In this paper,we consider the initial-boundary value problem(IBVP)for the micropolar Naviers-Stokes equations(MNSE)and analyze a first order fully discrete mixed finite element scheme.We first establish some regularit...In this paper,we consider the initial-boundary value problem(IBVP)for the micropolar Naviers-Stokes equations(MNSE)and analyze a first order fully discrete mixed finite element scheme.We first establish some regularity results for the solution of MNSE,which seem to be not available in the literature.Next,we study a semi-implicit time-discrete scheme for the MNSE and prove L2-H1 error estimates for the time discrete solution.Furthermore,certain regularity results for the time discrete solution are establishes rigorously.Based on these regularity results,we prove the unconditional L2-H1 error estimates for the finite element solution of MNSE.Finally,some numerical examples are carried out to demonstrate both accuracy and efficiency of the fully discrete finite element scheme.展开更多
With the rapid development of energy storage technology,solid-state lithium batteries with high energy density,power density,and safety are considered as the ideal choice for the next generation of energy storage devi...With the rapid development of energy storage technology,solid-state lithium batteries with high energy density,power density,and safety are considered as the ideal choice for the next generation of energy storage devices.Solid electrolytes have attracted considerable attention as key components of solid-state batteries.Compared with inorganic solid electrolytes,solid polymer electrolytes have better flexibility,machinability,and more importantly,better contact with the electrode,and low interfacial impedance.However,its low ionic conductivity,narrow electrochemical stability window(ESW),and poor mechanical properties at room temperature limit its development and practical applications.In recent years,many studies have focused on improving the ionic conductivity of polymer electrolytes;however,few systematic studies and reviews have been conducted on their ESWs.A polymer electrolyte with wide electrochemical window will aid battery operation at a high voltage,which can effectively improve their energy density.Moreover,their stability toward lithium metal anode is also important.Therefore,this review summarizes the recent progress of solid polymer electrolytes on the ESW,discusses the factors affecting ESW of polymer electrolytes,and analyzes a strategy to broaden the window from the perspective of molecular interaction,polymer structural design,and interfacial tuning.The development trends of polymer electrolytes with wide electrochemical windows are also presented.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.11871467,11471329).
文摘In this paper,we consider the initial-boundary value problem(IBVP)for the micropolar Naviers-Stokes equations(MNSE)and analyze a first order fully discrete mixed finite element scheme.We first establish some regularity results for the solution of MNSE,which seem to be not available in the literature.Next,we study a semi-implicit time-discrete scheme for the MNSE and prove L2-H1 error estimates for the time discrete solution.Furthermore,certain regularity results for the time discrete solution are establishes rigorously.Based on these regularity results,we prove the unconditional L2-H1 error estimates for the finite element solution of MNSE.Finally,some numerical examples are carried out to demonstrate both accuracy and efficiency of the fully discrete finite element scheme.
基金supported by the National Natural Science Foundation of China(No.U21A20170,21875284 and 22075320)the Ministry of Science and Technology of China(No.2021YFB2501900,2019YFE0100200 and 2019YFA0705703)the Fundamental Research Funds for the Central Universities(FRF-MP-20-28).
文摘With the rapid development of energy storage technology,solid-state lithium batteries with high energy density,power density,and safety are considered as the ideal choice for the next generation of energy storage devices.Solid electrolytes have attracted considerable attention as key components of solid-state batteries.Compared with inorganic solid electrolytes,solid polymer electrolytes have better flexibility,machinability,and more importantly,better contact with the electrode,and low interfacial impedance.However,its low ionic conductivity,narrow electrochemical stability window(ESW),and poor mechanical properties at room temperature limit its development and practical applications.In recent years,many studies have focused on improving the ionic conductivity of polymer electrolytes;however,few systematic studies and reviews have been conducted on their ESWs.A polymer electrolyte with wide electrochemical window will aid battery operation at a high voltage,which can effectively improve their energy density.Moreover,their stability toward lithium metal anode is also important.Therefore,this review summarizes the recent progress of solid polymer electrolytes on the ESW,discusses the factors affecting ESW of polymer electrolytes,and analyzes a strategy to broaden the window from the perspective of molecular interaction,polymer structural design,and interfacial tuning.The development trends of polymer electrolytes with wide electrochemical windows are also presented.