4 results about "Anion intercalation" patented technology

The invention relates to the technical field of lithium ion battery material recovery and regeneration, and discloses a preparation method of a regenerated graphite negative electrode material based on molten salt electrochemical repair and the regenerated graphite negative electrode material. The preparation method of the regenerated graphite negative electrode material comprises the following steps: S1, discharging and disassembling: discharging, disassembling, crushing and sorting a waste lithium ion battery to obtain a negative electrode material mixture containing graphite; s2, pretreatment: carrying out pretreatment to obtain pretreated graphite; s3, electrochemical repair of molten salt: taking the pretreated graphite as a cathode, placing the pretreated graphite in a molten salt electrolyte containing CaCl2, taking an inert electrode as an anode, applying a voltage lower than the potential of anion intercalation of graphite in the molten salt system to the cathode, and carrying out constant-voltage electrolysis; and S4, post-treatment: after electrolysis is completed, washing and drying to obtain the regenerated graphite negative electrode material. The prepared regenerated graphite negative electrode material is low in metal impurity content, and the first coulombic efficiency and the like are improved.

This invention relates to a low-spin Fe 3+ The preparation method of the iron-rich NiFe-LDHs electrocatalyst includes the following steps: (1) dissolving amino acids in an aqueous solution containing triethylamine to obtain solution A; (2) dissolving nickel salt and iron salt in a methanol solution to obtain solution B; (3) dissolving an organic base in a methanol solution to obtain solution C; (4) adding solution A to solution B and mixing to obtain solution D; then adding solution C to solution D to carry out a co-precipitation reaction, and finally centrifuging and vacuum drying to obtain the electrocatalyst. This invention uses amino acid pre-complexation and organic base micro-regulation to achieve an amino acid anion intercalation strategy. By utilizing the strong interaction between amino acids and the metal center of the layer, it not only suppresses the generation of impurity phases under high Fe content, but also expands the interlayer spacing and introduces lattice defects, inducing Fe in NiFe-LDHs. 3+ The spin configuration partially changes.

The invention discloses a magnesium-based dual-ion battery and a preparation method and application thereof.According to the magnesium-based dual-ion battery, a battery configuration with magnesium metal as a negative electrode and a graphite material as a positive electrode is constructed, and a cation intercalation behavior in a traditional magnesium battery is replaced with an anion intercalation mechanism; the collaborative design of the ionic liquid electrolyte and the mixed magnesium salt is specifically adopted, the magnesium deposition interface is effectively regulated and controlled, and the performance obviously superior to that of a traditional magnesium battery is achieved. Through the working mechanism of the dual-ion battery, the advantages of high working voltage of the graphite positive electrode and high capacity of the magnesium metal negative electrode are combined, and the wide electrochemical window of the ionic liquid electrolyte is utilized, so that long-life deposition can be realized under low overpotential; meanwhile, through high-capacity and high-rate intercalation reaction of anions in the graphite positive electrode, the problems of narrow voltage window, flammability and explosiveness, short cycle life, low positive electrode capacity, low positive electrode voltage and the like of the current magnesium ion battery are effectively solved.

The invention belongs to the technical field of battery technology, and provides a flame retardant, a priming coat and a preparation method thereof, and a positive plate, the flame retardant is an anion intercalation modified magnesium-aluminum layered double hydroxide; the interlayer spacing of the anion intercalation modified magnesium-aluminum layered double hydroxide is 0.76 to 3.1 nm. According to the flame retardant, magnesium-aluminum layered double hydroxide has a specific intercalation layer spacing through anion intercalation modification, the material layer spacing is increased, a difunctional nano barrier layer with flame retardance and ion conduction is constructed, and a traditional halogen-containing flame retardant is replaced. The flame retardant is prepared into priming coat slurry, coating of the slurry is completed through step drying, and the flame retardant is directionally arranged on the surface of a current collector through three different drying modes to achieve vertical orientation; compared with an ineffective distribution prime coat material in the prior art, the heat shrinkage rate of the prime coat mode is reduced, and the interface flame retardance is reduced.