19results about How to "Improved interface contact" patented technology

The utility model relates to the technical field of battery manufacturing, and discloses an electrode assembly which comprises a first pole piece, a second pole piece, a first diaphragm, a second diaphragm and a supporting assembly, when the electrode assembly works, the battery cell body expands, and the first supporting layer attached to the inner wall surface of the accommodating space supports the battery cell body, so that expansion and displacement of the battery cell body towards the accommodating space are inhibited, interface contact is improved, and lithium precipitation is improved; the second supporting layer is arranged in the first supporting layer, and the elastic modulus of the second supporting layer is smaller than that of the first supporting layer, so that the first supporting layer can contract towards the interior of the first supporting layer under a relatively high pressure to adapt to relatively high expansion of the battery cell body, and interface contact is guaranteed; therefore, the normal use of the electrode assembly at the end of the battery cell circulation is ensured.

The application discloses a kind of solid electrolyte material and its preparation method, positive pole piece, solid electrolyte film and full solid battery, it is related to solid battery field;Method comprises: lithium lanthanum zirconium oxygen base solid electrolyte is dispersed in first solvent, and electrolyte dispersion liquid is made;Acidic pH regulator is added to the electrolyte dispersion liquid, and the pH of the electrolyte dispersion liquid is adjusted to 7~8, and neutral dispersion liquid is obtained;Orthosilicate is added to the neutral dispersion liquid and mixed to obtain dispersion solution;During mixing process, polysiloxane is formed by the reaction of orthosilicate, and polysiloxane is coated on the surface of lithium lanthanum zirconium oxygen base solid electrolyte;The dispersion solution is subjected to electrolyte separation and drying treatment to obtain a solid electrolyte material.The application aims to improve the surface properties of lithium lanthanum zirconium oxygen base solid electrolyte, so that it can build good interface contact with other inorganic materials.

The present application relates to a kind of based on carbonized wood natural structure dopamine electrochemical sensor and its preparation method and application, the working electrode of the electrochemical sensor is modified with carbonized wood-ZnO nanowire-ZIF-8.The electrochemical sensor of the present application uses carbonized wood as substrate, after cutting carbonized wood whole piece, using conductive carbon paste is pasted on working electrode, while ensuring conductivity, also retain the three-dimensional structure of nanomaterial not be destroyed, guarantee the performance of sensor, with good application prospect.

This invention provides a bipolar electrode and a bipolar all-solid-state battery. The bipolar electrode comprises a positive electrode film, a current collector, a bulk material layer, and a carbon material layer. Through the design of the carbonaceous framework and nucleating agent in the bulk material layer, efficient and dense lithium metal deposition is achieved under high voltage conditions. The carbon material layer significantly improves the interfacial contact between the bulk material layer and the all-solid-state electrolyte, reduces interfacial resistance, and improves the deposition and extraction efficiency of lithium metal in the bulk material layer. Furthermore, the carbon material layer provides storage space for lithium metal deposited from the positive electrode, mitigating volume changes during lithium metal deposition in the bulk material layer and improving the stability of the bipolar electrode. The bipolar all-solid-state battery fabricated using the bipolar electrode exhibits high rate capability and long lifespan.

The utility model discloses a mixing device for preparing concentrated fruit and vegetable juice, and relates to the technical field of fruit and vegetable juice preparation, the mixing device comprises a mixing cylinder, a bubble generator is arranged in the middle of the bottom end of the mixing cylinder and is used for generating tiny bubbles; the stirring part is arranged at the top of the mixing barrel and is used for stirring and mixing the concentrated fruit and vegetable juice in the mixing barrel; the input end of the flow dividing part is connected with different kinds of external fruit and vegetable juice, and the flow dividing part is connected with different positions of the lower end of the mixing barrel through a plurality of branch pipes on the flow dividing part and is used for dispersing and injecting the concentrated fruit and vegetable juice into different positions in the mixing barrel, so that different kinds of fruit and vegetable juice can be quickly mixed. According to the mixing device for preparing the concentrated fruit and vegetable juice, different types of fruit and vegetable juice are dispersed and injected into different positions of the mixing barrel through the flow dividing piece through the multiple receiving pipes, liquid flowing and interface contact are accelerated in combination with tiny bubbles generated by the bubble generator, and the mixing efficiency and uniformity are remarkably improved.

