A unique characteristic of piezoelectric materials is their ability of electric-mechanical transduction and converting mechanical energy to electrical energy or vice versa. This remarkable property, embedded in piezoe...A unique characteristic of piezoelectric materials is their ability of electric-mechanical transduction and converting mechanical energy to electrical energy or vice versa. This remarkable property, embedded in piezoelectric materials,has been exploited to construct a wide variety of展开更多
Gallium(Ga)-doped Zn O is regarded as a promising plasmonic material with a wide range of applications in plasmonics. In this study, zinc self-diffusion experiments are adopted to disclose the nature of the dominant c...Gallium(Ga)-doped Zn O is regarded as a promising plasmonic material with a wide range of applications in plasmonics. In this study, zinc self-diffusion experiments are adopted to disclose the nature of the dominant compensating defect in Ga-doped Zn O isotopic heterostructures. The(Ga_(Zn)-V_(Zn))^- complex defect, instead of the isolated V_(Zn)^(2-), is identified as the predominant compensating acceptor center responsible for the low donor doping efficiency. The comparative diffusion experiments operated by the secondary ion mass spectrometry reveal a ~0.78 e V binding energy of this complex defect, which well matches the electrical activation energy derived from the temperature-dependent Hall effect measurements(^(0.82±0.02) e V). These findings contribute to an essential understanding of the(Ga_(Zn)-V_(Zn))^- complex defect and the potential engineering routes of heavily Ga-doped ZnO.展开更多
Aqueous electrolytes are safe,economic,and environmentally friendly.However,they have a narrow potential window.On the other hand,organic electrolytes exhibit good thermodynamic stability but are inflammable and moist...Aqueous electrolytes are safe,economic,and environmentally friendly.However,they have a narrow potential window.On the other hand,organic electrolytes exhibit good thermodynamic stability but are inflammable and moisture sensitive.In this study,we prepared water-PEG-lipid ternary electrolytes(TEs).To combine the advantages of water,polyethylene glycol(PEG)and propylene carbonate(PC).The nonflammable mixed electrolytes exhibited a wide potential window of about 2.8 V due to the beneficial effects of PEG and PC.Using these TEs,a lithium manganate-active carbon ion capacitor could be operated at 2.4 V with an energy density of 32 Wh/kg,based on the total active electrode material(current density of 3.3 m A/cm^(2)).This value was significantly higher than that achieved using an aqueous electrolyte,thereby rationalizing the higher energy density.展开更多
基金supported by the National Natural Science Foundation of China(Grants Nos.11674405,and 11675280)
文摘A unique characteristic of piezoelectric materials is their ability of electric-mechanical transduction and converting mechanical energy to electrical energy or vice versa. This remarkable property, embedded in piezoelectric materials,has been exploited to construct a wide variety of
基金supported by the National Natural Science Foundation of China(Grants Nos.11674405,and 11675280)
文摘Gallium(Ga)-doped Zn O is regarded as a promising plasmonic material with a wide range of applications in plasmonics. In this study, zinc self-diffusion experiments are adopted to disclose the nature of the dominant compensating defect in Ga-doped Zn O isotopic heterostructures. The(Ga_(Zn)-V_(Zn))^- complex defect, instead of the isolated V_(Zn)^(2-), is identified as the predominant compensating acceptor center responsible for the low donor doping efficiency. The comparative diffusion experiments operated by the secondary ion mass spectrometry reveal a ~0.78 e V binding energy of this complex defect, which well matches the electrical activation energy derived from the temperature-dependent Hall effect measurements(^(0.82±0.02) e V). These findings contribute to an essential understanding of the(Ga_(Zn)-V_(Zn))^- complex defect and the potential engineering routes of heavily Ga-doped ZnO.
基金supported by the National Natural Science Foundation of China(No.11975043)the Natural Science Foundation of Shandong Province(No.ZR2017LEM011)。
文摘Aqueous electrolytes are safe,economic,and environmentally friendly.However,they have a narrow potential window.On the other hand,organic electrolytes exhibit good thermodynamic stability but are inflammable and moisture sensitive.In this study,we prepared water-PEG-lipid ternary electrolytes(TEs).To combine the advantages of water,polyethylene glycol(PEG)and propylene carbonate(PC).The nonflammable mixed electrolytes exhibited a wide potential window of about 2.8 V due to the beneficial effects of PEG and PC.Using these TEs,a lithium manganate-active carbon ion capacitor could be operated at 2.4 V with an energy density of 32 Wh/kg,based on the total active electrode material(current density of 3.3 m A/cm^(2)).This value was significantly higher than that achieved using an aqueous electrolyte,thereby rationalizing the higher energy density.
