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Rechargeable aqueous zinc‐ion batteries are considered as promising candidates for safe and green energy storage. Yet, Zn anodes still suffer from serious challenges. Herein, an effective cation‐sieve of polyethersulfone‐modified sulfonated polyether ether ketone is developed as protective coating layer of the Zn anodes. Cation‐only transmission and dense property of the layer can protect the Zn from active water and anions, inhibiting corrosion, hydrogen evolution reaction (HER), and passivation. Zincophilic property of the layer can homogenize Zn2+ flow, and promote uniform plating of Zn. Therefore, protected symmetric Zn||Zn cell can maintain as long as 5600 h with a low polarization at 1.0 mA cm−2 and 0.5 mAh cm−2, and still long as 800 h at 5.0 mA cm−2 and 5.0 mAh cm−2. It is found that not only the dendrites but also the popular existed passivation product of Zn4SO4(OH)6·5H2O can be inhibited effectively. In asymmetric Zn||Ti cells, average Coulombic efficiency can reach 98.2%, suggesting corrosion and HER are restrained effectively. Matched with MnO2 cathode, full cells using coated Zn exhibit much better cycling performance than that using bare Zn. Moreover, Zn4O3(SO4)·7H2O (ZSH)‐assisted reversible conversion mechanism between the ZSH and ZnxHyMnO2 is revealed through operando Raman. [ABSTRACT FROM AUTHOR]

MoO2/Mo2N hybrid nanobelts doped with gold nanoparticles (AuNPMoON) were synthesized via one-step thermal-treatment of MoO3 nanobelts and HAuCl4. AuNPMoON nanobelts with a width of ca. 200 nm and an Au content of 1.08 wt% prepared in the presence of HAuCl4 exhibited a higher specific capacitance of 348 F g−1 than those prepared in the absence of HAuCl4 (21 F g−1) at a current density of 0.5 A g−1. The influence of Au content on the electrochemical performance of AuNPMoON was investigated. For practical application, two types of supercapacitor devices, PANI☋☋AuNPMoON and AC☋☋AuNPMoON, were assembled. The PANI☋☋AuNPMoON device delivered an energy density of 10.64 W h kg−1, which is higher than that of the AC☋☋AuNPMoON device (8.11 W h kg−1). Meanwhile, the specific capacitance retentions were 87.8% and 85.5% for the PANI☋☋AuNPMoON and AC☋☋AuNPMoON devices after 2000 cycles, respectively. [ABSTRACT FROM AUTHOR]

Determination of phytate and phosphate by suppressed conductivity ion chromatography was investigated. Plant samples were extracted with 1% (mass fraction) trichloroacetic acid (TCA). After centrifugal settling, the supernatant was filtered with a 0.45 microm filter membrane before injected into the ion chromatographic system and detected by suppressed conductivity. The gradient eluent was composed of 0.22 mol/L sodium hydroxide solution, water and 50% (v/v) isopropyl alcohol solution. Phytate and phosphate were determined within 15 min, and no interference was found in the presence of fluorate, chlorate, nitrate, sulphate and TCA. Good linearities for phytate and phosphate were obtained in the ranges of 5-400 mg/L (r2 = 0.9994) and 5-500 mg/L (r2 = 0.9999), and the detection limits (S/N = 3) were 3.5 mg/L and 1.5 mg/L, respectively. The average recoveries for phytate and phosphate were 99.8% and 98.4%, and their relative standard deviations were 1.98% and 2.09%, respectively.