60results about How to "Enhanced electrochemical window" patented technology

The invention belongs to the technical field of batteries, in particular to an integrated all-solid-state lithium metal battery, including the positive electrode, a negative electrode and an organic-inorganic composite solid electrolyte disposed between the positive electrode and the negative electrode, the negative electrode is made of metal lithium, the organic-inorganic composite solid electrolyte comprises polyethylene oxide, an electrolyte and ceramic nanowires uniformly dispersed in the polyethylene oxide, and an adhesive in the positive electrode comprises a mixture of the polyethyleneoxide and the electrolyte. Compared with the prior art, the organic-inorganic composite solid electrolyte with high ionic conductivity and high mechanical strength can be obtained by uniformly dispersing ceramic nanowires in polyethylene oxide (PEO); Furthermore, the binder in the cathode contains the mixture of polyethylene oxide and electrolyte, which effectively ensures the ion transport in the cathode and the good contact of the interface, so as to obtain the integrated all-solid-state lithium metal battery with high safety and excellent electrochemical performance.

The invention discloses a zwitter-ion-containing all-solid-state polymer electrolyte membrane, and a preparation method and use thereof. An all-solid-state polymer electrolyte disclosed by the invention is prepared from poly(methyl hydrogen silicomethane), N,N-dimethylallylamine, allyl capped polyether, 1,3-propyl sultone, lithium salt and a cross-linking agent. The preparation method comprises the following steps of: sufficiently mixing PHMS, PEO with DMAA in methylbenzene, and reacting by adding a chloroplatinic acid catalyst; reacting a prepared product with 1,3-PS again; and, mixing the lithium salt and the cross-linking agent in the reacted product in an acetonitrile solvent, crosslinking and forming a membrane in a vacuum oven after sufficiently stirring, and then, obtaining the zwitter-ion-containing all-solid-state polymer electrolyte membrane. The conductivity of the zwitter-ion-containing all-solid-state polymer electrolyte disclosed by the invention is greatly increased; the conductivity is up to 3.39*10<-4>Scm<-1>; an electrochemical window is beyond 5 V; and thus, the zwitter-ion-containing all-solid-state polymer electrolyte can be used for a lithium secondary battery.

The invention discloses a preparation method of a polymer-added composite cathode and application of the composite cathode in a solid-state battery. The composite cathode is characterized by comprising a composite cathode pole piece and a solid-state electrolyte material, wherein the composite cathode pole piece is prepared from a cathode active material, an additive, a conductive agent and a binder; the solid-state electrolyte material is prepared from a high-molecular polymer with a long chain segment, lithium salt conducting a coordination reaction with the high-molecular polymer, and a fast ion conductor. The invention also discloses a preparation method of the polymer-added composite cathode applied to a solid-state lithium battery. The preparation method is characterized by comprising the following steps: preparing a cathode pole piece, preparing a solid-state electrolyte membrane. The preparation method disclosed by the invention has the following advantages: the arrangement regularity of polyoxyethylene molecular chains is damaged by the effect among the molecular chains of several polymers, the glass-transition temperature is lowered, the crystal formation is inhibited, and the ionic conductance is enhanced.

The invention relates to the field of lithium ion batteries and especially relates to an all-solid-state polymer electrolyte containing high-concentration lithium salt and a preparation method thereof. The all-solid-state polymer electrolyte is made of the lithium salt and a polyvinylidene fluoride-hexafluoropropylene copolymer, and a content of the lithium salt is greater than 50wt.%. The preparation method comprises the following steps: (1) uniformly mixing the polyvinylidene fluoride-hexafluoropropylene copolymer, the lithium salt and a solvent to obtain a precursor solution; and (2) coating a clean and smooth substrate with the precursor solution, forming a film under a ventilation condition, and finally carrying out vacuum drying to obtain the all-solid-state polymer electrolyte. Theall-solid-state polymer electrolyte disclosed by the invention is simple to prepare, relatively low in cost, high in room-temperature ionic conductivity, high in electrochemical window and high in lithium ion transference number, and can be used as the electrolyte of a lithium ion battery.

