A novel low-cost aluminum–graphite dual-ion battery is reported. The battery shows a reversible capacity of ≈100 mAh g⁻¹ and a capacity retention of 88% after 200 charge–discharge cycles. A packaged aluminum–graphite battery is estimated to deliver an energy density of ≈150 Wh kg⁻¹ at a power density of ≈1200 W kg⁻¹, which is ≈50% higher than most commercial lithium ion batteries.

g-C₃N₄-based heterostructured photocatalysts have become research hotspots for their greatly enhanced charge carrier separation efficiency and photocatalytic performance. g-C₃N₄-based conventional type II heterojunction, g-C₃N₄-based Z-scheme heterojunction, g-C₃N₄-based p–n heterojunction, g-C₃N₄/metal heterostructure, and g-C₃N₄/carbon heterostructure have been widely reported in recent years. This review summarizes the design principles, preparation methods, charge transfer mechanism, and photocatalytic applications of these g-C₃N₄-based heterostructured photocatalysts.

Triboelectric nanogenerators (TENG), which utilize the universal triboelectrification for harvesting ambient and biological mechanical energy, has attracted worldwide interest and undergone exponential growth since its invention in 2012. This article reviews the fundamentals and applications of TENG as a foundation of the energy for the new era, and proposes a road map for its research and commercialization in the next decade.

A detailed discussion on the various aspects of the lithium-ion battery industry is presented. From raw material cost breakdowns to government mandates, to a brief discussion on the future of Li-based energy storage systems, the authors draw a clear picture of the high level aspects of this industry.

Many new nanomaterials show electrochemical behavior in between the classic types of electrode materials, making their classification difficult. Incorrect characterization and data reporting on these materials can mislead members of the energy storage research community, and it is the shared responsibility of researchers in the field to follow rigorous reporting methodologies to ensure published results are accurate and reliable.