZT3) combined with damage morphology observation using scanning electron microscope. It is found that the brittle ZT3 MG possesses the excellent fatigue resistance with the fatigue endurance limit of ~527 MPa based on stress amplitude, and the fatigue ratio of ~0.29 termed as fatigue endurance limit divided by ultimate tensile strength, respectively. The superior fatigue pr...
1 CitationsSource
#1Yang Yu (USTB: University of Science and Technology Beijing)H-Index: 1
#2Zhe Yang (USTB: University of Science and Technology Beijing)H-Index: 2
Last. Feiyu Kang (THU: Tsinghua University)H-Index: 67
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A gentle method is used to treat the precursor to induce the doping of SO42– and Ni2+. The doped SO42– induces the formation of oxygen vacancies and defects, which are beneficial for inhibition of the loss of O2–, stabilization of the structure, and amelioration of voltage decay, and the doped Ni2+ increases the degree of lithium nickel mixing and significantly increases the midvoltage. After modification, the specific discharge capacity reaches 305.20 mAh g–1, with a Coulombic efficiency of 86....
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#1Zhaoyi Yang (USTB: University of Science and Technology Beijing)H-Index: 3
#2Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
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Herein, the pulse temperature is provided during the nucleation period of the nanoparticles to shorten the nucleation time for Pt-based nanoparticle growth. Herein, 3-nm-sized Pt-Ni alloy octahedral catalysts were prepared by pulse-like hydrothermal method. The influence of the pulse on nucleation is demonstrated by comparing the morphology obtained from the conditions of constant temperature and pulse temperature. It has been found that pulse temperature could decrease the nucleation time, and ...
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#1Jianjian Zhong (USTB: University of Science and Technology Beijing)H-Index: 1
#2Zhe Yang (USTB: University of Science and Technology Beijing)H-Index: 2
Last. Feiyu Kang (THU: Tsinghua University)H-Index: 67
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Abstract Lithium-rich layered cathode material Li1.2Ni0.13Co0.13Mn0.54O2 has attracted extensive attention owing to high specific capacity and energy density from its distinctive anionic redox chemistry. However, the material suffers from low Coulombic efficiency, serious capacity attenuation, severe voltage decay which can be ascribed to the irreversible oxygen loss and phase transformation. Herein, oxygen defects are induced through the pre-extraction of lithium and oxygen from Li2MnO3 compone...
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#1Lifan Wang (USTB: University of Science and Technology Beijing)H-Index: 1
#2Gaoyang Liu (USTB: University of Science and Technology Beijing)H-Index: 1
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
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With the rapid development of plug-in hybrid electric vehicles and electric vehicles, high-energy layered lithium nickel-rich oxides have received much attention, but there are still many challenges due to the inherent properties of materials. The poor cycling performance and initial capacity loss of the nickel-rich layered oxide are associated with the structural stability of the material and Li+/Ni2+ cation disorder. Moreover, the synergistic effect of the vacancy of Li and Ni in the delithiat...
2 CitationsSource
#1Zhaoyi Yang (USTB: University of Science and Technology Beijing)H-Index: 3
#2Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
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Abstract In order to inhibit the corrosion of carbon support and agglomeration of Pt nanoparticles in conventional Pt/XC-72 catalyst, the conventional Pt/C catalyst was modified by in-situ deposition of amorphous tungsten carbide (WC) at the catalyst/support interface. The results show that proper amount of WC can improve the performance and durability of catalyst, and excessive addition of W element will combine with oxygen and transform into WO3, thus covering Pt nanoparticles and reducing the...
1 CitationsSource
#1Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
#2Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
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Abstract This paper mainly focuses on the optimization and design of cathode catalyst layer structure for low-Pt loading membrane assembly electrode. When Pt loading at cathode increased from 0.025 mg cm−2 to 0.4 mg cm−2, the apparent current density of electrode increases gradually, while the electrochemical active surface area (ECSA) and the utilization rate of catalyst show a downward trend. As Pt loading at cathode keeps at 0.1 mg cm−2, commercial Vulcan XC-72 carbon are doped into the conve...
1 CitationsSource
#1Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
#2Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
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Abstract This paper focuses on the gradual performance and durability degradation behaviors of a direct methanol fuel cell (DMFC) with more than 3000 h lifetime. This work adopted a new DMFC test strategy and the entire lifetime test consisted of No.1-No.166 single operation. Stage-failure phenomenon occurred in the lifetime test, which indicated the existence of recoverable and non-recoverable degradations during the entire operation process. In-situ electrochemical tests were applied to the DM...
3 CitationsSource
#1Meng Wang (USTB: University of Science and Technology Beijing)H-Index: 9
#2Ming Chen (USTB: University of Science and Technology Beijing)H-Index: 20
Last. Xindong Wang (USTB: University of Science and Technology Beijing)H-Index: 18
view all 8 authors...
Abstract Hydrogen peroxide is added into the anode methanol fuel as a pro-oxygenic agent to improve the electro-oxidation reaction rate of methanol in low-temperature direct methanol fuel cell. Cyclic voltammetry, electrochemical impedance spectroscopy and steady-state polarization with three-electrode system are used to test the catalytic efficiency with different concentrations of hydrogen peroxide additive. The mechanism of pro-oxygenic activity is revealed by cyclic voltammetry method. The r...
4 CitationsSource
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