The invention provides a preparation method of composite polymer electrolyte. The preparation method comprises the following steps: (A) mixing a polymer matrix, an alkali metal salt and a solvent to obtain a mixed solution; mixing a sulfide electrolyte raw material with the solvent; heating and stirring; reacting to obtain sulfide electrolyte precursor slurry; (B) mixing the mixed solution with the sulfide electrolyte precursor slurry to obtain a composite electrolyte solution; and (C) after drying the composite electrolyte solution, carrying out heat treatment to obtain the composite polymer electrolyte. The composite polymer electrolyte is prepared by adopting a liquid-phase method and sulfide electrolyte is more finely and more uniformly distributed on the polymer matrix; and finally, the composite polymer electrolyte has relatively good chemical stability and ion conductivity.

The invention relates to a flexible manometer porous metal foil electrode. The flexible manometer porous metal foil electrode comprises a flexible conductive metal layer in the middle and metal alloy layers on the two sides, and the metal alloy layers on the two sides are of a manometer porous structure. The invention further relates to a preparation method of the electrode. The preparation method includes the steps that 1, metal alloy plates with uniform structural constituents are prepared; 2, the two layers of metal alloy plates and the flexible conductive metal layer in the middle are prepared into a three-layer alloy composite plate; 3, the alloy composite plate is subjected to annealing treatment; 4, the annealed alloy composite plate is subjected to hot rolling or cold rolling; 5, the step 3 and the step 4 are repeatedly carried out till the alloy composite plate reaches a preset thickness; 6, the obtained alloy composite plate is subjected to surface grinding; 7, finish rolling is carried out till the needed thickness is reached; 8, the obtained alloy composite plate is subjected to chemical and electrochemical corrosion treatment, and the manometer porous structure is formed on the surface metal alloy layers; 9, an obtained electrode is subjected to polarization or low-temperature annealing treatment to achieve partial self-oxidation of the electrode.

The invention discloses a branched structure type lithium bis(fluorosulfonyl) imide polymer(R-(PFSILi)n) and a synthesis method and application thereof. The polymer is a polyanionic lithium salt polymer with a starlike or treelike structure and the molecular structure of the polymer is as shown in the formula (I). The structuring method of the structure comprises the following steps: selecting different polyphenols or polyols as a substrate; carrying out condensation reaction on a fluorinated monomer and the substrate under the action of an acid-binding agent; and then carrying out lithium ion exchange through a lithium salt to obtain a target molecule. Compared with a one-dimensional direct-chain fluoroalkyl sulfimide structure type polymer, the branched structure type polymer disclosed by the invention has better conductivity and excellent compatibility with anode and cathode materials with high electrochemical activity, also has high lithium ion transference number (t<+> is greater than 0.9) and high electrochemical window (>6V), and further has excellent charge and discharge performance and service life.

This invention relates to an electrolytic bath used in processing polluted water including a top cover, bottom cover, a upper base, a lower base and multiple electrodes. The two covers are enclosed mutually to form an inner cavity and electrode wiring terminals and water pipe joints are set on the two covers separately. The terminals and the base are inter-linked by adjusting screws, the two bases are adhered with adjacent electrodes, the multiple electrodes are parallel in the inner cavity of the electrolytic bath mounted with the terminals coaxially, pads are set between the electrodes.

The invention relates to a crystal type composite gel electrolyte and a preparation method and application thereof. The preparation method is characterized by comprising the following steps that (1) gelatinizing components and soluble salt are added into water, stirring is carried out to complete dissolution to form a transparent and uniform solution, and a gel precursor solution is obtained; (2)gelatinizing is carried out on the gel precursor solution obtained in the step (1) to prepare hydrogel containing saturated soluble salt; and (3) seed crystal is placed above the obtained hydrogel toobtain the crystal type composite gel electrolyte. Compared with the prior art, the preparation process is simple and efficient, materials are cheap and easy to get, the obtained composite gel electrolyte has higher mechanical strength and ionic conductivity, can be applied to energy storage devices such as super capacitors, can automatically adjust the temperature of the materials according to different temperature, even if in an extreme environment, a system can be further maintained to keep stable in short time, and important significance is achieved during dealing with fire hazard and other disasters.

