51results about "Zinc-halogen accumulators" patented technology

The invention relates to an electrolyte for synergistically stabilizing positive electrode iodine multi-electron reaction through four-combination zinc salt and a high-surface-capacity zinc-iodine soft package battery. The electrolyte comprises the four-combination zinc salt and water, in the electrolyte, the total concentration of zinc ions in the four combinations of zinc salts is 2 + / -0.2 mol / L; the four-combination zinc salt is a four-combination zinc salt; the SO4 < 2-> in the electrolyte buffers the pH value of a system, so that side reaction of a negative electrode is reduced; cH3COO <-> can be cross-linked with I3 <->, so that shuttling of polyiodide is inhibited, and reversibility of a two-electron reaction is enhanced; bromide ions Br <-> in the electrolyte are chemically combined with I < + > through isohalogen to excite four-electron reaction; the trifluoromethanesulfonate OTf <-> with strong electronegativity surrounds the positive electricity I < + > by virtue of an ion atmosphere effect, so that active water molecule attack hydrolysis failure is avoided, a synergistic stable positive electrode iodine multi-electron reaction is realized, and the high-surface-capacity zinc-iodine soft package battery is beneficial to promoting the development of the zinc-iodine battery to practical application.

The invention relates to the technical field of zinc-iodine battery electrolyte, in particular to aqueous zinc-iodine electrolyte as well as a preparation method and application thereof. The aqueous zinc-iodine battery electrolyte contains an additive and a zinc salt, the molar concentration of the additive is 0.15 M to 0.8 M, and the additive is selected from one or more of triethylamine hydrochloride, 1-butyl-1-methylpyrrolidine chloride, 1, 3-dimethylimidazole chloride, pyridine hydrochloride, aniline hydrochloride, guanidine hydrochloride and 1-ethyl-3-methylimidazole chloride. The method can directionally regulate and control zinc negative electrode deposition and iodine positive electrode reaction kinetics, realizes four-electron reversible conversion, promotes uniform deposition of zinc ions and inhibits side reactions during charging, inhibits multi-iodide shuttle and I < + > hydrolysis during discharging, and has wide application prospects in the zinc-iodine battery electrolyte industry.

This invention provides a modified positive electrode structure, a zinc-vanadium battery, and a method for preparing the same. [Solution] The zinc-vanadium battery comprises a modified positive electrode structure (including a positive electrode and a modified layer), a separator, a negative electrode, and an aqueous electrolyte. The positive electrode contains titanium. The modified layer is located on the positive electrode and contains 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of conductive agent, and 3-45 parts by weight of binder. The separator is located on the modified layer. The negative electrode contains zinc and is located on the separator. The positive electrode, modified layer, separator, and negative electrode are all in the aqueous electrolyte. In the X-ray diffraction pattern of the vanadium-based material measured by XRD using CuKα1 rays, the peak intensity at 2θ=8°±1.0° is I8, and the peak intensity at 2θ=20°±1.0° is I 20 In that case, I8 and I 20 The ratio (I8 / I 20 ) is 0 <I8 / I 20 The condition ≤ 1.4 is satisfied. Furthermore, a modified cathode structure, a method for preparing the modified cathode structure, and a method for preparing a zinc-vanadium battery are also provided.

A battery module (400) that is a static, open pool single cell battery which may have electrode elements (442, 443) of the same polarity spaced apart but electrically connected in parallel to one another and suspended from a common bus into a common electrolyte pool (405), in addition to a battery box (400) that receives a plurality of electrode elements into the common electrolyte pool for the open pool battery. The electrode elements (442, 443) are alternating cathode elements (442) and anode elements (443). A method for manufacture of the battery module is also described.

Provided herein are phosphorus battery electrolyte additive chemicals for use in aqueous batteries that prevent self-discharge in the form of corrosion and hydrogen evolution, which increases the efficiency and extends the shelf-life of the batteries.

