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Stress evolution during cycling of alloy-anode solid-state batteries

Control over the interplay between electrochemical reactions and the mechanical behavior of solid-state batteries is critical to improve performance. This study links the electrochemical behavior of alloy-anode-based solid-state batteries to stack pressure during charge and discharge, showing that the electrode architecture and active material have...

Reduced non-radiative charge recombination enables organic photovoltaic cell approaching 19% efficiency

Suppressing the non-radiative energy loss by optimizing the exciton behaviors in PBDB-TF:eC9-based organic photovoltaic (OPV) cells is demonstrated in this work. The exciton diffusion length and exciton lifetime in the active layer based on PBDB-TF:eC9 are enhanced via introducing HDO-4Cl, resulting in the obvious reduction in the non-radiative charge...

Photopatternable hydroxide ion electrolyte for solid-state micro-supercapacitors

One potential direction for achieving better integration with miniaturized electronics is to develop a photopatternable electrochemical energy storage system. To meet this objective, a photopatternable hydroxide-conducting electrolyte was developed via covalent grafting of polymerizable cations onto photopatternable polymer hosts, followed by anion...

Ultrastable aqueous phenazine flow batteries with high capacity operated at elevated temperatures

This work reports a high-capacity aqueous organic redox-flow battery (AORFB) that can be operated at elevated temperature with no capacity fade. The chemical and electrochemical properties of the energy-storage materials are carefully modulated through effective molecular design. The developed AORFB presented in this work potentially enables robust...

Turning water into a protonic diode and solar cell via doping and dye sensitization

Bipolar ion-exchange membranes serve as scaffolds for dopants that, when infiltrated with water, release protons and hydroxides as mobile-charge-carrier species and exhibit protonic diode behavior. Sensitization of current-rectifying bipolar membranes to visible light through covalent modification with photoacid dye molecules resulted in the observation...

Techno-economic analysis of long-duration energy storage and flexible power generation technologies to support high-variable renewable energy grids

Solar and wind energy are being rapidly integrated into electricity grids around the world. As renewables penetration increases beyond 80%, electricity grids will require long-duration energy storage or flexible, low-carbon electricity generation to meet demand and help keep electricity prices low. Here, we evaluate the costs of applicable technologies...

Small-molecular donor guest achieves rigid 18.5% and flexible 15.9% efficiency organic photovoltaic via fine-tuning microstructure morphology

Two small molecular donors, G17 and G19, were designed and synthesized. The G17-containing sp3-carbon π-bridge features an amorphous orientation, whereas the silicon-substituted G19 exhibits an extremely ordered edge-on orientation. When doped into D18-Cl:Y6 host system, the G19-based ternary device showed a largely improved power conversion efficiency...

Toward carbon-neutral electricity and mobility: Is the grid infrastructure ready?

A key challenge in the ambitious carbon neutral transition lies in the scale and speed of this transformation. Is today’s electric infrastructure ready to facilitate such an ambitious decarbonization effort? If not, how should investments be prioritized to leverage feedback from vehicle electrification and further expand the electric infrastructure?

Cutting through the noise on negative emissions

Claims that negative-emissions technologies (NETs) present a risky or high-stakes gamble to climate change mitigation are largely based on the results of integrated assessment models. However, such models are fraught with limitations. Bottom-up approaches are more reliable to assess the potential role for NETs in mitigation portfolios. We introduce...

Dual-anion ionic liquid electrolyte enables stable Ni-rich cathodes in lithium-metal batteries

Exploiting the high-energy density of lithium metal as a negative electrode for lithium batteries is considered a prerequisite to satisfy the continually increasing demand for extended driving range of electric vehicles and fully electrify our mobility and transportation. However, such lithium-metal batteries face critical safety and life-span concerns....

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