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 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 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.

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.