Fluorescent CdTe nanocrystal–polymer transparent composites have been fabricated by a combination of aqueous synthesis of nanocrystals, styrene extraction using polymerizable surfactants, and radical polymerization of monomer mixture containing composite nanocrystals. The Figure shows the photoluminescence of transparent CdTe–polymer composites excited by an ultraviolet lamp.

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/aenm.201703252. Low-Temperature BatteriesIn order to substitute the currently market-dominant lithiumion batteries (LIBs), which would become unaffordable to consumers due to the low abundance and uneven distribution of Li resources in the Earth's crust and therefore the higher and higher prices, sodium-based batteries (SBBs) have drawn great attentions of energy-storage scientists. [1][2][3][4][5] Traditionally, SBBs are the molten-sodium batteries, mainly including the high temperature (high-T) sodium-sulfur and sodium-metal halide (ZEBRA) batteries, which are built with a solid electrolyte of

Transition metal selenides have been attracting significant attention owing to their high conductivity and theoretical capacity. In this article, the N-doped carbon (NDC)-coated Ni 1.8 Co 1.2 Se 4 nanoparticles encapsulated in NDC nanoboxes are prepared from the bi-metal organic framework (Ni 3 [Co(CN) 6 ] 2 ·6H 2 O, Ni-Co BMOF) after the selenization reaction and carbon coating. When used as an anode material for sodium-ion batteries, the prepared anode material delivers excellent rate performance (211 and 153 mA h g −1 at ultrahigh current densities of 30 and 50 A g −1 , respectively) and good cycling performance (379.3 mA h g −1 at 0.5 A g −1 after 100 cycles). More importantly, it also exhibits superior sodium-ion full cell (SIFC) performance when coupled with a high-voltage Na 3 V 2 (PO 4 ) 2 O 2 F cathode recently self-made by the authors. The fabricated SIFC gives an energy density up to 227 W h kg −1 and the capacity retention of above 97.6% even after 60 cycles at 0.4 A g −1 in a voltage range of 1.2-4.3 V at 25 °C. Moreover, the low-temperature (from 25 to −25 °C) Na-storage performance of the fabricated SIFC is also studied.