9results 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 relates to the technical field of lithium batteries, and discloses a multifunctional electrolyte and a lithium metal battery, the electrolyte comprises an organic solvent, an active additive and a lithium salt, and the active additive comprises a leveling additive, a film-forming additive and a brightening additive. According to the active additive composed of the three components, the three additives interact, the leveling additive can generate characteristic adsorption on the surface of a metal electrode, then the film forming additive and the brightening additive are induced to generate self-assembly on the surface of the metal electrode through chemical adsorption, and a stable surface molecular layer is formed. The materials used in the invention are all commercially purchased, the operation is simple and convenient, the production cost is low, and large-scale industrial production is facilitated.

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 relates to the technical field of flow batteries, in particular to an electrolyte for a positive electrode and a negative electrode of a zinc-bromine flow battery and a preparation method of the electrolyte, and the electrolyte comprises zinc oxide, hydrobromic acid, a compound raw material, an additive and deionized water, the compound raw material is formed by mixing crown ether and quaternary ammonium salt. According to the invention, a compound raw material prepared by adding crown ether and quaternary ammonium salt and zinc bromide molecules as an object form a complex through hydrogen bonds, volatilization and self-discharge phenomena of bromine in the electrolyte are weakened after combination, and the charge-discharge characteristics of the battery are optimized; by adding the additive, the additive can cover hydrogen evolution active sites on the zinc surface in the use process of the battery, inhibit the hydrogen evolution reaction in the zinc deposition process and promote the desolvation process of hydrated zinc ions, so that the effects of grain refinement and dendritic crystal inhibition are achieved, and the performance and safety of the battery are guaranteed; the cycle life and the stability of the battery are improved.

The present invention belongs to the technical field of zinc negative electrode materials, and particularly relates to a zinc metal negative electrode material having Zn (002) and Zn (103) crystal surface textures, and a preparation method and application thereof. In a texturing agent, a zinc foil is used as a working electrode, and a non-epitaxial deposition method is adopted to form a deposition layer on the surface of the zinc foil to obtain a zinc metal negative electrode material having Zn (002) and Zn (103) crystal surface textures. The present invention adopts a ZnSO 4 A mixed aqueous solution of zinc and phytic acid is used as a texturing agent, and the surface of the metal zinc is textured by a non-epitaxial electrodeposition method to obtain zinc metal with (002) and (103) crystal plane textures, and the zinc metal is used as a negative electrode material. The preparation method of the present invention is simple in process, low in cost, and can be mass-produced. The zinc metal negative electrode material prepared by the present invention is used in aqueous zinc ion batteries, which can effectively inhibit the growth of zinc dendrites and side reactions on the negative electrode surface, thereby showing excellent cycle stability.

The present invention relates to a lithium secondary battery comprising: an electrode assembly comprising an electrode and a porous coating layer formed on the electrode; and a flame-retardant electrolyte containing a flame-retardant solvent defined as a predetermined flash point and a lithium salt, in which the porous coating layer contains polymer particles or ceramic particles having a zeta potential absolute value of 25 mV or more, thereby improving stability while maintaining various properties of the lithium secondary battery.

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.