An embodiment of the present disclosure is a composite material comprising: about 35 wt% to about 70 wt% of at least one polyethylene polymer; about 25 wt% to about 55 wt% of at least one graphite filler; and at least 50 square meters per gram (m 2 and about 2 wt % to about 15 wt % of a carbon powder filler having a BET surface area of ​​at least 0.94 grams per cubic centimeter (g / cm 3 ). 3 ), a melt flow rate (MFR) of at least 10 grams per 10 minutes (g / 10 min) measured at 190° C. and 21.6 kilograms (kg), and an environmental stress crack resistance (ESCR) of at least 500 hours. The composition has a volume electrical resistivity of less than 5 ohm-centimeters (ohm-cm) and an MFR of at least 4 g / 10 min measured at 280° C. and 21.6 kg.

This invention provides a modified positive electrode structure, a zinc-vanadium battery, and a method for preparing the same. [Solution] The zinc-vanadium battery comprises a modified positive electrode structure (including a positive electrode and a modified layer), a separator, a negative electrode, and an aqueous electrolyte. The positive electrode contains titanium. The modified layer is located on the positive electrode and contains 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of conductive agent, and 3-45 parts by weight of binder. The separator is located on the modified layer. The negative electrode contains zinc and is located on the separator. The positive electrode, modified layer, separator, and negative electrode are all in the aqueous electrolyte. In the X-ray diffraction pattern of the vanadium-based material measured by XRD using CuKα1 rays, the peak intensity at 2θ=8°±1.0° is I8, and the peak intensity at 2θ=20°±1.0° is I 20 In that case, I8 and I 20 The ratio (I8 / I 20 ) is 0 <I8 / I 20 The condition ≤ 1.4 is satisfied. Furthermore, a modified cathode structure, a method for preparing the modified cathode structure, and a method for preparing a zinc-vanadium battery are also provided.

Improved systems and methods for balancing a state of charge (SOC) of a plurality of batteries are disclosed. For example, a system may include multiple battery strings (301, 302) connected in parallel to one another through a common bus (340). Each battery string may include a power converter (321, 322) and multiple battery modules (311A...312C) connected in series. The power converter may be configured to regulate the combined power output of the battery modules. Each battery module may include multiple relays (461...464) that may be controlled to discharge, charge, and / or bypass that battery module. Collectively, the power converters of the battery strings and the relays of the battery modules may be controlled to balance the battery strings with one another and to balance the battery modules within each of the battery strings.

The invention relates to a strong coordination type electrolyte with simple components, and belongs to the technical field of zinc-iodine battery electrolyte additives, and the electrolyte only contains zinc sulfate, an additive and water; the additive comprises any one of tetramethyl guanidine hydrochloride, betaine hydrochloride, sodium bromide, trimethyl ammonium bromide and trimethyl sulfoxide bromide. According to the electrolyte, hydrolysis failure of the electrolyte is inhibited by means of a strong coordination mode and efficient complexing I < + >, only a low-concentration single additive component is needed, and the electrolyte also keeps the advantage of high ionic conductivity of a water-based electrolyte and can accelerate substance transmission in a thick electrode, so that relatively high coulombic efficiency and cycling stability are realized under high iodine surface loading capacity; the invention also provides an ampere-hour level four-electron zinc-iodine soft package battery with high surface capacity, which can break through the performance bottleneck of the existing zinc-iodine battery in the aspect of practical application.

The invention relates to a high-energy-density aqueous zinc-iodine battery and an efficient electrolyte additive, and belongs to the field of energy storage devices, and the high-energy-density aqueous zinc-iodine battery comprises zinc salt and an electrolyte additive capable of stabilizing I, the electrolyte additive is a halogenated organic compound, the molecule of the halogenated organic compound comprises at least one halogen atom and at least one polar group selected from nitro, carbonyl, imino, sulfo or hydroxyl, and the number of carbon atoms of the compound is 1-10. According to the high-energy-density aqueous zinc-iodine battery and the efficient electrolyte additive, the specific halogenated organic matter additive is introduced into the electrolyte, so that the four-electron conversion reaction mechanism (I / I / I) of iodine is successfully activated and stabilized, the discharge capacity of a traditional zinc-iodine battery is increased to 422.9 mAh g or above from about 182.9 mAh g, the specific capacity is doubled, and the energy consumption is reduced. And the energy density of the water-based zinc-iodine battery is obviously improved.