The invention discloses a porous nickel and carbon compound and a preparation method of the porous nickel and carbon compound. A continuous carbon layer coats the surface of porous nickel and micro-pores are formed in the carbon layer; the carbon comprises one or more of functional groups including hydrogen, oxygen, nitrogen and the like; the preparation method of the porous nickel and carbon compound comprises the following steps: putting the porous nickel into a chemical vapor deposition device and introducing a carbon source or a mixture of the carbon source and a nitrogen source and the like at a high temperature; generating the continuous carbon layer on the surface of the porous nickel within certain time. According to the porous nickel and carbon compound, the porous nickel can have a plurality of forms including small grains, blocks or membrane-shaped objects and the like; the nickel and carbon compound can be used as a hydrogenation catalyst in different reactors; compared with pure porous nickel, the porous nickel and carbon compound has the advantages of small density, high mechanical strength, small abrasion in the reactors and controllable hydrogenation degree; the porous nickel and carbon compound can also be used as a multifunctional current collector for 1V to 4V electrochemical energy storage, and has the advantages of electrochemical capacitance higher than that of pure foam nickel and great mechanical strength and is suitable for being continuously coated.

The invention relates to the field of energy batteries and relates to a low-boron-content lithium-boron alloy electrode material for a lithium battery and application. The electrode material is prepared from the following components in percentage by mass: 85.01 to 95 % of Li; 4.99 to 9.99% of B; and 0.01 to 5% of M, wherein M is selected from at least one of Au, Ag, Si, Al, Zn, C and Mg. When theelectrode material is used as a lithium battery negative electrode material, the specific capacity of the electrode material is 2700-3400 mAh / g. With the low-boron-content lithium-boron alloy electrode material of the invention adopted, the synchronous improvement of high specific capacity and cycle life is realized.

The invention relates to an electrolyte additive, an electrolyte and a lithium battery, and belongs to the technical field of lithium batteries. The electrolyte additive comprises at least one of thecompounds shown in the structural formula I: a formula which is as shown in the specification, wherein R in the structural formula I is one of a fluorine group, a phenyl group, an alkyl group, and analkenyl group, wherein n is an integer of 1 to 5. According to the electrolyte additive, the electrolyte additive is subjected to a decomposition reaction in the electrolyte, and the obtained productgenerates a protective film on the surface of a positive electrode, so that a passivation effect is achieved, dissolution of a metal element in a positive electrode material and the collapse of the positive electrode material structure are inhibited, the electrochemical stability window of the electrolyte is improved, the working voltage range of the electrolyte is widened, and the cycling efficiency of the battery under a high voltage (for example 4.2-5.0V) can be effectively improved.

The invention relates to a preparation and detection method of a tetracycline aptamer sensor based on a screen-printed electrode. The surface of the screen-printed electrode is modified with an ionic liquid and ferroferric oxide layer by layer and then left to stand at a normal temperature until the surface is dried, and then tetracycline aptamer is fixed on the surface of the screen-printed electrode modified with a nanometer material. The preparation and detection method of the tetracycline aptamer sensor based on the screen-printed electrode well solves the problem about complicated procedures of current electrode pre-treatment, the same batch of electrodes have good uniformity and can be produced in batch, and commercialization is realized. The sensor has better sensitivity, stability and specificity and good regeneration capacity and is very suitable for situations when on-site quick detection of antibiotic residues is required; the recovery rate of the sensor meets requirements.

