Lithiophilic hollow Co[Co(CN)] embedded carbon nanotube film for dendrite-free lithium metal anodes.

Lithium metal is considered to be an ideal anode material due to its ultra-high theoretical capacity and extremely low electric potential. Unfortunately, the infinite volume expansion and unregulated formation of lithium dendrites in the plating/stripping process restrict its practical utilization. Herein, we designed a hollow Co[Co(CN)] (CoCoPBA) embedded high-conductivity carbon film as a three-dimensional (3D) lithiophilic current collector (h-CoCoPBAs@SWCNT).

Boosting oxygen evolution reaction activity and durability of phosphate doped Ni(OH)/FeOOH hierarchical microtubes by morphology engineering and reconstruction strategy.

Developing electrocatalysts with remarkable activity and durability is significant for efficient oxygen evolution reaction (OER). Herein, we designed phosphate doped Ni(OH)/FeOOH hierarchical microtubes (denoted as PO-Ni(OH)/FeOOH HMTs), obtained by phosphate doped NiFe Prussian blue analogue hierarchical microtubes (denoted as P-NF-PBA HMTs) completely reconstructing in OER process. PO-Ni(OH)/FeOOH HMTs possess an extremely low overpotential of 237 mV at 30 mA cm in alkaline electrolyte with the Tafel slope of 35 mV dec, and the catalysts can maintain excellent durability for 100 h at 30 mA cm.

Embedding FeC and FeN on a Nitrogen-Doped Carbon Nanotube as a Catalytic and Anchoring Center for a High-Areal-Capacity Li-S Battery.

The biggest obstacles of putting lithium-sulfur batteries into practice are the sluggish redox kinetics of polysulfides and serious "shuttle effect" under high sulfur mass loading and lean-electrolyte conditions. Herein, FeC/FeN@nitrogen-doped carbon nanotubes (NCNTs) as multifunctional sulfur hosts are designed to realize high-areal-capacity Li-S batteries. The FeN and FeC particles attached to NCNT can promote the conversion of polysulfides.