The application discloses a kind of bottle-in-bottle structure silver porous carbon composite material as zinc iodine battery positive carrier and its preparation and application in zinc iodine battery positive electrode.The bottle-in-bottle structure silver porous carbon composite material Ag@KJ600 is synthesized by ultrasonic immersion method, dried, calcined, ground with I2 in argon protection environment, sealed and heated for 12 hours to obtain Ag@KJ600 / I2.When the composite material is used as iodine positive carrier, it can chemically adsorb polyiodide formed during the cycle process, inhibit the shuttle effect of polyiodide, and further reduce the corrosion of negative zinc and the loss of active material.Ag@KJ600 / I2 active material can be applied to zinc iodine battery iodine positive electrode, and excellent electrochemical performance is shown.

Improved systems and methods for balancing a state of charge (SOC) of a plurality of batteries are disclosed. For example, a system may include multiple battery strings connected in parallel to one another through a common bus. Each battery string may include a power converter and multiple battery modules connected in series. The power converter may be configured to regulate the combined power output of the battery modules. Each battery module may include multiple relays that may be controlled to discharge, charge, and / or bypass that battery module. Collectively, the power converters of the battery strings and the relays of the battery modules may be controlled to balance the battery strings with one another and to balance the battery modules within each of the battery strings.

Provided is a terminal assembly for an electrochemical battery comprising a terminal connector; a conductive flat-plate with an electrically conducting perimeter; an electrically insulating tape member; and a terminal bipolar electrode plate. The electrically insulating tape member is in between the conductive flat-plate and the terminal bipolar electrode plate such that the electrically insulating tape member does not cover the entire surface area of the conductive flat-plate. The electrically conducting perimeter enables bi-directional uniform current flow through the conductive flat-plate between the terminal connector and the terminal bipolar electrode plate. Also provided is a battery frame member for a static rechargeable battery comprising a liquid diversion system; a gutter; a sealing member; a gas channel; and a ventilation hole. Also provided is a static rechargeable electrochemical battery comprising a pair of terminal assemblies, at least one bipolar electrode interposed between the pair of terminal assemblies, and a battery frame member.

The invention belongs to the technical field of electrochemical energy storage, and particularly discloses an aqueous zinc-iodine battery electrolyte as well as a preparation method and application thereof. The solvent contains an amphoteric nonionic surface active additive of alkyl glucoside or thioglycoside, and can form a microemulsion structure with an aqueous solution of zinc salt. The concentration of the zinc salt in the electrolyte is 0.5 mol / L to 2.0 mol / L. A hydrogen bond in the electrolyte is reconstructed through the amphoteric nonionic surface active additive of alkyl glucoside or thioglycoside, the optimized electrolyte can efficiently solve the problems of shuttling of polyiodide ions and dendritic growth of a zinc negative electrode at the same time, the capacity fading in the cycle process of the battery is reduced, the cycle life of the battery is prolonged, and the service life of the battery is prolonged. The preparation process of the battery is simple and easy to implement, the cost is relatively low, industrial production is facilitated, and the battery has a wide market application prospect.

Provided herein are phosphorus battery electrolyte additive chemicals for use in aqueous batteries that prevent self-discharge in the form of corrosion and hydrogen evolution, which increases the efficiency and extends the shelf-life of the batteries.