The invention relates to high-capacity imidazole ionic liquid as well as a preparation method and an application thereof. The structural formula of the ionic liquid is shown in the specification, in the formula, R1 is CH2(CH2)aO(CH2)bCH3, a is 0 or 1, and b is 0 or 1; R2 is CH2(CH2)cCOO(CH2)dCH3, c is 0 or 1, and d is 0 or 1; Y<-> is BF4<->, PF6<->, TFSI<->, FSI<-> or N(CN) 2<->. In the preparation of the imidazole ionic liquid, through ternary substitution, ether groups are introduced to the N-1 site of an imidazole ring, so that the viscosity of the ionic liquid is reduced; an ester group isintroduced to the N-3 site of the imidazole ring, so that the electrochemical window and the electrochemical stability of the ionic liquid are improved. The imidazole ionic liquid is used as an electrolyte additive, is applied to a lithium ion battery taking a ternary material (NCM523) as a positive electrode material, and has good safety performance and electrochemical performance.

The invention is mainly applied to the field of batteries, and particularly relates to a high-safety battery diaphragm and a preparation method thereof; more particularly, the high-safety battery diaphragm is formed by depositing a layer of inorganic oxide through an atomic layer deposition technology in advance on the surfaces of pores of a microporous diaphragm base material, and grafting voltage-sensitive organic monomers on the surface of the inorganic oxide through surface modification; the invention further relates to the high-safety battery diaphragm obtained by the method and an application of the high-safety battery diaphragm in a chemical power supply system such as a lithium ion battery and the like. The high-safety diaphragm provided by the invention not only has relatively high-temperature dimension stability, but also has the function of preventing overcharge of the battery, and has high ion conduction performance, so that the battery rate performance can be improved. Thepreparation process is simple to operate and the method is very suitable for large-scale production and application.

The invention relates to the field of lithium batteries, in particular to a solid electrolyte and a lithium battery cell with the solid electrolyte, and a lithium battery. The solid electrolyte includes LiMF<x>H<12-x>, wherein M is B, Ga, Al or a combination thereof. Compared with the existing solid electrolyte, a compound with F atoms has larger molecular volume, and thus can provide largerspace for the Li+ and improve the migration capability of lithium ions. Furthermore, the M-F bond can form a stable structure, so that the solid electrolyte can have high electrochemical window and flexibility, and the structural stability and cycle performance can be improved when lithium ions migrate rapidly. Based on the structural characteristics, the solid electrolyte can have higher shear modulus and Young's modulus.

The invention discloses a composite solid electrolyte material and a preparation method thereof. The electrolyte material comprises a non-oxygen-containing polymer matrix, an oxide electrolyte, a fluorine-containing organic lithium salt and a nitrile compound, wherein the content of the non-oxygen-containing polymer matrix is 50-60%, the content of the oxide electrolyte is 5-30%, the content of the fluorine-containing organic lithium salt is 10-30%, and the content of the nitrile compound is 10-25%. The preparation method comprises the following steps of sequentially adding the raw materials into a nitrogen-containing organic solvent, mixing and stirring to obtain a uniform suspension glue solution, casting into a polytetrafluoroethylene mold by using a tape casting method for molding, andcarrying out vacuum drying to obtain the composite solid electrolyte material. The room-temperature conductivity and the electrochemical window of the solid electrolyte are improved, and meanwhile, the mechanical property of the composite solid electrolyte membrane is improved.

The invention provides a lithium battery electrolyte, which is characterized by comprising a lithium salt, ethylene glycol dibutyl ether, a fluorine-containing organic solvent, a high and low temperature resistant additive and imidazolyl ionic liquid. The lithium battery electrolyte prepared by the invention can form a relatively stable passivation film, and the layer of passivation film is inhibited along with the prolonging of the storage time, so that the storage performance of the lithium battery is remarkably improved, and the storage life of the lithium battery is remarkably prolonged. Meanwhile, the electrolyte has a relatively low freezing point and high-temperature incombustibility, the electrolyte is endowed with very strong flame resistance at the same time, the quick charging performance of the battery can also be enhanced, and the electrolyte can be widely applied to quick-charging lithium batteries.

