Dual-additive-based electrolyte design for aqueous zinc ion batteries with high plating/stripping efficiency.

A dual-additive-based aqueous electrolyte was designed with a pH-buffering additive (Zn(OAc)) and an electrostatic shielding additive (TMAOAc) for high Zn plating/stripping efficiency. The buffering pair, OAc/HOAc, can stabilize the pH value to suppress side hydrogen evolution reactions. Meanwhile, TMA acts as a competitive cation being preferentially adsorbed on the uneven surface of the Zn anode and exerts an electrostatic shielding effect to facilitate flat Zn deposition.

High Power- and Energy-Density Supercapacitors through the Chlorine Respiration Mechanism.

Supercapacitor represents an important electrical energy storage technology with high-power performance and superior cyclability. However, currently commercialized supercapacitors still suffer limited energy densities. Here we report an unprecedentedly respiring supercapacitor with chlorine gas iteratively re-inspires in porous carbon materials, that improves the energy density by orders of magnitude.

Serial Interval and Reproductive Number of COVID-19 Among 116 Infector-infectee Pairs - Jingzhou City, Hubei Province, China, 2020.

What Is Already Known About This Topic?: The key epidemiological parameters including serial interval, basic reproductive number ( ), and effective reproductive number ( ) are crucial for coronavirus disease 2019 (COVID-19) control and prevention. Previous studies provided different estimations but were often flawed by some limitations such as insufficient sample size and selection bias.

What Is Added By This Report?: In this study, a total of 116 infector-infectee pairs meeting strict inclusion criteria were selected for analysis.