Metal anodes based on plating/stripping electrochemistry,for instance,common alkaline metal lithium(Li),sodium(Na),potassium(K),polyvalent metal magnesium(Mg),aluminum(Al),calcium(Ca)and zinc(Zn)are imminently evoked ...Metal anodes based on plating/stripping electrochemistry,for instance,common alkaline metal lithium(Li),sodium(Na),potassium(K),polyvalent metal magnesium(Mg),aluminum(Al),calcium(Ca)and zinc(Zn)are imminently evoked and increasingly researched for future generation high-energy-density rechargeable batteries due to their large theoretical capacity,low electrochemical potential,and superior electronic conductivity in recent years.However,the uncontrolled dendrite formation issue induces low Coulombic efficiency,short lifespan,and hazardous security risks,hindering the actual applications of metal batteries.Among various solutions,the utilization of ferro-/piezoelectric materials for metal anodes displays active effects on decreasing local current density,suppressing dendrite growth,and tolerating volume expansion benefits from the unique ferro-/piezoelectric polarization effect.This review presents the research progress of ferro-/piezoelectric polarization effect for regulating the dendritic growth of metal anodes for the first time.First,the current challenges and strategies of metal anodes are proposed.Then,ferro-/piezoelectric materials and their working principle are discussed.Finally,the recent research progress of ferroelectric and piezoelectric materials on dynamic regulation of dendrite growth is summarized,and the future perspectives are prospected.We hope this review could draw more attention in designing metal anodes with self-polarization materials and promoting their practical applications.展开更多
Structures and hydration activities of ferro-aluminates (Ca2Fe2-xAlxO5 ,x = 0.0. 57 and 0. 72) of cement minerals are studied by SCF-DV-Xa method. one of the molecular orbital calculating method in quantum chemistry. ...Structures and hydration activities of ferro-aluminates (Ca2Fe2-xAlxO5 ,x = 0.0. 57 and 0. 72) of cement minerals are studied by SCF-DV-Xa method. one of the molecular orbital calculating method in quantum chemistry. The calculated results of net charges, energy levels of molecular orbitals and covalent bond orders are all consistent with the increase of Al element, there is superior hydration activity of Ca2Fe2-xAlxO5.展开更多
In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized b...In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD), in order to determine the optimal temperature. The flocculation test was made at 25℃, 45℃ and 65℃, the results indicated that when the temperature was 65℃, the removal efficiency of the oil and COD was the best, which was 87.2% and 92.6% respectively. Then by comparisons among rectorite (REC), PSFA and the composite PSFA-REC at the temperature of 65℃ and the optimal dosage of 11 mg/L, the composite PSFA-REC showed better flocculation performance than flocculant REC and PSFA alone.展开更多
The ferro resonance caused by an electromagnetic potential transformer is a frequently occurring internal overvoltage in the power distribution network, and it threatens the safe operation of the network. Fast and acc...The ferro resonance caused by an electromagnetic potential transformer is a frequently occurring internal overvoltage in the power distribution network, and it threatens the safe operation of the network. Fast and accurate detection is the prerequisite for suppression and elimination of ferro resonance. Wavelet transform provides a powerful tool for analysis of nonstationary signals. This paper applies wavelet transform to detect ferro resonance. Analysis results show that it makes extraction of failure information accurate, and fast algorithm makes detection real time.展开更多
In this paper, we have established the existence theorem of the weak solution of theboundary problems for systems of ferro-magnetic chain ty means of the viscosity eliminatingmethod and the Leray-Schauder fixed point ...In this paper, we have established the existence theorem of the weak solution of theboundary problems for systems of ferro-magnetic chain ty means of the viscosity eliminatingmethod and the Leray-Schauder fixed point argument.展开更多
基金financially supported by the National Natural Science Foundation of China(No.21571132)。
文摘Metal anodes based on plating/stripping electrochemistry,for instance,common alkaline metal lithium(Li),sodium(Na),potassium(K),polyvalent metal magnesium(Mg),aluminum(Al),calcium(Ca)and zinc(Zn)are imminently evoked and increasingly researched for future generation high-energy-density rechargeable batteries due to their large theoretical capacity,low electrochemical potential,and superior electronic conductivity in recent years.However,the uncontrolled dendrite formation issue induces low Coulombic efficiency,short lifespan,and hazardous security risks,hindering the actual applications of metal batteries.Among various solutions,the utilization of ferro-/piezoelectric materials for metal anodes displays active effects on decreasing local current density,suppressing dendrite growth,and tolerating volume expansion benefits from the unique ferro-/piezoelectric polarization effect.This review presents the research progress of ferro-/piezoelectric polarization effect for regulating the dendritic growth of metal anodes for the first time.First,the current challenges and strategies of metal anodes are proposed.Then,ferro-/piezoelectric materials and their working principle are discussed.Finally,the recent research progress of ferroelectric and piezoelectric materials on dynamic regulation of dendrite growth is summarized,and the future perspectives are prospected.We hope this review could draw more attention in designing metal anodes with self-polarization materials and promoting their practical applications.
文摘Structures and hydration activities of ferro-aluminates (Ca2Fe2-xAlxO5 ,x = 0.0. 57 and 0. 72) of cement minerals are studied by SCF-DV-Xa method. one of the molecular orbital calculating method in quantum chemistry. The calculated results of net charges, energy levels of molecular orbitals and covalent bond orders are all consistent with the increase of Al element, there is superior hydration activity of Ca2Fe2-xAlxO5.
文摘In this study, a novel flocculant was prepared by an inorganic polymetric flocculant (IPF) - polysilicate ferro- aluminum sulfate (PSFA) and rectorite (REC). The structure of the PSFA-REC composite was characterized by Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD), in order to determine the optimal temperature. The flocculation test was made at 25℃, 45℃ and 65℃, the results indicated that when the temperature was 65℃, the removal efficiency of the oil and COD was the best, which was 87.2% and 92.6% respectively. Then by comparisons among rectorite (REC), PSFA and the composite PSFA-REC at the temperature of 65℃ and the optimal dosage of 11 mg/L, the composite PSFA-REC showed better flocculation performance than flocculant REC and PSFA alone.
文摘The ferro resonance caused by an electromagnetic potential transformer is a frequently occurring internal overvoltage in the power distribution network, and it threatens the safe operation of the network. Fast and accurate detection is the prerequisite for suppression and elimination of ferro resonance. Wavelet transform provides a powerful tool for analysis of nonstationary signals. This paper applies wavelet transform to detect ferro resonance. Analysis results show that it makes extraction of failure information accurate, and fast algorithm makes detection real time.
基金Project supported by the National Natural, Science Foundation of China and CAEP.
文摘In this paper, we have established the existence theorem of the weak solution of theboundary problems for systems of ferro-magnetic chain ty means of the viscosity eliminatingmethod and the Leray-Schauder fixed point argument.
基金Project supported by the National Natural science Foundation of china and china Academy of Engineering Physics
文摘The global solvability of homogeneous boundary problem for a class of multidimensional generalized system of ferro-magnetic chain type is considered.