The invention discloses a preparation method of a polyaniline / cobalt-nickel dual hydroxide supercapacitor composite electrode material. An aniline monomer is added into a mixed water solution with nickel ion concentration of 0.2M and cobalt ion concentration of 0.4M, and stirred at the room temperature for 2h until the aniline monomer is fully dissolved to obtain an electrolyte; 50ml of the electrolyte is placed in an electrolytic cell, and compaction carbon paper or graphene paper is used as a working electrode and a counter electrode, and a saturated calomel electrode is used as a referenceelectrode to assemble a three-electrode system; cyclic voltammetry scanning at the scanning rate of 5-2,000mV / s and the voltage window of minus 1V to 1V is performed for 100-10,000 cycles; after the reaction is completed, the working electrode and the counter electrode are taken off and immersed by deionized water over night to remove impurity ions; and finally, the product is dried at a temperature of 60 DEG C for 24h to obtain the polyaniline / cobalt-nickel dual hydroxide supercapacitor composite electrode material. The method has a simple, environment friendly and reliable preparation process, wide raw material resource and low cost, and is suitable for industrial production; and the prepared electrode material has high conductivity and high electrical capacity.

This invention relates to an electrolytic bath used in processing polluted water including a top cover, bottom cover, a upper base, a lower base and multiple electrodes. The two covers are enclosed mutually to form an inner cavity and electrode wiring terminals and water pipe joints are set on the two covers separately. The terminals and the base are inter-linked by adjusting screws, the two bases are adhered with adjacent electrodes, the multiple electrodes are parallel in the inner cavity of the electrolytic bath mounted with the terminals coaxially, pads are set between the electrodes.

The present invention relates to a solid polymer electrolyte formed of a polymer matrix including a lithium ion conductor, and a method of preparing the same. The solid polymer electrolyte of the present invention can be molded in the form of a film and used in an electrochemical device such as a lithium polymer secondary battery or the like.

The invention discloses a preparation method of an organic metal compound, which at least comprises the following step: reacting a mixture containing a metal source and a heteroatom-containing organic matter to obtain the organic metal compound. The synthesis route has the advantages of easiness in operation, high conversion rate, convenience in real-time monitoring and the like. The target product generated by adopting the synthesis route has good solid-state ion conduction rate, excellent thermal stability, relatively high electrochemical window and longer all-solid-state battery cycle life.

The invention relates to pyrrolidine ionic liquid as well as a preparation method and application thereof. The structural formula of the ionic liquid is as follows: R1 is CH2 (CH2) aO (CH2) bCH3, a is 0 or 1, and b is 0 or 1; r2 is CH2 (CH2) cCN, and c is 0 or 1; y <-> is BF4 <->, PF6 <->, TFSI <->, FSI <-> or N (CN) 2 <->. According to the pyrrolidine ionic liquid, two functional groups, namely an ether group and a nitrile group, are introduced into pyrrolidine at the same time; in the preparation, through a two-step method, an ether group is introduced to a pyrrole ring, so that the viscosity of the ionic liquid is reduced; the nitrile group is introduced, so that the electrochemical window and the electrochemical stability of the ionic liquid are improved. The pyrrolidine ionic liquid is used as an electrolyte additive, is applied to a lithium ion battery taking a ternary material (NCM622) as a positive electrode material, and has good safety performance and electrochemical performance.

The invention provides a boron-containing polymer solid electrolyte, which is composed of a boron-containing polymer and a lithium salt, wherein the boron-containing polymer is a cross-linked side chain polymer obtained by condensation of polyether diol, polyether monohydric alcohol and boric acid, and has the following structural general formula defined in the specification, m and n are the contents of different repetitive units in the polymer respectively, m is more than or equal to 0 and less than or equal to 1, n is more than or equal to 0 and less than or equal to 1, m + n is 1, the segment -R1 is at least one of the following structures defined in the specification, and the segment -R2- is at least one of the following structures defined in the specification.

The invention relates to a gel electrolyte diaphragm treatment method. The method comprises the following steps of: adding an initiator into an organic solvent, and mixing them to obtain a prefabricated solution; coating the surface of a diaphragm with the prefabricated solution obtained in the previous step, and standing for 0.1-10 days to obtain a diaphragm with an initiator; and dropwise adding an electrolyte on the surface of the diaphragm with the initiator obtained in the previous step, and standing for 0.1-10 days to form a polymer gel electrolyte in situ, thereby acquiring the battery diaphragm, wherein the initiator is Lewis acid. The gel electrolyte diaphragm treatment method is simple, low in cost, practical and effective.

