5results about How to "Control pore structure" patented technology

The application discloses a lignin-based conductive eutectic gel and a preparation method and application thereof, and belongs to the technical field of intelligent soft materials.The lignin-based conductive eutectic gel comprises the following components in proportion by weight: 20-50 parts of polymerizable monomers, 0.01-0.2 parts of a crosslinking agent, 0.01-0.15 parts of sodium lignosulfonate, 3-6 parts of modified keratin, 0.1-1 parts of an initiator, 50-90 parts of a deep eutectic solvent and 50-100 parts of water; the polymerizable monomers are acrylic acid and [2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide; and the modified keratin is polyethylene glycol-based double-end crosslinking monomers and disulfide di(p-phenylene)di(2-methyl acrylate) grafted modified keratin.The lignin-based conductive eutectic gel has excellent strain sensing performance, can be used for monitoring the movement of different parts of a human body and personal health, and has excellent adhesion performance and can be stably combined with fitness equipment.

This invention relates to the field of new materials and electrochemical energy storage materials, and discloses a polyimide-derived hierarchical porous carbon / carbon fiber composite electrode and its preparation method. The preparation method involves using carbon fiber felt as a substrate, and constructing a three-level interconnected structure of micropores, mesopores, and macropores through polyimide solution spraying, metal-organic gel template deposition, gradient carbonization, and eutectic activation processes. This invention, through template synergy and optimized activation processes, enables the constructed composite electrode to possess a unique three-level interconnected structure of micropores, mesopores, and macropores, solving the problems of limited mass transfer and insufficient active sites in traditional carbon electrodes. It can be widely applied to all-vanadium, iron-chromium, and organic flow batteries, and has significant industrial application value.

The present application relates to the technical field of catalyst preparation, and discloses a P-ZSM-5 catalyst, a preparation method thereof and application of the catalyst in LDPE catalytic cracking. The catalyst can dynamically bidirectionally regulate product distribution of low-density polyethylene (LDPE) catalytic cracking. By changing the loading amount of P, the ZSM-5 zeolite structure and acidity are regulated. In the application of the LDPE catalytic cracking reaction, 0.25P-ZSM-5 has excellent aromatic hydrocarbon yield, and 5P-ZSM-5 has the best olefin yield. The present application also includes regulation of ZSM-5 based on P and extension to different preparation methods, which can also bidirectionally regulate product distribution of LDPE catalytic cracking. The catalyst has excellent pore structure and acidity characteristics, and shows good catalytic activity and product selectivity in the reaction. The present application provides a new theoretical basis and catalytic strategy for LDPE resource utilization.

The embodiment of the invention provides a biomass charcoal negative electrode material modification method and system, and the method comprises the steps: pretreating a biomass raw material for removing impurities and controlling the particle size; pyrolyzing and carbonizing the pretreated biomass raw material to obtain biomass powder, heating to a carbonization temperature at a controllable heating rate under the protection of inert gas, and preserving heat to form primary biochar; mixing the primary biochar with an activator, and performing chemical activation treatment at an activation temperature to regulate and control a pore structure and surface properties and generate an activated product; neutralizing the activated product by using an acid solution and dissolving residual alkaline substances for post-treatment of the activated product; and mixing and drying an anchoring agent and the post-treated activation product to obtain the modified biomass charcoal negative electrode material, and the anchoring agent is selected from a lithium polysulfide compound and is used for anchoring transition metal ions in an electrolyte. According to the invention, the negative electrode interface is protected from being damaged by transition metal ions in electrochemical energy storage.

The present application relates to a kind of porous carbon microspheres preparation method, porous carbon microspheres and its application, preparation method includes: water glass powder is mixed with water and stirred uniformly to obtain water glass solution, remove metal cation in water glass solution by cation exchange resin bed layer to obtain active silicic acid aqueous solution, using alkaline solution to adjust the pH value of active silicic acid aqueous solution to neutral, then react for a certain time at a certain temperature, obtain silica-containing silica sol, silica sol is mixed with carbon source material and is evenly sprayed dry, carbonization treatment obtains carbon microsphere powder material, then etching, washing, drying are sequentially carried out, remove silica, obtain porous carbon microspheres;The porous carbon microspheres of the present application can be used as carbon matrix to prepare silicon-carbon composite negative material, reduce the volume expansion of silicon, use the silicon-carbon composite negative material to prepare negative electrode sheet and assemble into lithium ion battery, can improve the first coulomb efficiency, rate performance and cycle stability of battery.