The invention relates to the technical field of novel energy storage batteries, and discloses a pillararene-based zinc-bromine battery positive electrode composite material and application thereof, and the positive electrode composite material comprises pillararene or functional group modified pillararene. According to the present invention, the host-guest interaction between the cavity of the pillararene and the polybromide is innovatively utilized to achieve the efficient anchoring of the bromine species, the anchoring effect is far stronger than the traditional physical adsorption, the crossing of the active bromine to the negative electrode can be substantially reduced, the shuttle effect can be efficiently inhibited, and the charge-discharge cycle stability can be improved. The pseudocapacitance capacity contributed by the pillararene is superposed with the redox capacity of bromine, so that the overall specific discharge capacity of the battery is remarkably improved.

The invention relates to the technical field of electrochemical energy storage, in particular to a static zinc-bromine battery with a multi-layer composite integrated electrode, which comprises a positive electrode end plate, a single battery unit and a negative electrode end plate which are sequentially arranged in a laminated manner, and is characterized in that the single battery unit comprises a first current collector, the multi-layer composite integrated electrode and a second current collector; the first current collector and the second current collector are respectively arranged on two opposite sides of the multi-layer composite integrated electrode; the multi-layer composite integrated electrode is formed by sequentially and alternately compositing and arranging a plurality of conductive layers and non-conductive barrier layers, and the total number of the conductive layers and the non-conductive barrier layers is not less than three. A rich three-dimensional confinement space is provided for zinc deposition through a multi-layer alternating structure of the conductive layers and the non-conductive barrier layers, and high-load and compact deposition of zinc in the conductive layers with high porosity is allowed, so that the unit area capacity of the battery is improved, and the bottleneck of low surface capacity of a traditional static battery is overcome.

The invention belongs to the technical field of electrochemical energy storage batteries, and particularly relates to a static room-temperature aqueous chlorine battery system which comprises a positive electrode, a negative electrode, a diaphragm, an electrolyte and a packaging shell, the electrolyte comprises an aqueous solvent, a supporting electrolyte and a chlorinated ionic liquid as an additive, the chlorinated ionic liquid is composed of organic cations and chloride anions, the chlorinated imidazole ionic liquid is adopted as the electrolyte additive, and a nano-cluster structure is formed through self-assembly of the chlorinated imidazole ionic liquid. The redox reaction of chlorine is locked between Cl <-> / Cl3 <-> couple, so that direct liquid-liquid conversion is realized, and the generation of gaseous Cl2 is completely avoided. The reaction potential is about 1.78 V and is lower than the oxygen evolution potential, and the decomposition side reaction of water is effectively inhibited. The battery shows high specific capacity (541.9 mAh g <-1 >), excellent rate capability and stability (10000 cycles at 10.0 A g <-1 >) and good corrosion resistance at room temperature, can be directly packaged by a commercial stainless steel shell, has high safety and environmental friendliness, and is suitable for static energy storage scenes.

The invention discloses a preparation method of an electrolyte for a semi-solid zinc-bromine battery, the semi-solid zinc-bromine battery and a preparation method of the semi-solid zinc-bromine battery, and belongs to the field of electrochemical energy storage. And additional auxiliary equipment necessary for the zinc-bromine flow battery can be saved. In the charging process, the positive electrode material can quickly adsorb elemental bromine, and the elemental bromine is uniformly stored in the positive electrode material by virtue of a homogeneous bromine complexing agent in the electrolyte; and in the discharge stage, the positive electrode material can efficiently complete the conversion reaction between Br2 and Br <->. Compared with a traditional zinc-bromine flow battery, the semi-solid-state zinc-bromine flow battery is more compact in structure, does not need to reserve a space required by electrolyte storage and flow, and can meet the requirements of scenes with limited spaces, such as household energy storage and small base station energy storage.

A cathode electrode for a Zinc Bromine Static Battery (ZBSB) apparatus (100) is disclosed. The cathode electrode includes 85-90 % by weight of a mixture of a quaternary ammonium salt fused with super P carbon to form a salt-fused super P carbon component. The cathode electrode further includes 5-12 % by weight of the super P carbon and 1-5 % by weight of a binder. The salt-fused super P carbon component, the super P carbon, and the binder are mixed together to form the cathode electrode.