The invention relates to imidazole ionic liquid as well as a preparation method and application thereof. The structural formula of the ionic liquid is shown in the specification; R1 is CHCH2, R2 is CH2 (CH2) aCOO (CH2) bCH3, a is 0 or 1, and b is 0 or 1; Y <-> is BF4 <->, PF6 <->, TFSI <->, N (CN) 2 <->, FSI <-> or (FSO2) 2N <->. Functional groups in the imidazole ionic liquid are alkenyl and ester groups, and the alkenyl is introduced to improve the compatibility and stability of an electrolyte and an electrode material. In the preparation process, proper parameters are selected to introducethe ester groups, so that the electrochemical window and electrochemical stability of the ionic liquid are improved, and the conductivity can also be improved. The ionic liquid obtained by the invention is applied to a high-voltage lithium ion battery taking LiNi0.5Mn1.5O4 as a positive electrode material, and the safety, the stability and the electrochemical performance of the lithium ion batterycan be improved.

The invention discloses a method for preparing an ultra-thin nanosheet-shaped NH4V3O8 nano material under ultra-high pressure. The method comprises: step 1: adding 1-methyl-3-ethylimidazolium chloride to water, and adding ethylenediaminetetraacetic acid to form a solution mixture; step 2: adding a solvent to the solution mixture, then adding NH4VO3, and dissolving the NH4VO3 to obtain a NH4VO3 solution; step 3: performing microwave treatment on the NH4VO3 solution in a microwave generator; step 4: transferring the microwave treated NH4VO3 solution to a reaction vessel, and placing the reaction vessel in an ultra-high pressure hydrothermal reactor for hydrothermal reaction to obtain suspension; and step 5: centrifugally separating the suspension to obtain powder, washing and drying the powder to obtain the ultra-thin nanosheet-like NH4V3O8 nanomaterial. The prepared nanosheet-like NH4V3O8 material has high cycle stability and high current charge and discharge capacity when used as a positive electrode material for lithium ion batteries.

The invention belongs to the technical field of biochemical separation, and relates to a method for extracting and separating 5-hydroxymethylfurfural and fructose by using an ionic liquid aqueous two-phase system. The method includes the steps of preparing a mixed solution of the 5-hydroxymethylfurfural and the fructose, adding 1-butyl-3-methylimidazolium trifluoromethanesulfonate and sodium dihydrogen phosphate dehydrate to form the ionic liquid aqueous two-phase system, and placing the mixture in a constant temperature water bath for standing reaction; after phase separation, taking the enriched ionic liquid phase solution and the enriched inorganic salt phase solution for determining the content of the 5-hydroxymethylfurfural and the fructose, wherein the 5-hydroxymethylfurfural is extracted to the enriched ionic liquid phase, and the fructose is extracted to the enriched inorganic salt phase. The ionic liquid aqueous two-phase system is simple in operation, high in extraction rate,short in extraction time, low in energy consumption, environmentally friendly and high in efficiency. At the same time, the extracted 5-hydroxymethylfurfural has good quality. The method overcomes the shortcomings of complicated operation, high cost and high equipment requirement of the traditional extraction and separation method and high volatility and high toxicity of the traditional liquid-liquid extraction.

The present invention is mainly applied in the battery field, and specifically relates to a high-safety battery separator and a preparation method thereof. More specifically, the present invention relates to depositing a layer of inorganic The preparation method of a high-safety battery diaphragm formed by grafting a voltage-sensitive organic monomer on the surface of an inorganic oxide through surface modification. The present invention also relates to a high-safety battery diaphragm obtained by the above method and its application in lithium Application of chemical power systems such as batteries. The high-safety diaphragm of the present invention not only has high high-temperature dimensional stability, but also has the function of preventing battery overcharging, has good ion conductivity, and can improve battery rate performance. The preparation process of the invention is simple to operate and is very suitable for large-scale production and application.