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High electrochemical stability and safety make Na+ superionic conductor (NASICON)-class cathodes highly desirable for Na-ion batteries (SIBs). However, their practical capacity is limited, leading to low specific energy. Furthermore, the low electrical conductivity combined with a decline in capacity upon prolonged cycling (>1000 cycles) related to the loss of active material-carbon conducting contact regions contributes to moderate rate performance and cycling stability. The need for high specific energy cathodes that meet practical electrochemical requirements has prompted a search for new materials. Herein, we introduce a new carbon-coated Na3VFe0.5Ti0.5(PO4)3 (NVFTP/C) material as a promising candidate in the NASICON family of cathodes for SIBs. With a high specific energy of ∼457 Wh kg−1 and a high Na+ insertion voltage of 3.0 V versus Na+/Na, this cathode can undergo a reversible single-phase solid-solution and two-phase (de)sodiation evolution at 28 C (1 C = 174.7 mAh g� ....
A historic bridge in Portland, Oregon, was shut down Monday morning after a derailed train car was seen leaning against a bridge support. Two cars fully derailed on a Union Pacific line on the east side of the century-old Steel Bridge. ....
“That is far from the truth. Almost anywhere in Mumbai, a building collapse poses danger to others in the vicinity, including passersby. That is the larger interest to be served,” said Justices Gautam Patel and Kamal Khata on Tuesday. ....
Have you ever wondered how to make a piece of art out of a dollar bill that not only looks good, but also serves a purpose? Make a tree out of folded dollar bills, which can be both eye-catching and meaningful? Dollar Bill Money Trees have taken the crafting world by storm in recent months, […] ....