Developing high-performance, safe, and flexible solid-state electrolytes (SSEs) for rechargeable solid-state zinc− air batteries (ZABs) is becoming increasingly crucial but remains fraught with tremendous challenges. Herein, a novel multinetwork cross-linked composite gel electrolyte (PVAA-Cellulose) was constructed by introducing poly(acrylic acid) (PAA) and ultrafine cellulose to the poly(vinyl alcohol) (PVA) gel electrolyte. By virtue of the extensive porous network and hydrogen bonding, the PVAA-Cellulose SSEs achieve optimal water retention, thermal stability, and high ionic conductivity of 123 mS cm −1 compared with PVAA (mixture of PVA and PAA). The investigation of the effects of different SSEs on zinc anodes after ZAB cycling reveals that PVAA-Cellulose SSE can effectively inhibit dendrite growth and oxidation byproduct generation on zinc anodes, which contributes to the long-term cycling stability of ZABs. As a result, solid-state ZABs assembled with PVAA-Cellulose SSEs possess a high power density of 74 mW cm −2 , a specific capacity of 724 mAh g Zn −1, and a long cycle stability of 54 h as well as the outstanding flexibility exhibited by the flexible ZAB devices.
In view of the complex procedure of nucleic acid extraction, there exists a huge challenge for the widespread use of point-of-care diagnostics for nucleic acid testing. To achieve point-of-care applications in a more rapid and cost-efficient manner, we designed a snake pipe-shaped microfluidic chip so as to accomplish reagents-prestored, time-saving, operation-simple nucleic acid extraction. All reagents needed for this process, including lysis buffer, wash buffer, elution buffer, and so on, were preloaded in the snake pipe and securely isolated by membrane valves, without the need for using any specialized equipment. By an integrated chip and a powerful ultrasonic, this device could complete virus nucleic acid extraction from sophisticated serum samples in less than 1 min. We used hepatitis B virus (HBV) and human immunodeficiency virus (HIV) mixed with different sources of serum as samples to be extracted. The coefficient of variation of HBV and HIV extraction on-chip was 1.32% and 2.74%, respectively, and there were no significant differences between on-chip and commercial instrument extraction (P > 0.05, α = 0.05) in different dilution ratios, which showed that the extraction device we established had excellent stability and sensitivity.
The composite catalyst with a novel construction of bimetallic phosphide FeNiP nanoparticles embedded in N, P double-doped carbon matrix was prepared. It was demonstrated to be a trifunctional catalyst that...
A microscopic optical potential (MOP) for 7Li without free parameter is obtained by folding the MOPs of its internal nucleons with their density distributions. An isospin-dependent nucleon MOP based on the Skyrme nucleon–nucleon effective interaction is used as the nucleon optical potential. Cluster model is employed to construct the internal wave function of 7Li and derive the density distributions of the internal nucleons. The 7Li MOP is used to calculate the elastic-scattering angular distributions and reaction cross sections for target nuclei from 27Al to 208Pb at incident energies up to 450 MeV. The results are compared with experimental data and the calculated results by a global phenomenological optical model potential. Generally the MOP can reproduce the experimental data reasonably well, and in many cases it is comparable to the global phenomenological optical potential.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.