Über die Adsorption in Lösungen

A review of rechargeable batteries for portable electronic devices

Over the past two decades, a series of aqueous rechargeable metal-ion batteries (ARMBs) have been developed, aiming at improving safety, environmental friendliness and cost-efficiency in fields of consumer electronics, electric vehicles and grid-scale energy storage. However, the notable gap between ARMBs and their organic counterparts in energy density directly hinders their practical applications, making it difficult to replace current widely-used organic lithium-ion batteries. Basically, this huge gap in energy density originates from cell voltage, as the narrow electrochemical stability window of aqueous electrolytes substantially confines the choice of electrode materials. This review highlights various ARMBs with focuses on their voltage characteristics and strategies that can effectively raise battery voltage. It begins with the discussion on the fundamental factor that limits the voltage of ARMBs, i.e., electrochemical stability window of aqueous electrolytes, which decides the maximum-allowed potential difference between cathode and anode. The following section introduces various ARMB systems and compares their voltage characteristics in midpoint voltage and plateau voltage, in relation to respective electrode materials. Subsequently, various strategies paving the way to high-voltage ARMBs are summarized, with corresponding advancements highlighted. The final section presents potential directions for further improvements and future perspectives of this thriving field.

Voltage issue of aqueous rechargeable metal-ion batteries

To keep pace with the increasing pursuit of portable and wearable electronics, it is urgent to develop advanced flexible power supplies. In this context, Zn-ion batteries (ZIBs) have garnered increasing attention as favorable energy storage devices for flexible electronics, owing to the high capacity, low cost, abundant resources, high safety, and eco-friendliness. Extensive efforts have been devoted to developing flexible ZIBs in the last few years. This work summarizes the recent achievements in the design, fabrication, and characterization of flexible ZIBs. Representative structures, such as sandwich and cable type, are particularly highlighted. Special emphasis is put on the novel design of electrolyte and electrode, which aims to endow reliable flexibility to the fabricated ZIBs. Moreover, current challenges and future opportunities for the development of high-performance flexible ZIBs are also outlined.

Flexible Zn-Ion Batteries: Recent Progresses and Challenges.

High energy-power Zn-ion hybrid supercapacitors enabled by layered B/N co-doped carbon cathode

Biomass-derived activated carbons for the removal of pharmaceutical mircopollutants from wastewater: A review

Solid-state flexible aqueous Zn-ion battery was fabricated with nanostructured polyaniline–cellulose papers as the cathode and Zn-grown graphite papers as the anode. The separator was a flexible gel electrolyte with high ionic conductivity, based on cellulose nanofibers. The Zn-ion battery exhibited energy density of 117.5 and 67.8 mW·h/g at power density of 0.16 and 3.34 W/g, respectively (estimated from total active mass of both cathode and anode). The energy density of the Zn-ion battery was much higher than that of asymmetric supercapacitors with aqueous electrolytes, while maintaining a comparable power density. Meanwhile, good cyclic stability was achieved with a high capacity retention of 84.7% after 1000 charge/discharge cycles at a current density of 4 A/g. More importantly, specific capacity changed little under mechanical bending, and there was only 9% loss after 1000 bending cycles. The solid-state flexible Zn-ion battery has great potential as an energy-storage device for flexible displays an...

Jinbo Ouyang

Papers

Biomass-derived activated carbons for the removal of pharmaceutical mircopollutants from wastewater: A review

Nanostructured Polyaniline–Cellulose Papers for Solid-State Flexible Aqueous Zn-Ion Battery

Solubility and solution thermodynamics of sorbic acid in eight pure organic solvents

Functionalization of mesoporous Fe3O4@SiO2 nanospheres for highly efficient U(VI) adsorption

Macroporous ion-imprinted chitosan foams for the selective biosorption of U(VI) from aqueous solution.