Researchers have discovered "cometary organic matter" while studying samples from Ryugu, a near-Earth asteroid that was visited by Japan's Hayabusa 2 spacecraft in 2018. The mission returned samples to Earth in December 2020, giving scientists invaluable insights into the origins of life on Earth. Now, teams studying the samples have concluded that the sample's […]
Last week saw the long-awaited return of Tire Technology Expo in Hannover, Germany, providing the perfect opportunity for the tire industry to meet in [.]
Abstract
Sodium-selenium (Na-Se) batteries have aroused enormous attention due to the large abundance of the element sodium as well as the high electronic conductivity and volumetric capacity of selenium. In this battery system, some primary advances in electrode materials have been achieved, mainly involving the design of Se-based cathode materials. In this Review, the electrochemical mechanism is discussed, thus revealing the main challenges in Na-Se batteries. Then, the advances in the design of Se-based cathode materials for Na-ion storage are systemically summarized, classified, and discussed, including Se/carbon composite, Se/polar material/carbon composites, and hybrid SexSy alloys. Some potential strategies enabling the improvement of crucial challenges and enhancement of electrochemical performance are also proposed to provide guidelines for the enhancements of Na-ion storage. An outlook for future valuable research directions is proposed to understand more deeply the elect