5results about How to "Dendrite suppression" patented technology

The invention discloses a low-temperature-resistant negative electrode zinc paste and a low-temperature alkaline zinc-manganese battery containing the zinc paste. The negative electrode zinc paste comprises the following components in parts by weight: 60-65 parts of zinc powder, 1-2 parts of a composite conductive agent, 0.1-0.3 part of a composite corrosion inhibitor and 35-38 parts of a low-temperature electrolyte; the low-temperature electrolyte comprises a multi-element nonionic surfactant system, a multi-element nano anti-freezing agent system and a mixed solution A, the 3.9 ohm discharge capacity of the battery under the condition of-40 DEG C is larger than or equal to 60% compared with the capacity retention rate at normal temperature, the interface impedance amplification is smaller than or equal to 15%, the hydrogen evolution amount is reduced by 80% on year-on-year basis, the process is compatible with an existing production line, and the battery is suitable for polar scientific investigation and electronic equipment in plateau and cold regions.

The invention discloses a metal zinc negative electrode with a PDMS (at) MOF composite coating and a preparation method of the metal zinc negative electrode, and belongs to the technical field of aqueous zinc ion batteries. According to the technical scheme, the negative electrode comprises a metal zinc negative electrode and a PDMS (at) MOF composite coating arranged on the surface of the metal zinc negative electrode; the PDMS (at) MOF composite coating is of a composite structure formed by infiltrating and coating PDMS on the surface and pores of a metal organic framework (MOF). The negative electrode has the beneficial effects that the PDMS (at) MOF composite structure coating is constructed to synergistically inhibit zinc dendritic crystal growth and side reaction, so that the cycle life and the stability of the battery are remarkably improved.

This invention relates to an electrolyte for improving the float charging performance of zinc-nickel batteries, its preparation method, and its application. The electrolyte comprises the following raw materials by weight percentage: 25-50% alkali agent, 5-15% ZnO, 0.5-5% lithium salt, 0.1-5% boric acid and / or borate, 0.005-0.03% silicate, 0.01-0.5% surfactant, and 0.01-0.5% additives, with the balance being pure water. The additives are ammonium o-sulfobenzoate, 3-amino-1,2,4-triazole, and N-benzyloxycarbonyl-L-threonine. The additives of this invention, through the synergistic effect of the three components, effectively inhibit dendrite growth and hydrogen evolution corrosion of the zinc anode, significantly improving the cycle stability, safety, and service life of zinc-nickel batteries under float charging conditions.

The invention discloses a preparation method of a metal negative electrode material of a sodium secondary battery and the sodium secondary battery. The preparation method comprises the following steps: S1, carrying out heteroatom surface modification treatment on a pure-phase continuous carbon nanotube film; s2, preparing a sodium-containing molten liquid; s3, dipping the carbon nanotube film subjected to surface modification treatment in the step S1 into a sodium-containing melt liquid; and S4, rolling the carbon nanotube film impregnated in the step S3, coating and rolling to obtain the ultra-thin sodium metal negative electrode coiled material, so that the energy density and the safety of the battery can be remarkably improved, and the cycle life of the battery can be remarkably prolonged.

This paper presents a one-pot method for preparing imine-based covalent organic framework materials (iCOFs) and their applications, belonging to the field of porous material synthesis and functionalization technology. The method involves mixing an amino monomer with an aldehyde monomer containing sodium bisulfite and aniline as a modifier, and then conducting a one-pot reaction under acidic catalysis. Utilizing the in-situ nucleophilic addition of sodium bisulfite to the imine bond, a uniform introduction of sulfonate anions into the covalent organic framework is achieved in one step, preserving crystallinity and pore structure while reducing costs. The resulting iCOFs are then composited with carboxylated cellulose nanofibers to prepare a solid-state sodium-ion battery separator. The dense anion distribution within the framework effectively restricts anion movement and inhibits sodium dendrite growth, endowing the battery with high discharge specific capacity, low interfacial impedance, and long-term cycle stability exceeding 1500 hours, demonstrating broad application prospects in the field of solid-state batteries.