39results about How to "Shorten the pathway of diffusion" patented technology

The present application relates to the field of building materials, and specifically discloses a super high-rise self-compacting concrete and a construction process thereof. The super high-rise jacking self-compacting concrete includes the following components in parts by weight: 395-434 parts of cement, 46-68 parts of fly ash, 65-98 parts of slag powder, 9.7-15 parts of silica fume, 12.1-17.6 parts of admixture, 165-188 parts of water, 0-324 parts of river sand, 570-842 parts of machine-made sand, and 821-861 parts of stones; the content of stone powder in the machine-made sand is ≤12%; the construction process is: S1, preparing concrete, S2, Concrete transportation and pumping, S3, curing. The super high-rise jacking self-compacting concrete of the present application has the advantages of good workability, good homogeneity, little loss over 3 hours, high crack resistance, high impermeability and strong carbonization resistance.

The invention relates to a preparation method of a ribbon type graded mesoporous nickel oxide high-specific-capacitance electrode material. The preparation method comprises the steps that nickel sulfate, guanidine hydrochloride and sodium chloride are used as raw materials, mesoporous carbon is used as a template, and then the ribbon type graded mesoporous nickel oxide high-specific-capacitance electrode material is prepared through a template method. Compared with the prior art, the preparation method has the advantages that the mesoporous carbon is used as the template, the guanidine hydrochloride is used as precipitating agents firstly without adding any surface active agents, and deionized water is adopted as a reaction solvent; the raw materials are cheap, and the ribbon type graded mesoporous nickel oxide high-specific-capacitance electrode material is nontoxic, harmless, simple in technological process, controllable in particle morphology, free from complex postprocessing processes and low in cost, and has good application prospect.

The invention provides a lithium ion conductor with a nanoscale. The lithium ion conductor comprises a mesoporous silicon material and solid solution phase particles dispersed in the mesoporous silicon material, wherein the solid solution phase particles are selected from one or more of LiBH4 solid solution phase particles, 4LiBH4-LiF solid solution phase particles, 4LiBH4-LiCl solid solution phase particles, 4LiBH4-LiBr solid solution phase particles and 4LiBH4-LiI solid solution phase particles; the mesoporous silicon material is SBA-15. The lithium ion conductor has the beneficial effects that a preparation method of the lithium ion conductor is simple and is relatively low in cost; by dispersing lithium borohydride and lithium halide in the mesoporous silicon material, the diffusion path of the ions is greatly shortened, the diffusion network channel of the ions is widened, and the phase inversion temperature of the lithium ion conductor is reduced, thus greatly improving the electrical conductivity of the lithium ion conductor.

The invention relates to a preparation method of a composite current collector, which belongs to the field of batteries. The preparation method includes: 1) Current collector pretreatment: first use ethanol, acetone and deionized water to remove the oil stains on the current collector in an ultrasonic cleaner, and dry it for later use; 2) Coating carbon slurry: first Configure the MOF solution, then place the current collector in step 1) in the solution, dry it after reaction, and wait for use; 3) Dry carbonization: place the dried current collector in step 2) in a protective atmosphere and heat it under high temperature Carbonization to obtain a current collector with a coating layer on the surface; 4) Pickling: pickling step 3) the current collector to remove non-carbon substances on the surface of the current collector to obtain a current collector with a carbon coating; 5) Drying and milling Pressing: drying and rolling the obtained current collector. In the present invention, the carbonized metal frame is used as the current collector coating after the carbonization, the coating and the substrate have strong bonding force, the coating is not easy to fall off, and the obtained battery has good cycle performance.

The invention discloses a preparation method of ferrous lithium hydrogen phosphate. The preparation method sequentially comprises the following steps of: preparing ferrite phosphoric acid mixed solution by using soluble ferrite and phosphoric acid; preparing lithium hydroxide solution by using lithium hydroxide; adding pure water into a three-opening flask, and stirring and synchronously dropwise adding the ferrite phosphoric acid mixed solution and the lithium hydroxide solution in case of normal pressure backflow in a heating way; synchronously dropwise adding the ferrite phosphoric acid mixed solution and the lithium hydroxide solution, continuously stirring, and reflowing for 2-8 hours in a heating way, and carrying out solid-liquid separating and washing; and drying the washed solid to obtain the ferrous lithium hydrogen phosphate. The preparation method has the advantages that according to the preparation method, the commercially available lithium source, phosphorus source and iron source have a heating reflow reaction in case of liquid phase under normal pressure, so that the ferrous lithium hydrogen phosphate can be obtained. The raw materials are easy to obtain, and the preparation method is easy to operate, and low in energy consumption. The ferrous lithium phosphate can be easily prepared from the ferrous lithium hydrogen phosphate, compared with the existing preparation method of the ferrous lithium hydrogen phosphate, the preparation method greatly shortens the process route, and greatly simplifies the operation steps.

The invention relates to a carbon cloth-based transition metal ion-doped trimanganese tetraoxide nanosheet array, a preparation method and application thereof. The present invention utilizes the high potential window of the manganese-based material itself as an advantage, and on this basis doped transition metal ions to modify the manganese-based material, thereby improving the electrochemical performance of the zinc-ion battery as a whole. Basic steps: first pretreat the empty carbon cloth; then grow transition metal ion-doped trimanganese tetraoxide nanosheet arrays on the empty carbon cloth by electrodeposition; finally wash and dry. The invention adopts a one-step method, which is convenient and simple, and the raw materials are conveniently obtained, with low cost and non-toxicity, which solves the problems of too many impurities in the material and cumbersome operation in the traditional technology. For the zinc-ion battery cathode material, the present invention optimizes the structure by doping the manganese-based oxide with transition metal ions, thereby improving the electrochemical performance of the battery. This provides a good idea for the selection or improvement of cathode materials for zinc-ion batteries in the future.

The invention discloses a multi-level structure combined with TiO 2 A method for preparing a composite graphene negative electrode material, comprising the following steps: using tetrabutyl titanate as a titanium source, alcohol compounds as a primary solvent, and preparing a precursor by a solvothermal method; the precursor is lower than the phase transition temperature, Transformation into phase-bound TiO with anatase and rutile phases via a two-step calcination method 2 ; Combined with TiO 2 Mix evenly with graphene and place in a secondary solvent, constant temperature, and ultrasonic treatment to obtain a three-dimensional multi-level structure of TiO 2 Composite graphene materials. A Hierarchical Structured TiO 2 The composite graphene negative electrode material is prepared by the above preparation method. A battery electrode is composed of multi-level structure combined with TiO 2 Composite graphene negative electrode material is prepared. The final material of the present invention has both nano-TiO 2 The high cycle life endowed to the battery, and the high conductivity and large current discharge ability endowed by graphene to the electrode material.

A composite positive electrode sheet for a lithium-sulfur battery in the technical field of electrochemical energy, its preparation method and application, including a nano-microporous carbon-sulfur composite material, a conductive agent and polyvinylidene fluoride; the nano-microporous carbon in the composite material The pore size is less than 0.8nm. In the present invention, the existing form S of common sublimated sulfur 8 Conversion to short-chain sulfur molecules S 2‑4 , to avoid the generation of easily soluble high-order polysulfides in the lithium-sulfur battery during the discharge process, to prevent the occurrence of the shuttle effect, and to improve the cycle stability of the lithium-sulfur battery.