Recycling of spent lithium-ion batteries is extremely urgent with their increasing decommission. In this work, eutectic molten salts of LiOH–Li2CO3 used as lithium sources for direct regeneration of LiNi0.5Co0.2Mn0.3O2 were developed. Based on the phase diagram of LiOH and Li2CO3, the effects of different lithium sources on material regeneration have been investigated. The cathode materials regenerated with eutectic molten salts have high capacity, good cycling performance, and rate performance. The discharge capacities during the 1st and 200th cycles at 1 C are 146.3 and 130.3 mA h g–1, respectively, and the capacity retention rate reaches 89.06%. Using the combined X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS) analysis, the original layered structure of spent cathode materials was restored. Therefore, the eutectic molten salt of LiOH–Li2CO3 is feasible for direct regeneration of spent cathode materials.

The reaction sintering of equimolar mixtures of ZnO and A12O3 powders was investigated as a function of primary processing parameters such as the temperature, heating rate, green density, and particle size. The powder mixtures were prepared by two different methods. In one method, the ZnO and A12O3 powders were ball‐milled. In the other method, the ZnO powder was chemically precipitated onto the A12O3 particles dispersed in a solution of zinc chloride. The sintering characteristics of the compacted powders prepared by each method were compared with those for a prereacted, single‐phase powder of zinc aluminate, ZnAl2O4. The chemical reaction between ZnO and A12O3 occurred prior to densification of the powder compact and was accompanied by fairly large expansion. The mixing procedure had a significant effect on the densification rate during reaction sintering. The densification rate of the compact formed from the ball‐milled powder was strongly inhibited compared to that for the single‐phase ZnAl2O4 powder. However, the densification rate of the compact formed from the chemically precipitated mixture was almost identical to that for the ZnAl2O4 powder. The difference in sintering between the ball‐milled mixture and the chemically precipitated mixture is interpreted in terms of differences in the microstructural uniformity of the initial powder compacts resulting from the different preparation procedures.

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We herein describe a palladium‐catalyzed three‐component coupling of internal enamides, arylboronic acids, and Selectfluor to access the chiral β‐fluoroaminated moiety with up to 99 % ee. The prefunctionalized oxazolidinone substituted alkene enables the expedient construction of two vicinal stereocenters with excellent regio‐, diastereo‐, and enantioselectivities. The synthetic application is exhibited by selective transformation of the product into various vicinal benzylic fluoride derivatives.

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The miniaturization of power sources is important for meeting the requirements of low power, mass and volume for nano-or microelectronics and MEMS devices. In this paper a dexterous microfabrication process was developed for preparing microscale solid-state lithium batteries. The active size of a single microbattery is 500 μm × 500 μm and its thickness is 1.5 μm. LiCoO 2 films prepared by RF sputtering, then annealed at moderate temperature (500 • C), were employed as a cathode electrode, and LiPON and Al films were used as a solid electrolyte and an anode electrode, respectively. An individual microbattery delivers a capacity of about 17 nAh at a current of 5 nA at the initial cycles, and can be operated at as high as 40 nA discharge current.

With Et3N·3HF as the fluorination reagent, (IPr)CuF-catalyzed α-site regiocontrolled trans-hydrofluorination of ynamides has been achieved, affording (Z)-α-fluoroenamides in moderate to excellent yields. It was interesting to note that the regioselectivity of the reaction is reversed to that observed in the (Ph3P)3CuF-catalyzed hydrofluorination of ynamides. Additionally, a variety of different ynamides including oxazolidinonyl-, imidazolyl-, and N-sulfonyl ynamides were suitable for the reaction system and the subsequent oxidation of the fluorinated products enables a convenient synthesis to α-fluoroimides.