An electrolyte of a static zinc-based battery, includes a) zinc bromide in molar concentration from 1.5M to 3.0M, b) tetraethylammonium bromide as a bromine complexing agent in half of the molar concentration of the zinc bromide, c) a glycol based anti-freezing agent in molar concentration from 1.0M to 2.0M, d) zinc chloride as supporting ionic conducting agent in molar concentration from 1.0M to 4.0M, and e) an additional supporting ionic conducting agent in molar concentration from about 2.0M to 4.0M. The electrolyte minimizes the self¬ discharge of the static zinc -based battery and improves the energy density of the static zinc-based battery.

A zinc-vanadium battery (1) includes a modified positive electrode structure (including a positive electrode (10) and a modified layer (12)), a separator (14), a negative electrode (16), and an aqueous electrolyte (18). The modified layer (12) on the positive electrode (10) includes 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of a conductive agent, and 3-45 parts by weight of a binder. The separator (14) is on the modified layer (12), and the negative electrode (16) is on the separator (14). The positive electrode (10), the modified layer (12), the separator (14), and the negative electrode (16) are in the aqueous electrolyte (18). In the X-ray diffraction patterns of the vanadium-based material measured by XRD using CuKα1 ray, an intensity ratio of a peak at 2θ=8°±1.0° over a peak at 2θ=20°±1.0° (denoted as I8 and I20, respectively) satisfies 0<I8 / I20≤1.4. Furthermore, the modified positive electrode structure, a method of manufacturing the modified positive electrode structure, and a method (2) of manufacturing the zinc-vanadium battery (1) are provided.

This invention relates to the field of electrochemical energy storage technology, specifically providing a high-capacity stable manganese-iodine composite material, its preparation method and application, a cathode material preparation method, a cathode sheet, and a zinc-ion battery. The manganese-iodine composite material comprises manganese oxide, iodide, and a conductive agent. To address the issue of low intrinsic conductivity of manganese oxide, the introduction of highly conductive iodide significantly improves the electronic conductivity of the composite material. The iodide, through a rapid redox reaction, constructs a three-dimensional permeable electron transport network, thereby greatly improving the electronic conductivity of the composite material. A precisely matched redox potential synergistic system is formed between the iodide and manganese oxide. This nearly overlapping electrochemical window enables a "potential relay" synergistic reaction mechanism, effectively reducing the Mn content. 4+ / Mn 3+ The activation energy barrier and reaction kinetics of the reaction. These characteristics together constitute a high-performance, highly stable aqueous zinc-manganese battery system.

According to the carbon-nitrogen host material, the preparation method of the carbon-nitrogen host material, the zinc-iodine battery positive electrode material and the zinc-iodine battery provided by the invention, a novel host material, namely a bromine-doped carbon nitride (BrCN) nanosheet, is developed by utilizing graphitized carbon-nitrogen (g-C3N4), and chemical stripping of Van der Waals two-dimensional carbon nitride (CN) is realized, so that more adsorption sites are exposed, and the adsorption efficiency is improved. And the loading capacity of iodine is improved. Besides, heteroatoms Br are introduced into the CN nanosheets to serve as Lewis base sites, in-plane pi electrons can be induced to be separated out, and therefore the adsorption capacity of the BrCN host material to non-polar iodine is remarkably improved. According to the material, the reaction reversibility and kinetics of polyiodide conversion are improved while the iodine loading capacity is remarkably improved. The application of the prepared CN host material in the zinc-iodine battery shows the huge potential of the CN host material in the aspect of improving the battery performance, and a new solution is provided for an efficient, low-cost and sustainable energy storage technology.

