Herein,AgLi1/3Sn2/3O2 with delafossite structure was prepared by treating the layered compound Li2 SnO3 with molten AgN03 via ion exchange of Li^+for Ag^+.The structure characterization and the electrochemical perform...Herein,AgLi1/3Sn2/3O2 with delafossite structure was prepared by treating the layered compound Li2 SnO3 with molten AgN03 via ion exchange of Li^+for Ag^+.The structure characterization and the electrochemical performance of AgLi1/3Sn2/3O2 was thoroughly investigated.AgLi1/3Sn2/3O2 is found to possess stacking lamellar morphology,which means small electrochemical impedance and so facilitates charge transfer kinetics during the cycling.Compared with Li2 Sn03,due to the introducing of excellent electrical conductivity of silver,AgLi1/3Sn2/3O2 exhibits improved electrochemical performance in terms of capacity,cycling stability and coulombic efficiency.The results show AgLi1/3Sn2/3O2 presents favorable specific capacity of 339 mAh/g at current density of 200 mA/g after 50 cycles and initial coulombic efficiency of 96%.Exsitu XRD analysis revealed the reaction mechanism of AgLi1/3Sn2/3O2 as an anode for lithium ion batteries.展开更多
Lithium(Li)dendrite formation/evolution with its disastrous safety issues has been challenging in high-energy Li-metal batteries.The detrimental Li dendrite is primarily initiated by an inhomogeneous distribution of c...Lithium(Li)dendrite formation/evolution with its disastrous safety issues has been challenging in high-energy Li-metal batteries.The detrimental Li dendrite is primarily initiated by an inhomogeneous distribution of current density that results in uncontrollable Li deposition in the vertical direction.To suppress the Li dendrite formation through selective Li infusion and uniform Li deposition,a unique Janus-structured surface consisting of Zn@Li layer and Ag layers was fabricated on carbon cloth(CC)by step-wise magnetron sputtering.The lower-half Zn layer,enabling selective Li infusion and the rational formation of a Zn@Li layer,was able to regulate the loading amounts of Li metal.Simultaneously,the upper-half lithiophilic Ag layer and derived AgLi layer prevented the vertical Li growth due to a uniform Li deposition.Importantly,the bifunctional surface design guaranteed a sustainable exposure of lithiophilic sites upon Li nucleation/evolution.Interestingly,the symmetrical cells and full cells utilizing the Janus-structured CC@Zn@Li/Ag anode exhibited superior cycling stability and rate capability.We believe that this novel design on the Janus-structured Li anode can advance the development of safe and durable Limetal batteries.展开更多
Partner selection is an active research topic in agile manufacturing and supply chain management. In this paper, the problem is described by a 0-1 integer programming with non-analytical objective function. Then, the ...Partner selection is an active research topic in agile manufacturing and supply chain management. In this paper, the problem is described by a 0-1 integer programming with non-analytical objective function. Then, the solution space is reduced by defining the inefficient candidate. By using the fuzzy rule quantification method, a fuzzy logic based decision making approach for the project scheduling is proposed. We then develop a fuzzy decision embedded genetic algorithm. We compare the algorithm with tranditional methods. The results show that the suggested approach can quickly achieve optimal solution for large size problems with high probability. The approach was applied to the partner selection problem of a coal fire power station construction project. The satisfactory results have been achieved.展开更多
基金supported by Natural Science Foundation of Jiangsu Province of China (No.BK20170982)the National Natural Science Foundation of China(No.51601080)
文摘Herein,AgLi1/3Sn2/3O2 with delafossite structure was prepared by treating the layered compound Li2 SnO3 with molten AgN03 via ion exchange of Li^+for Ag^+.The structure characterization and the electrochemical performance of AgLi1/3Sn2/3O2 was thoroughly investigated.AgLi1/3Sn2/3O2 is found to possess stacking lamellar morphology,which means small electrochemical impedance and so facilitates charge transfer kinetics during the cycling.Compared with Li2 Sn03,due to the introducing of excellent electrical conductivity of silver,AgLi1/3Sn2/3O2 exhibits improved electrochemical performance in terms of capacity,cycling stability and coulombic efficiency.The results show AgLi1/3Sn2/3O2 presents favorable specific capacity of 339 mAh/g at current density of 200 mA/g after 50 cycles and initial coulombic efficiency of 96%.Exsitu XRD analysis revealed the reaction mechanism of AgLi1/3Sn2/3O2 as an anode for lithium ion batteries.
基金supported financially by the National Key Research and Development Program of China(grant no.2021YFB2400202)the National Natural Science Foundation of China(grant no.52104313)+1 种基金the Key Research and Development Plan of Shaanxi(grant no.2024GH-YBXM-11)the Foshan Science and Technology Innovation Team Project(grant no.1920001004098).
文摘Lithium(Li)dendrite formation/evolution with its disastrous safety issues has been challenging in high-energy Li-metal batteries.The detrimental Li dendrite is primarily initiated by an inhomogeneous distribution of current density that results in uncontrollable Li deposition in the vertical direction.To suppress the Li dendrite formation through selective Li infusion and uniform Li deposition,a unique Janus-structured surface consisting of Zn@Li layer and Ag layers was fabricated on carbon cloth(CC)by step-wise magnetron sputtering.The lower-half Zn layer,enabling selective Li infusion and the rational formation of a Zn@Li layer,was able to regulate the loading amounts of Li metal.Simultaneously,the upper-half lithiophilic Ag layer and derived AgLi layer prevented the vertical Li growth due to a uniform Li deposition.Importantly,the bifunctional surface design guaranteed a sustainable exposure of lithiophilic sites upon Li nucleation/evolution.Interestingly,the symmetrical cells and full cells utilizing the Janus-structured CC@Zn@Li/Ag anode exhibited superior cycling stability and rate capability.We believe that this novel design on the Janus-structured Li anode can advance the development of safe and durable Limetal batteries.
基金This work was partly supported by the National Natural Science Foundation of China (Grant Nos.69974039, 60084003) and the National High-Tech Program (Grant No. 863-511-9844-011) of China and partly by the Hong Kong Polytechnic University research grant(G
文摘Partner selection is an active research topic in agile manufacturing and supply chain management. In this paper, the problem is described by a 0-1 integer programming with non-analytical objective function. Then, the solution space is reduced by defining the inefficient candidate. By using the fuzzy rule quantification method, a fuzzy logic based decision making approach for the project scheduling is proposed. We then develop a fuzzy decision embedded genetic algorithm. We compare the algorithm with tranditional methods. The results show that the suggested approach can quickly achieve optimal solution for large size problems with high probability. The approach was applied to the partner selection problem of a coal fire power station construction project. The satisfactory results have been achieved.
