Rechargeable Zn-HO hydrolysis battery for hydrogen storage and production.

Reactive metals hydrolysis offers significant advantages for hydrogen storage and production. However, the regeneration of common reactive metals (e.g.

Improving the Initial Coulombic Efficiency of Sodium-Storage Antimony Anodes via Electrochemically Alloying Bismuth.

Improving cycling stability while maintaining a high initial Coulombic efficiency (ICE) of the antimony (Sb) anode is always a trade-off for the design of electrodes of sodium-ion batteries (SIBs). Herein, we prepare a carbon-free SbBi anode with an ICE of 87.1% at 0.

Anode electrolysis of sulfides.

Traditional sulfide metallurgy produces harmful sulfur dioxide and is energy intensive. To this end, we develop an anode electrolysis approach in molten salt by which sulfide is electrochemically split into sulfur gas at a graphite inert anode while releasing metal ions that diffuse toward and are deposited at the cathode. The anodic splitting dictates the "sulfide-to-metal ion and sulfur gas" conversion that makes the reaction recur continuously.

Hydrometallurgical recovery of spent cobalt-based lithium-ion battery cathodes using ethanol as the reducing agent.

A reducing agent can reduce Co to Co in LiCoO, thus increasing the leaching efficiency and extraction rate of Co-based cathode materials from spent lithium-ion batteries (LIBs). Herein, ethanol was employed as the reducing agent to leach LiCoO obtained from LIBs in a sulfuric acid solution. The effects of operating temperatures (50-90 °C), dosage of ethanol (0-20 vol%), concentration of sulfuric acid (2-6 mol/L), and solid/liquid ratio (10-40  g/L) on the leaching efficiency of LiCoO were investigated.

Recovery and regeneration of LiCoO-based spent lithium-ion batteries by a carbothermic reduction vacuum pyrolysis approach: Controlling the recovery of CoO or Co.

An environmentally benign vacuum pyrolysis (VP) approach is employed to recover Li and Co from spent LiCoO-based lithium-ion batteries (LIBs). First, the electroactive materials were separated from the current collector by the VP method from 623 to 823 K with an attempt to choose an appropriate temperature. Then, the as-received cathode materials were mixed with different amounts of graphite from the anode to selectively convert LiCoO to Co or CoO and LiCO by carbothermic reduction under vacuum and at 873 to 1273 K.

Extraction of Co and LiCO from cathode materials of spent lithium-ion batteries through a combined acid-leaching and electro-deoxidation approach.

Recycling of the spent LIBs to extract Li and Co not only offers raw materials for batteries but also lays a sustainable way for battery development. Herein, we adopt a route combining hydrometallurgical and pyro-electrochemical routes to extract LiCO and Co powder from the spent LIBs of cell phones. The LiCoO-based cathode materials were firstly dissolved in HSO solution containing HO as the reductant, and the optimal conditions for attaining a high extraction rate of 99% were studied.