This invention provides a zinc-iodine battery separator based on a three-dimensional covalent organic framework, its preparation method, and its application, relating to the research of organic materials and battery energy. This invention obtains organic framework materials (COFs) from tetrakis(4-aminophenyl)methane and terephthalaldehyde ligands via a solvothermal method; the organic framework materials are then assembled with conductive materials on a substrate surface to obtain a composite separator. This composite separator has a suitable pore size, enabling rapid transport of zinc ions (Zn). 2+ Meanwhile, the three-dimensional covalent organic framework can inhibit I3. – The shuttle function. The batteries assembled from them have high capacity, long cycle life, and excellent rate performance at high current densities.

A battery module (400) that is a static, open pool single cell battery which may have electrode elements (442, 443) of the same polarity spaced apart but electrically connected in parallel to one another and suspended from a common bus into a common electrolyte pool (405), in addition to a battery box (400) that receives a plurality of electrode elements into the common electrolyte pool for the open pool battery. The electrode elements (442, 443) are alternating cathode elements (442) and anode elements (443). A method for manufacture of the battery module is also described.

The invention discloses a polyimide iodine positive electrode material with double functions of chemical adsorption and electrostatic confinement and application of the polyimide iodine positive electrode material in an aqueous zinc-iodine battery, and belongs to the technical field of aqueous zinc-iodine batteries. The polyimide iodine positive electrode material comprises a polyimide main chain with a pi conjugated structure and a positive charge group introduced into a molecular structure. Positive charge groups can effectively limit the range of polyiodide anions through electrostatic interaction, iodide ions serving as counter ions of the positive charge groups are fixed in a polyimide molecular structure and serve as an electrochemically active iodine source to participate in electrochemical reaction, and the polyimide iodine positive electrode material can be used for preparing the positive electrode material through synergism of chemical adsorption and electrostatic range limiting. The shuttle effect of the polyiodide is effectively inhibited. The polyimide iodine positive electrode material has good charge transfer capability and a confinement stabilizing effect on iodine species, and the cycling stability and the rate capability of the positive electrode material can be remarkably improved in an aqueous zinc-iodine battery.

The invention discloses a two-component electrolyte additive and application thereof in a zinc-iodine battery. The two-component electrolyte additive is prepared from dicyandiamide and N, N-dimethylacetamide according to the mass ratio of (0.10 to 2.10) to (1.74 to 5.22). Dicyandiamide and N, N-dimethylacetamide can be coupled with I < + > ions at the same time, attack of water molecules to I < + > is prevented, and the stability of I < + > is improved; in addition, dicyandiamide and N, N-dimethylacetamide can also be coupled with I3-, and dissolution and shuttling of iodine are inhibited. Through use of dicyandiamide and N, N-dimethylacetamide, the four-electron reaction of iodine can be effectively excited, and stable operation of the zinc-iodine battery under an extreme temperature condition is realized. The application method comprises the following steps: dissolving dicyandiamide, N, N-dimethylacetamide and zinc sulfate in deionized water to obtain the aqueous zinc-iodine battery electrolyte solution. The method has the advantages of low cost, easiness in manufacturing, no corrosion and the like.

This specification provides phosphorus cell electrolyte additive chemicals for use in aqueous batteries, which prevent self-discharge in the form of corrosion and hydrogen generation, improve battery efficiency, and extend storage life.

A zinc-vanadium battery includes a modified positive electrode structure (including a positive electrode and a modified layer), a separator, a negative electrode, and an aqueous electrolyte. The modified layer on the positive electrode includes 70-95 parts by weight of vanadium-based material, 3-45 parts by weight of a conductive agent, and 3-45 parts by weight of a binder. The separator is on the modified layer, and the negative electrode is on the separator. The positive electrode, the modified layer, the separator, and the negative electrode are in the aqueous electrolyte. In the X-ray diffraction patterns of the vanadium-based material measured by XRD using CuKα1 ray, an intensity ratio of a peak at 2θ=8°±1.0° over a peak at 2θ=20°±1.0° (denoted as I8 and I20, respectively) satisfies 0<I8 / I20≤1.4. Furthermore, the modified positive electrode structure, a method of manufacturing the modified positive electrode structure, and a method of manufacturing the zinc-vanadium battery are provided.