An oil and gas well in the sea

Read our May issue

This month we look at kesterite solar cells, Li-dendrite suppression in batteries, multiple exciton generation in photocatalytic water splitting, energy services and gender empowerment, and more.

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    • Supercapacitors have made significant strides in electrochemical performance improvements, yet integrating them into structures capable of withstanding mechanical loads has proven to be a challenge. Now, a supercapacitor based on a high-strength solid electrolyte is shown to have a high load-bearing capacity with negligible capacity loss during long-term cycling.

      • Yachao Zhu
      • Jie Deng
      • Olivier Fontaine
      News & Views
    • The performance of kesterite solar cells is limited by the formation of secondary phases and defects during the growth of their photovoltaic absorbers. New research shows that a tailored partial pressure of selenium leads to less-defective kesterite without the formation of intermediate phases, enabling 13.8%-efficiency solar cells.

      • Xiaojing Hao
      News & Views
    • The lack of long-term cyclability poses a serious challenge for lithium metal anodes. Now, a lithium anode coated with a side-chain-engineered polymer — which contains salt-philic and solvent-phobic moieties — is reported to regulate the electrode–electrolyte interphase, thereby prolonging its cycle life.

      • Min-Sik Park
      • Jung Ho Kim
      News & Views
    • Hydrogen generated by sunlight could play a major role in a low-carbon future, but high-efficiency demonstrations have been limited mostly to very small scales. New research now evaluates a complete system that generates 0.5 kg of hydrogen per day with 20% device (5.5% system) efficiency while showing the benefits of coupled light absorption and water electrolysis.

      • Todd G. Deutsch
      News & Views
    • A photocatalyst comprising CdTe quantum dots and V-doped In2S3 exhibits a strong interfacial built-in electric field and an interfacial trapping state that provide sufficient driving force for extracting excitons and separating carriers during photocatalytic water splitting. Multiple excitons can be generated per photon and exploited to achieve an internal quantum efficiency of more than 100% for hydrogen production.

      Research Briefing
Thomas Phillips, Springer Nature

Clean energy innovation

On 21–23 September, Mission Innovation and the Clean Energy Ministerial will undertake joint ministerial meetings in Pittsburgh, USA for the Global Clean Energy Action Forum.