The invention provides an electrochemical device and electronic equipment, the electrochemical device comprises a positive electrode, a negative electrode and a diaphragm, the diaphragm comprises a base film and a coating layer, the coating layer comprises a first coating layer and / or a second coating layer, the coating surface density of the first coating layer is a g / m < 2 > / mu m, the coating surface density of the second coating layer is b g / m < 2 > / mu m, an electrolyte contains a fluorosulfonamide compound, and the electrolyte contains an electrolyte. The mass content of the fluorosulfonamide compound in the electrolyte is c%, and the binding power efficiency of the electrolyte is M; the following relational expression is satisfied: M = 25% * a + 75% * b; c / M is greater than or equal to 2.67 and less than or equal to 49.52; through the synergistic effect of the coating layers on the two sides of the diaphragm, the cycling stability, the rate capability and the safety of the battery are improved, meanwhile, the lithium dendrite penetration risk is effectively inhibited, and good dimensional stability is kept under the high-temperature condition; by synergistically limiting the coating surface density of the first coating layer and the second coating layer and the mass content of the fluorosulfonamide compound, the cycling stability, the interface compatibility and the high-temperature storage performance of the lithium ion battery can be remarkably improved.

The present application relates to the technical field of electrode material, in particular to Co3S4 / MnCo-LDH / MnCo2S4 nanocomposite material and its preparation method and application. The present application takes soluble manganese salt and soluble cobalt salt as raw materials, takes foam nickel as carrier, carries out hydrothermal reaction under alkaline environment to obtain MnCo-LDH / NF, then immerses MnCo-LDH / NF in a precursor solution composed of soluble cobalt salt and 2-methyl imidazole, and carries out coordination reaction to obtain MnCo-LDH@ZIF-67 / NF, finally adopts thioacetamide to incompletely sulfide MnCo-LDH@ZIF-67 / NF to obtain Co3S4 / MnCo-LDH / MnCo2S4 nanocomposite material. Through Co3S4 and MnCo-LDH, the technical defects existing in MnCo2S4 are overcome.

This invention discloses a method for preparing an amphiphilic photocatalyst using carbon nitride-supported metal oxides and its application in the aqueous-phase benzene hydroxylation reaction. This catalyst not only retains the unique amphiphilicity of carbon nitride, improving the interfacial contact and mass transfer process between the water / benzene phases and promoting the rapid and efficient transfer of •OH generated in the aqueous phase to benzene to participate in the reaction, but also forms a good interfacial contact between the metal oxide and carbon nitride phases during molten salt heat treatment. Under illumination, photogenerated electrons can efficiently migrate from carbon nitride to the surface of the metal oxide, driving the rapid photo-Fenton reaction. Therefore, this catalyst exhibits excellent catalytic performance in the photocatalytic aqueous-phase benzene hydroxylation reaction to prepare phenol. This invention does not require the addition of additional organic solvents and can achieve a highly efficient benzene hydroxylation reaction in a pure aqueous phase, conforming to the concept of green chemistry and showing good prospects for industrial application.

The application discloses a kind of hole transport layer for improving hole extraction efficiency by π conjugated extension and inhibiting excessive aggregation and preparation method and perovskite solar cell, it is related to photoelectric functional material and perovskite solar cell technical field.The hole transport layer includes hole extraction material, the molecular structure of hole extraction material is mainly with π conjugated hole transport skeleton, and introduce the π conjugated extension fragment capable of expanding π electron delocalization range and the structural unit capable of reducing excessive molecular aggregation on the main body.The hole transport layer prepared by the application can improve the bottom interface contact, reduce the interface non-radiative recombination, improve the hole extraction efficiency, and further improve the open-circuit voltage, fill factor, photoelectric conversion efficiency and working stability of perovskite solar cell, and has good preparation repeatability.

The present application relates to the technical field of chip manufacturing, in particular to a high-speed photoelectric detector and a manufacturing method thereof, the antireflection film prepared based on the spraying process of the polymer has good antireflection effect on the communication waveband light signal, the external quantum efficiency of the photoelectric detector is increased, and the antireflection effect on the light signal is improved; meanwhile, the antireflection film prepared based on the spraying process of the polymer has good interface contact, the polymer releases thermal stress due to the periodic distribution of nano-pores when the temperature changes, the temperature influence on the photoelectric detector is reduced, and no defects are generated on the surface of the photoelectric detector, the influence of the degradation of the photoelectric detector is avoided, and the high-speed response characteristics of the photoelectric detector are ensured.

This invention discloses an inverted perovskite solar cell based on a halogen-substituted aromatic amine organic ammonium salt additive, a perovskite light-absorbing layer, and the field of perovskite solar cell technology. This invention introduces an organic ammonium salt additive containing halogen substituents and ammonium salt groups into the perovskite precursor solution. Utilizing the multi-site interactions formed between the additive's functional groups and the perovskite precursor components, it achieves synergistic regulation of interfacial defect states and residual stress in the thin film, thereby obtaining a perovskite thin film with high crystallinity, low defect density, and high stability. The inverted perovskite solar cell device prepared using this method exhibits superior interfacial charge transport capability and lower non-radiative recombination loss, significantly improving device performance. Furthermore, the device prepared by this invention demonstrates excellent operational stability under long-term illumination and thermal aging conditions, showing promising application prospects.

The invention belongs to the technical field of large-area photovoltaic cells, and particularly relates to a method for realizing mechanical planarization of the surface of a perovskite thin film through blade coating and a preparation method of a perovskite solar cell. The method comprises the following steps: firstly, preparing an initial perovskite layer by adopting a blade coating, gas quenching and annealing process, and then dropwise adding an alcohol auxiliary solution to carry out blade coating, gas quenching and annealing treatment again to flatten the surface of the initial perovskite layer so as to obtain a final perovskite thin film layer; the uniformity and smoothness of the upper surface of the thin film are effectively improved through the dropwise adding of the auxiliary solution and the synergistic effect of the two times of blade coating, gas quenching and annealing processes. When the perovskite solar cell is applied to the perovskite solar cell, the carrier transmission efficiency between a perovskite light absorption layer and an electron transmission layer is effectively improved; the moisture absorbed by the thin film in the blade coating process is reduced, and the damage of the moisture to the perovskite thin film in the subsequent annealing process is reduced, so that the overall performance of the perovskite solar cell is effectively improved.

The application discloses a silicon-carbon composite negative electrode material and a preparation method thereof, a secondary battery and an electric device. The silicon-carbon composite negative electrode material comprises a porous silicon-carbon material, an organic polymer filled in internal pores of the porous silicon-carbon material and coated on part of the surface of the porous silicon-carbon material, and a lithium salt contained in the coated organic polymer coating layer. The polymer in the organic polymer coating layer comprises at least one of polyacrylic acid, polyacrylonitrile and polybenzimidazole. The organic polymer is added to the inside and the surface of the porous silicon-carbon material, and the internal and external organic polymers are in communication with the lithium salt, thereby constructing a continuous lithium ion liquid phase transmission channel without impedance, improving the transmission efficiency of lithium ions. The application utilizes the synergistic effect of the organic polymer and the lithium salt, alleviates the volume expansion of the porous silicon-carbon material, improves the interface contact and stabilizes the SEI film, and can obtain a battery with high capacity, long service life and excellent kinetic performance.

The application belongs to the technical field of solid-state lithium metal batteries, and particularly relates to a carboxymethyl lignin polymer solid-state electrolyte and a preparation method thereof. Lignin is used as raw material, isopropanol is added, sodium hydroxide is used as a catalyst, chloroacetic acid is added, and soluble carboxymethyl lignin is prepared through a carboxymethylation reaction; then the carboxymethyl lignin, polyvinylidene fluoride and lithium bis-trifluoromethanesulfonimide are dissolved in N,N-dimethylacetamide, heated and stirred to form a uniform precursor solution; finally, the precursor solution is spread on a glass culture dish, and a solid-state polymer electrolyte with a smooth surface is obtained through drying. The carboxymethyl lignin prepared by the application is uniformly dispersed in the polymer matrix, can interact with lithium salt to form a uniform lithium ion transmission path. The solid-state electrolyte has excellent mechanical strength, good flame retardant performance, high room temperature ionic conductivity and high lithium ion transference number.

This invention discloses a highly stable electrochromic thin film, its preparation method, and its applications. The electrochromic thin film comprises a conductive material and an electrochromic layer. The electrochromic layer is a quasi-planar heterojunction metal oxide with a thickness of 10–1000 nm. The preparation method includes the following steps: fixing the conductive material on a sample holder and placing it in an electron beam cavity; pretreating the conductive material; and then using high-energy ion-assisted electron beam evaporation to deposit the metal oxide onto the conductive material, thereby obtaining the electrochromic thin film. This invention, employing the aforementioned highly stable electrochromic thin film, its preparation method, and its applications, overcomes the trade-off between high stability and ultrafast switching performance with the assistance of high-energy ions, exhibiting significant overall electrochromic performance, including high optical contrast, ultrafast switching speed, and excellent stability.

The invention provides a preparation method of an aramid fiber-based ultrathin electrothermal film and the obtained electrothermal film. The preparation method comprises the following steps: S1, adding aramid fibers into a mixed solution of potassium hydroxide and dimethyl sulfoxide, adding isopropanol, unbundling to obtain aramid nanofibers, and carrying out reinforced dispersion to obtain an aramid nanofiber suspension; s2, adding pyrrole into the aramid nanofiber suspension, magnetically stirring, adding a ferric trichloride aqueous solution, and performing in-situ polymerization to obtain an aramid nanofiber coated polypyrrole suspension; and S3, adding the aramid nanofiber suspension into the aramid nanofiber coated polypyrrole suspension, forming a film, soaking the film in a polyvinylidene fluoride organic solvent solution, and polymerizing to obtain the electrothermal film. The contact resistance is low, the number of conductive paths is large, and the conductivity is good, durable and stable; the heating uniformity is good, the thermal response speed is high, and the electro-thermal conversion efficiency is high; the material consumption is small, the weight is light, the thickness is small, the cost is low, the flexibility is good, and the method is easy to process and widely applied to large-scale commercialization.

The invention relates to the technical field of battery pole piece preparation, in particular to an all-solid-state battery pole piece preparation device. Comprising an unwinding mechanism, a dressing mechanism, a baking and sintering treatment mechanism and a winding mechanism; the dressing mechanism is arranged on the downstream portion of the unwinding mechanism, and the baking and sintering treatment mechanism is arranged on the downstream portion of the dressing mechanism and comprises a box body, a hot air assembly, a laser baking assembly and a laser sintering assembly, the box body is provided with an inlet and an outlet through which a pole piece passes; the hot air assembly is used for providing hot air into the box body; the laser baking assembly is used for baking the pole piece; the laser sintering assembly is used for sintering the solid electrolyte in the baked pole piece; and the winding mechanism is arranged at the downstream of the baking and sintering treatment mechanism. According to the invention, pole piece baking and solid electrolyte in-situ sintering densification can be synchronously realized on a continuous production line, solid-solid interface contact is improved, and interface impedance is reduced.

The invention discloses a fluorine filler modified polymer electrolyte and a preparation method thereof, and belongs to the field of new energy battery electrolytes.According to the polymer electrolyte, on one hand, dissociation of lithium salt is promoted through the Lewis acidity of fluorine filler, and high room-temperature ionic conductivity is achieved; and on the other hand, a stable interface layer is constructed through metal elements and fluorine elements in the filler, stable long circulation of the symmetric battery is realized, and stable operation of the conversion type positive electrode material ferric fluoride at room temperature is realized. According to the polymer electrolyte prepared by the scheme, the defects of a conversion type positive electrode material can be overcome, so that system construction of a lithium ion battery with higher energy density is realized, and the polymer electrolyte is expected to become an ideal choice for high value-added scenes such as flexible electronics and wearable equipment.

The invention provides a resin material, a carbon material and a preparation method and application thereof, and relates to the technical field of battery negative electrode materials, the resin material comprises polyhedral resin particles, the polyhedral resin particles comprise a first resin plane, and the first resin plane is a polygonal resin plane. Compared with a spherical material, the filling and bonding properties are greatly improved. The polyhedral carbon material is obtained from the polyhedral resin material, and the polyhedral silicon-carbon composite material is obtained on the basis of the polyhedral carbon material. The spherical silicon-carbon negative electrode material shows relatively good cycling stability in lithium battery negative electrode application. The polyhedral material overcomes the defects of a block material and a spherical material, integrates the advantages of the block material and the spherical material, and provides an ideal silicon-carbon composite material. The polyhedral silicon-carbon composite material solves the technical bottlenecks of high interface impedance and weak binding power caused by limited contact area of a spherical silicon-carbon negative electrode material in the prior art, and unstable electrode structure caused by high brittleness and difficulty in uniform dispersion of a block material.