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The feasibility of heavy battery electric trucks

We show that the competitiveness of heavy battery electric trucks can improve with larger trucks if fast charging becomes available and that conclusions on electric trucks are sensitive to technology improvements. With a shorter range and more frequent charging, savings from electrification scale faster than do the costs of electrification and the negative...

Charge-carrier-mediated lattice softening contributes to high zT in thermoelectric semiconductors

All good thermoelectrics are heavily doped semiconductors in which the sound velocity vs and, therefore, the lattice thermal conductivity κL are traditionally assumed to be independent of electronic doping. We show electronic doping directly suppresses the vs in eight thermoelectric semiconductors. The observed lattice softening is sufficient to reduce...

Rotational energy harvesting for self-powered sensing

This paper reviews the state-of-the-art progress in rotational energy harvesting in available energy characteristics, harvester categories, and applications. Unique mechanisms, such as those using gravity and centrifugal force combined with other nonlinear mechanisms, are discussed and characterized. Wearable or implantable devices, automotive, rotating...

Solar photovoltaics is ready to power a sustainable future

Thanks to fast learning and sustained growth, solar photovoltaics (PV) is today a highly cost-competitive technology, ready to contribute substantially to CO2-emissions mitigation. Here, we review the factors that lie behind the historical cost reductions of solar PV and identify innovations in the pipeline that could contribute to maintaining a high...

Distributed and localized cooling with thermoelectrics automated on-demand heating and cooling could transform energy use

Thermoelectrics could play an important role in transforming energy use by enabling distributed and localized heating and cooling. Heating or cooling only when and where it is needed could dramatically reduce energy use by limiting HVAC only to locations where it is in immediate need. Although the performance of thermoelectric Peltier coolers is competitive...

Polysilicon passivated junctions: The next technology for silicon solar cells?

The integration of polysilicon (poly-Si) passivated junctions into crystalline silicon solar cells is poised to become the next major architectural evolution for mainstream industrial solar cells. This perspective provides a generalized description of poly-Si junctions and their potential to transform the silicon PV industry. It covers the fundamental...

Bubble growth and departure modes on wettable/non-wettable porous foams in alkaline water splitting

Electrochemical gas-evolving reactions have been widely used for industrial energy conversion and storage processes. Bubbles generated on electrodes create extra transport resistance and induce undesired overpotential. Therefore, the fundamental understanding of bubble dynamics on gas-evolving electrodes is of particular importance. In this work, the...

Lead-free tin perovskite solar cells

Perovskite solar cells (PSCs) have emerged as one of the third-generation photovoltaic technologies. However, the toxicity issue of lead in perovskite absorbers hinders their large-scale production. Thus, developing lead-free tin PSCs becomes an important solution to overcome this challenge. Here, a comprehensive review on the progress of tin PSCs based...

Address the “alkalinity problem” in CO2 electrolysis with catalyst design and translation

Sustainable transformation of CO2 into chemicals (CO2RR) is promising for renewable energy conversion. Recently, alkaline flow cells have been extensively used for CO2RR because of their high performance; however, continuously flowing bulk alkaline electrolyte is ultimately not sustainable. We highlight catalyst design as a fruitful approach to address...

An overlooked issue for high-voltage Li-ion batteries: Suppressing the intercalation of anions into conductive carbon

The anion intercalation into cathode conductive carbon is revealed as an overlooked yet critical issue for a stable, high-voltage rechargeable battery. By suppressing the anion intercalation with a concentrated sulfolane-based electrolyte, an extremely stable 5.2 V-class Li-ion battery was successfully achieved.

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