The safety hazards and low Coulombic efficiency originating from the growth of lithium dendrites and decomposition of the electrolyte restrict the practical application of Li metal batteries (LMBs). Inspired by the low cost of low concentration electrolytes (LCEs) in industrial applications, dual‐salt LCEs employing 0.1 m Li difluorophosphate (LiDFP) and 0.4 m LiBOB/LiFSI/LiTFSI are proposed to construct a robust and conductive interphase on a Li metal anode. Compared with the conventional electrolyte using 1 m LiPF6, the ionic conductivity of LCEs is reduced but the conductivity decrement of the separator immersed in LCEs is moderate, especially for the LiDFP–LiFSI and LiDFP–LiTFSI electrolytes. The accurate Coulombic efficiency (CE) of the Li||Cu cells increases from 83.3% (electrolyte using 1 m LiPF6) to 97.6%, 94.5%, and 93.6% for LiDFP–LiBOB, LiDFP–LiFSI, and LiDFP–LiTFSI electrolytes, respectively. The capacity retention of Li||LiFePO4 cells using the LiDFP–LiBOB electrolyte reaches 95.4% along with a CE over 99.8% after 300 cycles at a current density of 2.0 mA cm−2 and the capacity reaches 103.7 mAh g−1 at a current density of up to 16.0 mA cm−2. This work provides a dual‐salt LCE for practical LMBs and presents a new perspective for the design of electrolytes for LMBs.

A novel strategy for preparing highly sensitive, molecularly imprinted sensors based on enzyme amplifiers was proposed for oxytetracycline (OTC) determination. A molecularly imprinted polymer (MIP) film was used as an artificial antibody to interact with OTC and horseradish peroxidase-labeled OTC (HRP-OTC). Oxytetracycline was determined according to the competition reaction. The molecularly imprinted sensor was characterized by alternating current (ac) impedance spectroscopy, differential pulse voltammetry (DPV), and cyclic voltammetry (CV). The DPV technique was performed to verify the voltammetric behavior of the molecularly imprinted sensor. At the concentration of 0-1 x 10(-7) mol/L, OTC could be determined with a detection limit of 6.49 x 10(-10) mol/L. The MIP artificial immunosensor showed high sensitivity, selectivity, and reproducibility. Determination of OTC in samples showed good recovery.

No abstract

No abstract

No abstract