Synthesis of MnO-Sn cubes embedding in nitrogen-doped carbon nanofibers with high lithium-ion storage performance.

In this paper, a carbon nanofiber (CNF) hybrid nanomaterial composed of MnO-Sn cubes embedding in nitrogen-doped CNF (MnO-Sn@CNF) is synthesized through electrospinning and post-thermal reduction processes. It exhibits good electrochemical lithium-ion storage performance as the anode, such as high reversible capacity, outstanding cycle performance (754 mAh gat 1 A gafter 1000 cycles), and good rate capability (447 mAh gat 5 A g). The excellent electrochemical properties are derived from a unique nanostructure design.

Hierarchically Hollow and Porous NiO/NiCoO Nanoprisms Encapsulated in Graphene Oxide for Lithium Storage.

Engineering materials nanostructures is key for developing renewable energy technologies for lithium-ion batteries (LIBs) but remains a long-term research challenge. In this paper, heterostructured NiO/NiCoO nanoprisms with a hierarchically hollow cavity and porous framework are rationally designed and further encapsulated in graphene oxide (NiO/NiCoO@GO) as a highly efficient anode nanomaterial for LIBs. Heterostructured NiO/NiCoO hollow/porous nanoprisms are derived by the ionic exchange of Ni precursors with [Co(CN)] (CoNi-metal-organic framework (MOF)) and then annealed under air.

An efficient utilization of high chromium vanadium slag: Extraction of vanadium based on manganese carbonate roasting and detoxification processing of chromium-containing tailings.

A novelty roasting method with manganese carbonate (MnCO) as additive was carried out to separate and recover vanadium from high chromium vanadium slag (HCVS) efficiently. Vanadium tailings containing chromium was detoxified by carbon reduction and smelting to form Fe-Cr alloy. The whole process of HCVS utilization was analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM).