33 results about "Electron delocalization" patented technology

The invention discloses a fullerene dumbbell photocatalyst for improving photocatalytic hydrogen production performance through electron delocalization. The fullerene dumbbell photocatalyst has an acceptor-donor-acceptor characteristic, is of a fullerene-thiophene fused ring dumbbell-shaped structure, comprises two symmetrically modified fullerene carbon cages, is bridged by a fused ring electron donor in the middle, and is similar to a dumbbell in shape. The fullerene dumbbell compound has the structural characteristic as shown in the formula I. The catalyst is simple in preparation process and high in design regularity. Importantly, the dumbbell molecular photocatalyst has a remarkable electron delocalization property, so that the photocatalytic hydrogen production performance is greatly improved. According to the invention, beneficial guidance is provided for design of an efficient photocatalyst and photocatalytic hydrogen production.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a method based on one-step in-situ synthesis of a copper cyanophenylacetylene / copper phenylacetylene (CN-PhCCu / PhCCu) homogeneous heterojunction composite photocatalyst and application. The homogeneous heterojunction composite photocatalyst with a compact interface structure is synthesized in situ in one step under a mild condition by regulating and controlling the ratio of copper cyanophenylacetylene (CN-PhCCu) to copper phenylacetylene (PhCCu). The heterojunction can effectively promote exciton dissociation and photo-induced electron delocalization, remarkably inhibit charge recombination and improve the utilization efficiency of visible light. Experiments show that the composite photocatalyst shows excellent degradation performance on various water pollutants such as diclofenac (DCF) under irradiation of visible light, and has the advantages of high degradation efficiency, wide pH application range, strong coexisting ion interference resistance and the like. The method disclosed by the invention is simple in process and mild in condition, and provides a new material and technical support for efficient visible light driven water body pollution control.

The application belongs to the technical field of solar cells, and relates to synthesis of an organic phosphonic acid small-molecule material for hole transport and application of the small-molecule material in a perovskite solar cell. The small-molecule material takes imidobenzyl as a central core, takes a n-butyl alkyl chain as a connecting part, and takes a phosphonic acid group as an end group. Through more sufficient electron delocalization space, not only the coordination with the perovskite is strengthened, the hole transport capacity is improved, but also the perovskite surface defects are effectively passivated, and the charge transport capacity with the ITO substrate is enhanced. The phosphonic acid small-molecule material has a simple and reliable preparation method, can be used to prepare a high-efficiency perovskite solar cell at low cost, and has wide application prospect and market potential.

The present application relates to the technical field of catalyst, especially to a surface-reconstructed heterojunction catalyst and its preparation method and application. The present application combines high-temperature atomization deposition and phosphating treatment to build Ga-doped Ni2P / Fe2P heterostructure on a nickel mesh substrate, and in-situ reconstructs to form a NiOOH / FeOOH-Ga2O3 heterojunction catalyst during the OER process. Ga2O3 induces interface electron delocalization through p-d orbital hybridization, optimizes the reaction kinetics, and simultaneously acts as a physical barrier layer to inhibit Cl ‑ corrosion, thereby endowing the catalyst with high activity, high selectivity and high stability.

The invention belongs to the technical field of materials and advanced oxidation, and particularly relates to a phenanthroline-containing pyrenyl 2D covalent organic framework material as well as a preparation method and application thereof, and the covalent organic framework material is synthesized by taking 1, 3, 6, 8-tetra-(p-aminophenyl)-pyrene and 4, 4 '-(1, 10-phenanthroline-3, 8-diyl) dibenzaldehyde as precursors through Schiff base condensation reaction. According to the COFs material synthesized by the invention, on the basis of containing phenanthroline, by increasing benzene rings, regulation and control on covalent organic framework electron delocalization on the molecular level are realized, so that the capability of activating PMS to degrade organic pollutants is enhanced, and the COFs material is suitable for not only the organic pollutant bisphenol A, but also the organic pollutant PMS. The COFs prepared by the method also has an excellent degradation effect on other organic pollutants such as sulfadiazine and atrazine, and in addition, the COFs also has good cycle stability and does not generate secondary pollution.

The invention discloses a polyimide Schiff base polymer containing a thiophene structure and application of the polyimide Schiff base polymer in a lithium ion battery, and belongs to the technical field of organic electrode materials of the lithium ion battery. The structural general formula of the polyimide Schiff base polymer containing the thiophene structure is shown in the specification. By introducing a thiophene ring, a main chain pi conjugated structure is remarkably expanded, the electron delocalization degree is enhanced, and the intrinsic electron conductivity and the interface charge transmission capacity of the material are improved by utilizing the high polarizability of sulfur atoms and the characteristic that p orbits participate in conjugation; meanwhile, imide carbonyl and a Schiff base C = N bond in the material are main lithium storage active sites, and a thiophene conjugated unit is beneficial to electron transmission and structural stability, so that the material is endowed with relatively high specific capacity, excellent rate capability and cycling stability. The material has the advantages of simple synthesis method, easily available raw materials and stable structure, and is suitable for being used as a high-performance lithium ion battery organic negative electrode material.

The invention provides a tin and indium extraction agent and a method for extracting and separating tin and indium from a tin and indium-containing solution, and relates to the technical field of extraction and separation. The invention provides a tin and indium extracting agent. The tin and indium extracting agent comprises D2EHPA, n-alkane and sulfonated kerosene, the number of carbon atoms of n-alkane is greater than or equal to 7. According to the tin-indium extracting agent provided by the invention, the vibration degree of freedom of a P-OH group in D2EHPA is limited through a steric hindrance effect on the basis of a rigid microenvironment provided by long straight-chain n-alkane, an intermolecular hydrogen bond network is formed, so that D2EHPA shows high-selectivity binding capacity to indium ions, and the extraction activity of D2EHPA to the indium ions is improved; through hydrophobic interaction of n-alkanes, the electron delocalization effect of P = O in D2EHPA molecules is weakened, the extraction activity of D2EHPA on tin ions is reduced, the co-extraction phenomenon of tin and indium in the prior art is avoided, and high-selectivity extraction separation and recovery of indium ions and tin ions in a tin-indium complex system are achieved.

The application discloses a kind of containing bio-based furan ring polysiloxane fluorescent material and preparation method thereof, belong to polymer luminescent material field.In the application, different silane coupling agent, bio-based 2,5-furan dimethyl alcohol and different carbon chain length aliphatic dihydric alcohol are prepared to polysiloxane fluorescent material by ester exchange polycondensation reaction.In the application, by adjusting the molar ratio of rigid 2,5-furan dimethyl alcohol and aliphatic dihydric alcohol monomer, and the kind of silane coupling agent and aliphatic dihydric alcohol monomer, different structure containing bio-based furan ring polysiloxane fluorescent material is prepared;Bio-based 2,5-furan dimethyl alcohol introduced in the application, not only can adjust the rigidity and flexibility of polysiloxane structure, but also can promote the formation of space n-n and n-pi interaction, expand the range of electron delocalization, make its emission wavelength red shift to green fluorescent range (500nm-570nm);Simple synthesis process is conducive to large-scale production.

The invention discloses a preparation method of an NDI-NiFe-MOF nano array material, which comprises the following steps: adding ethanol, water and N, N-dimethyl diamide into nickel nitrate, ferric chloride and N, N-bis (3-carboxyl-4-hydroxyphenyl)-1, 4, 5, 8-naphthalene tetradicarboximide; performing ultrasonic oscillation, and adding foamed nickel for reaction; and filtering, washing and drying. A unique nanoflower structure is formed by the material, so that the contact area with an electrolyte is increased, an ultra-large aperture, more metal active sites and a high specific surface area are provided, and the capacity of the electrode material can be enhanced; and in a long-cycle test, excellent stability is still kept, which is benefited from the unique rigid macrocyclic core structure of H4NDISA. The NDI unit has excellent electron affinity and oxidation-reduction performance, stable free radicals are generated in the reversible oxidation-reduction process, electron delocalization and efficient transmission are achieved through pi-pi accumulation, and high electrochemical performance is achieved.

This invention provides a metal covalent organic framework material and its preparation method, as well as a positive electrode sheet for a lithium-air battery, belonging to the field of lithium-air battery technology. The metal covalent organic framework material represented by Formula I is a one-dimensional metal covalent organic framework material, avoiding the problem of insufficient utilization of active sites within a two-dimensional layered structure, thus improving the discharge specific capacity and cycle stability of the lithium-air battery. In Formula I, the electronegativity of the two nitrogen atoms in the two pyridine rings induces local positive charges at the M center, forming strong Lewis acid sites. Simultaneously, ligand-metal charge transfer enhances the conductivity and electron delocalization of the active sites in the metal covalent organic framework material, improving the discharge specific capacity of the lithium-air battery. Furthermore, the M atoms are anchored to the metal covalent organic framework material framework through coordination bonds, maintaining the active site density and structural integrity of the metal covalent organic framework material, thereby improving the cycle stability of the lithium-air battery.

The invention relates to the technical field of environmental protection, and provides a method for modifying a covalent triazine framework by using small molecules and application of the covalent triazine framework. The preparation method comprises the following steps: carrying out cyclotrimerization reaction on terephthalonitrile under an acid catalysis condition to prepare a covalent triazine framework CTF-1, and covalently grafting micromolecule 2-cyanopyridine or 2-cyanothiophene to the tail end nitrile group of the CTF-1 under the acid catalysis condition by taking the residual nitrile group at the tail end of the CTF-1 as a site to carry out end capping, thereby obtaining the micromolecule modified covalent triazine framework CTF-Cy or CTF-Th. The covalent triazine framework modified by micromolecules enhances pi-conjugation and electron delocalization in a molecular plane and forms a built-in polarization field while maintaining high crystallinity and pore integrity of the framework, so that the separation and transmission efficiency of photon-generated carriers is remarkably improved, efficient and stable photocatalytic reduction of U (VI) is realized, and the covalent triazine framework modified by micromolecules has a good application prospect.

The invention belongs to the technical field of perovskite solar cells, and particularly relates to a perovskite solar cell and a preparation method. The perovskite solar cell comprises a hole transport layer, the hole transport layer is doped with N1, N1, N4, N4-tetra (4-bromophenyl) benzene-1, 4-diamine containing a plurality of aromatic rings to serve as a bridging agent, due to the small molecule flexibility, the hole transport layer can be inserted between 2, 2 ', 7, 7'-tetra [N, N-di (4-methoxyphenyl) amino]-9, 9 '-spirobifluorene molecules, the hole transport path is shortened, and the hole transport efficiency is improved. The transition potential barrier is reduced; and the electron delocalization degree of the bridging agent is relatively high, so that hole transport can be promoted by doping, a carrier transport path is optimized, the conductivity of the material is improved, and the photoelectric conversion efficiency of the device is improved. Components in the hole transport layer are tightly and orderly arranged, so that bidirectional improvement of efficiency and stability is realized.

The invention discloses a secondary battery and a power utilization device, and belongs to the technical field of batteries, according to a compound with a structure shown in a formula I, one lithium ion in lithium squarate is replaced with a neutral molecule (namely R1), the electronegativity of squaric acid radicals can be effectively reduced, meanwhile, steric hindrance between the lithium ion and the squaric acid radicals is increased, and the stability of the lithium ion and the squaric acid radicals is improved. The binding capacity of squaric acid radicals to lithium ions is effectively reduced, the oxidation stability of a squaric acid radical framework is enhanced, the gas production problem is relieved, the lithium supplementing effect is effectively improved, lithium ions lost due to irreversible reaction are supplemented, and pi electrons in molecules are not limited to a certain atom due to electron delocalization caused by an annular structure of the squaric acid radicals. Compared with the prior art, the negative ions are free to move in the whole conjugated system, so that the local charge density of the negative ions is reduced, the thermodynamic stability is enhanced, the growth of lithium dendrites is effectively inhibited, the continuous decomposition of the electrolyte is prevented, the cycle performance and storage performance of the secondary battery are effectively improved, and the impedance is reduced.

The invention belongs to the technical field of photocatalysis, and relates to a composite photocatalyst AE / g-C3N4 as well as a preparation method and application thereof, and the composite photocatalyst AE / g-C3N4 comprises graphite phase carbon nitride g-C3N4 and aloe-emodin AE attached to the surface of g-C3N4. The aloe-emodin is introduced into the graphite phase carbon nitride for the first time, separation and migration of photon-generated carrier charges of the graphite phase carbon nitride are promoted by utilizing a pi-electron delocalization effect of the aloe-emodin, and the separation efficiency of high carriers in the graphite phase carbon nitride is improved, so that the efficiency of photocatalytic production of H2O2 is improved.

The invention relates to the technical field of electrochemical advanced oxidation and sewage treatment, in particular to preparation of a self-supporting monatomic cobalt electrode and a method for degrading organic pollutants by activating persulfate in an electrically enhanced manner. According to the prepared self-supporting monatomic cobalt electrode, use of an adhesive is avoided, exposure and mass transfer of active sites are improved, the real inherent activity of the self-supporting monatomic cobalt electrode is exerted, and efficient activation of persulfate is achieved. According to the method, a self-made self-supporting monatomic cobalt electrode is used as an anode, a Pt sheet is used as a cathode, and an electrically-enhanced activated persulfate system is constructed. The electrochemical system can efficiently degrade pollutants under the low oxidant concentration of 0.2 mM, due to the fact that under the action of an anode electric field, the local PMS concentration of active sites is increased, the electron delocalization effect generated by cobalt sites promotes electron transfer with PMS, physical and energy barriers needed by PMS activation are jointly reduced, generation of active species is further improved, and the PMS activation efficiency is improved. And pollutants are efficiently degraded.

In some embodiments, an apparatus comprises a first electrode and a second electrode defining a gap therebetween; a molecular wire disposed across the gap, and configured to electrically connect the first electrode and the second electrode, the molecular wire including: at least one molecule of deoxyribonucleic acid (DNA) including a double stranded portion; and a plurality of functional groups coupled to nucleotides of the at least one molecule of DNA at predetermined positions along the at least one molecule of DNA, the plurality of functional groups configured to cause electron delocalization along the molecular wire to increase an electrical conductivity of the molecular wire; and a first molecular linker configured to couple a first portion of the molecular wire to the first electrode and a second molecular linker configured to couple a second portion of the molecular wire to the second electrode.

The invention provides an organic electroluminescent compound and an organic electroluminescent device. The organic electroluminescent compound is shown as a formula 1. In the formula 1, R1 and R2 are selected from hydrogen, deuterium, fluorine, substituted or unsubstituted C1-C5 alkyl, substituted or unsubstituted C3-C6 cycloalkyl, substituted or unsubstituted C6-C20 aryl, and substituted or unsubstituted C5-C20 heteroaryl; a and b are selected from integers of 0-7; ar1, Ar2, Ar3 and Ar4 are selected from hydrogen, deuterium, substituted or unsubstituted C1-C5 alkyl groups, substituted or unsubstituted C3-C6 cycloalkyl groups and substituted or unsubstituted C6-C20 aryl groups; c, d and e are respectively and independently selected from integers of 0-4; f is an integer selected from 0-5. According to the compound disclosed by the invention, an aromatic ring is fused on a spirobifluorenyl group and is matched with a bifluorenyl structure, so that the HOMO orbital electron delocalization range is effectively expanded, the carrier mobility of the material is greatly improved, the efficiency of a device is further improved, meanwhile, the high carrier mobility is realized, an exciton composite region is widened, and the photoelectric conversion efficiency is improved. And the efficiency of the device is improved.

The invention relates to the technical field of organic photoelectric materials, and particularly discloses an organic small molecular luminescent material and application thereof. According to the present invention, the one-pot aromatic nucleophilic substitution SNAr and C-H coupling reaction is adopted to synthesize the six kinds of the [b] fused BODIPYs containing sulfur, nitrogen and oxygen heteroatoms, such that the research blank of the influence of the heteroatoms on the photoelectric property of the BODIPY is filled, and the new method for identifying the heteroatom group based on the < 19 > F NMR is further developed; monocrystal X-ray diffraction, an electrostatic potential diagram and NIC (0) calculation reveal that heteroatoms form a one-dimensional J-type aggregate accumulation mode through electronegativity and intermolecular interaction, and initiate electron delocalization and electron transfer, so that the defects in the prior art provide important reference for design and application of photoelectric molecular materials.

The invention belongs to the technical field of detection, and particularly relates to a multi-wavelength excitation near-infrared resonance Raman probe molecule and a preparation method thereof, nanoparticles and application, two donor-acceptor-donor type Raman probes BTA1 and BTA2 are designed and synthesized, the probes have planar molecular structures and are highly conjugated in the alkynyl direction, and the probe has a wide application prospect. The donor-acceptor-donor structure effectively promotes intramolecular charge transfer, so that an absorption spectrum is subjected to red shift to a first near-infrared region, and meanwhile, molecular fluorescence is remarkably reduced. In addition, the planar molecular configuration enhances the intermolecular pi-pi accumulation effect, induces a strong aggregation-induced fluorescence quenching effect, and further inhibits fluorescence emission. Benefited by the synergistic effect of pi electron delocalization and aggregation-induced fluorescence quenching of a molecular skeleton, BTA1 and BTA2 have strong Raman signals under excitation of 488 nanometers, 532 nanometers, 633 nanometers and 785 nanometers, and show excellent compatibility with a commercial laser light source.

A neurotransmitter moiety, dopamine, was chemically modified with a nitro-group to explore its influence on synthesizing a multifunctional biomaterial for therapeutic applications. Chemically, by manipulating the aromatic-electron density. while nitro-group prevented the self-oxidation of catecholic domain. this facilitated the aromatic suturing of nitrocatechol moieties, forming a novel macromolecular structure. Incorporation of the sutured-nitrocatecholic moieties in a gelatin-based hydrogel introduced extended pi-electron delocalization mediated electroconductive microenvironment and maintained its adhesive properties originated from the catecholic domains, forming a multi-functional bioadhesive for tissue repairing. Embodiments of the invention include engineered hydrogels enriched with multi-mode noncovalent interactions and excellent mechano-physical properties that are useful for diverse biomedical applications.

The invention belongs to the technical field of molecular materials, and relates to an oxygen-containing ring [10] monomer molecule, a preparation method, a photoresist composition and application. The invention creatively develops an oxygen-containing ring [10] monomer molecule with a novel structure, and the oxygen-containing ring [10] monomer molecule is added into the photoresist formula and is cooperated with the fluorene-containing (methyl) acrylate resin and other components, so that the excellent comprehensive performance is maintained, the dielectric constant is obviously reduced, the high resolution (up to 10 [mu] m) and the appropriate adhesive force are achieved, and the application prospect is wide. And the requirements of advanced electronic materials on low-dielectric and high-resolution patterns are met. By introducing an acrylate group, the solubility of a core skeleton of the cyclic [10] arene is greatly improved, and the conjugation effect and pi electron delocalization capability of molecules are enhanced. And through the Diels-Alder ring expansion reaction with alkynyl-containing monomers, the ring size is effectively increased, the plane rigidity is reduced, and the photoelectric property and the processing adaptability are further optimized.

The invention discloses a multi-electron transfer quinone derivative as well as a preparation method and application thereof. The multi-electron transfer quinone derivative has a structure as shown in a formula I, the multi-electron transfer quinone derivative takes a series of pyrene as a substrate, carbonyl redox centers are introduced to 4, 5, 9 and 10 sites through a low-cost metal catalytic oxidation reaction, then hydrophilic through a sulfonation reaction and used as a reversible couple, and the multi-electron transfer quinone derivative can be directly used as an electrolyte for an aqueous organic flow battery after being dissolved in water without subsequent treatment. The pyrene tetraketone derivative couple can realize two-to-four-step four-electron transfer in the oxidation-reduction process, and compared with a traditional organic active couple with single electron transfer, the volume capacity is improved by four times; meanwhile, due to the expanded conjugated structure of the pyrene tetraketone parent nucleus, the electron delocalization range is enlarged, and the rigidity of an organic framework is enhanced, so that the couple has excellent redox kinetics and cycling stability.

The invention discloses a narrow-band-gap poly-small-molecule acceptor material as shown in a formula I and a preparation method and application thereof. Benzotriazole is used as an electron withdrawing unit of a central core, and the push-pull electron effect in molecules is enhanced; a selenophen unit is embedded into a conjugated skeleton, conjugation is expanded by utilizing the strong electron delocalization capability of the selenophen unit, and an absorption spectrum is widened; a cyano indanone end group is connected with a pi bridge through a gamma site, so that the problem of regional isomerism caused by uncertain connection sites is avoided while the conjugation continuity is guaranteed. The polymer acceptor material obtained based on the above strategy effectively overcomes the limitation of narrow absorption range of the existing polymer acceptor, shows strong near-infrared light absorption characteristics, widens the absorption spectrum to 940nm, and narrows the corresponding optical band gap to 1.32 eV; an all-polymer organic solar cell constructed by using the polymer as a receptor can realize high short-circuit current density of 25.2 mA cm <-2 > and energy conversion efficiency of 15%.

The invention discloses application of cyano-bridged bimetallic nano-enzyme in preparation of a tumor catalytic treatment medicine, and belongs to the technical field of medicines. The invention provides a design strategy of a bimetallic nano-enzyme taking coordination field engineering as a theoretical basis and cyano bridging as a structural carrier, and Cu2 [Fe (CN) 6] is adopted to prepare a tumor catalytic treatment drug. In the nano enzyme, the cyano group is used as a strong field bridging ligand and can form an electron delocalization network, and meanwhile, due to different electronegativity of copper and iron, the d orbital energy levels of copper and iron can generate synergistic distortion, so that electron transfer is synergistically driven, and the electron transfer efficiency is remarkably improved. In addition, by virtue of a cyano bridging effect, the stabilization effect of a strong coordination field can inhibit metal agglomeration, so that Cu is in monatomic distribution, and the catalytic treatment capability of the nano-enzyme is further enhanced. After being modified by an immunogenic tumor exosome, the nano-enzyme not only improves the targeting property to tumors, but also can exert high-efficiency peroxidase-like and glutathione-like oxidase activity in a tumor microenvironment, so that catalysis-immune synergistic treatment is realized.

The application discloses a kind of fluorine boron pyrrole fluorescent compound with fixed donor structure, by using vinyl bridge, donor moiety pyrene and carbazole are connected to the alpha position of BODIPY core, to prepare two molecules with fixed donor-acceptor conformation, improve fluorescence quantum yield, can produce narrow spectrum with very narrow half peak width, high color purity fluorescent emission.Simultaneously, the fluorine boron pyrrole fluorescent compound with fixed donor structure in the present application has super high near-infrared light emission in organic solvent.The fluorine boron pyrrole fluorescent compound with fixed donor structure can efficiently improve π electron delocalization by vinyl bridge, can make carrier injection and transmission more balanced, improve device performance, so it has significant economic value in the application of light-emitting device, light-emitting material and display material, intelligent material and the like.

The invention belongs to the technical field of electrode active materials, and particularly relates to a battery positive electrode material, an aqueous zinc ion battery and a preparation method. Through in-situ uniform doping of the cobalt element, Co < 2 + > enters a MnCO3 crystal structure in a lattice site substitution manner, and the electron delocalization in a lattice can be enhanced by additional two valence electrons, so that an electron transition energy barrier is reduced by about 0.3 eV, and finally, the conductivity is improved by 1-2 orders of magnitude. The improvement of the conductivity directly accelerates the charge transfer rate of the electrode and the electrolyte interface, and effectively inhibits the polarization phenomenon under high current density. Besides, the doping of cobalt can reduce the dissolution trend of Mn < 2 + >, and the performance test shows that the capacity retention ratio of the material is almost 100% after 100 cycles at the medium-high current density of 1A g <-1 > under the preferable condition, and the capacity retention ratio still reaches 95.6% after 200 cycles.

The invention belongs to the technical field of electrochemistry, and particularly relates to a water-based aluminum ion battery based on a phenothiazine micromolecular organic positive electrode and a preparation method of the water-based aluminum ion battery. The aqueous aluminum ion battery is composed of a phenothiazine micromolecular organic positive electrode, a high-concentration mixed electrolyte, an aluminum negative electrode pretreated by nitric acid and a carbon nanotube modified composite diaphragm, and has high capacity, long service life and high safety. The phenothiazine micromolecular organic positive electrode is represented by methylene blue and neutral red, compared with a traditional inorganic positive electrode, the phenothiazine micromolecular organic positive electrode has a pi-pi conjugated structure and a-C = N-reversible redox active center, promotes electron delocalization and ion migration, and is matched with a composite diaphragm to effectively relieve dissolution and loss of a positive electrode active material in the cycle process, so that the cycle performance of the positive electrode is improved. Therefore, the aluminum storage reversibility and the electrode structure stability are improved. The high-concentration mixed electrolyte is composed of an aqueous solution of tris (trifluoromethanesulfonyl) aluminum and phosphoric acid, has a wide electrochemical stability window, and can inhibit hydrogen evolution side reaction and surface passivation of an aluminum negative electrode.

The invention provides a terpolymer donor material and a preparation method and application thereof.The terpolymer donor material comprises a D-A alternating copolymer and a third unit introduced into the D-A alternating copolymer, and the third unit contains a thiazolobenzothiophene group or a benzodithiazole group; according to the ternary polymerization donor material, a thiazolobenzothiophene group or a benzodithiazole structure is introduced into a main chain of a polymer donor to prepare a series of novel polymer donor materials, and the unique micro D-A charge transfer characteristic of the novel polymer donor material effectively optimizes polymer electron delocalization distribution, promotes intramolecular charge transfer and improves the carrier mobility of the material.

The invention discloses a method for in-situ construction of a polymer electrolyte of an anionic confinement network and application of the polymer electrolyte, and belongs to the technical field of lithium ion batteries. A monomer A, a monomer B and a cross-linking agent are used as polymerizable monomers for in-situ construction of the anionic confinement network, and the monomer A, the monomer B and the cross-linking agent do not show Lewis acid characteristics; in the polymerization process, due to the property difference of the monomer A, the cross-linking agent and electrons, the charge distribution condition in a polymer network is changed, so that the monomer B shows electrophilicity, namely, an anion confinement site is constructed in situ in the polymer network, a solvated structure in the polymer electrolyte is optimized, solvent molecules and lithium salt anions are confined, and the stability of the polymer electrolyte is improved. And the oxidation resistance stability of an electrolyte system is improved, the concentration polarization is reduced, the migration kinetics of lithium ions in the polymer electrolyte is improved, and the high-performance, high-energy-density and fast-charging lithium metal battery is effectively constructed.

This invention provides a multi-element doped ultra-high nickel cathode material, its preparation method, and its application. The chemical formula of the multi-element doped ultra-high nickel cathode material is LiNi. x Mn y Mo a Nb b Zr c W d O2, where 0.85≤x≤0.90, 0.03≤y≤0.08, 0.01≤a≤0.03, 0.01≤b≤0.02, 0.005≤c≤0.015, 0.005≤d≤0.015. This invention uses Mo, Nb, Zr, and W as doping elements to achieve uniform multi-element doping throughout the entire particle from the core to the surface, synergistically leveraging lattice broadening and electron delocalization: by broadening the Li interlayer spacing, it enhances Li... ＋ The diffusion coefficient is reduced by forming wide-bandgap delocalized states in Li. ＋ The insertion / extraction barrier, combined with pinning to suppress oxygen evolution, jointly achieves the fast ion conductor effect, resulting in cathode materials with superior discharge capacity, cycle stability, and rate performance.