45results about How to "There is a lot of room for improvement" patented technology

The invention provides a lanthanide rare-earth ion-based CsPbBr3-doped all-inorganic perovskite solar cell and preparation method and application thereof. The preparation method comprises the steps ofmixing lanthanide rare-earth ions into a CsPbBr3 precursor solution, spinning a surface of a titanium dioxide transmission layer by a multi-step spinning technology to prepare a uniform and compact inorganic perovskite thin film, and finally, depositing a layer of carbon back electrode on a surface of the perovskite thin film to assemble the lanthanide rare-earth ion-based CsPbBr3-doped all-inorganic perovskite solar cell. By doping the lanthanide rare-earth ions, the transmission path of photo-generated carriers in a cell device is optimized, the electron lifetime is prolonged, and the photoelectric conversion efficiency and the stability of the cell are improved; and meanwhile, the preparation method has the characteristics of simplicity, no hole transmission layer, low cost, large rare-earth element combination space and the like and is an effective mode of improving the performance of the all-inorganic perovskite solar cell and reducing the fabrication cost.

The invention discloses a multifunctional knee joint rehabilitation instrument which comprises a bearing body comprising a work surface, a shank supporting part, a thigh supporting part, a knee support and a magnetic heating device, wherein the bearing body is provided with at least two guide rail structures which are distributed on the work surface or on the two sides of the work surface in parallel; the shank supporting part is obliquely arranged on the work surface, and the end of the shank supporting part can be movably arranged on the guide rail structures and connected with a power device A; the thigh supporting part and the shank supporting part form an inverted V-shaped structure, the thigh supporting part is provided with a non-retractable portion, a retractable portion and a power device B, one end of the non-retractable portion is hinged to the bearing body, one end of the retractable portion is hinged to the end, not connected with the power device A, of the shank supporting part, and the power device B is arranged between the non-retractable portion and the retractable portion; the knee support is used for supporting a knee joint and performing the function of stretching the knee joint, and the knee support is arranged on the connection portion of a large supporting part and a small supporting part; the magnetic heating device is arranged on the bearing body through a lifting device and located above the knee support. A magnetic heating therapeutic instrument and a knee joint moving assembly are integrated, so that the multifunctional knee joint rehabilitation instrument can achieve three therapeutic methods at the same time, and time is saved.

The invention provides a high-temperature proton exchange membrane in a porous hydrogel base as well as a preparation method and an application of the membrane. The preparation method of the high-temperature proton exchange membrane comprises the following steps of: automatically-polymerizing a hydrophilic monomer or enabling the hydrophilic monomer and a hydrophilic macromolecule to form a (semi) interpenetrating network structure hydrogel film; swelling the (semi) interpenetrating network structure hydrogel film by adsorbing deionized water; and adsorbing a proton conductor aqueous solution through vacuum-freezing and drying to obtain the high-temperature proton exchange membrane in the porous hydrogel base, wherein the proton conductivity of the prepared proton exchange membrane in the porous hydrogel base can reach 0.1S.cm<-1> to 0.15S.cm<-1>. The preparation method disclosed by the invention is better than the conventional preparation method for the proton exchange membrane doped with a proton conductor, and capable of adsorbing the proton conductor to the three-dimensional network structure of the hydrogel film and firmly sealing the proton conductor by utilizing the porous structure, the swelling property, the unique adsorption and the retainability of the hydrogel film. The high-temperature proton exchange membrane in the porous hydrogel base is large in proton conductor adsorbing capacity, high in proton conductivity, wide in operation temperature range, simple and easy in preparation method, low in cost and large in improvement space.

The invention provides a transparent polyaniline counter electrode-base two-sided dye-sensitized solar cell as well as a preparation method and an application thereof. The method for preparing the two-sided dye-sensitized solar cell comprises the steps of: using an aniline monomer to form a transparent polyaniline counter electrode on a fluorine-doped tin oxide (FTO) or indium tin oxide (ITO) conductive glass matrix modified by 4-amino thiophenol by electrochemical or chemical polymerization, and then carrying out a light splitting design. The invention fully utilizes the light transmittance, the electrical conductivity and the electro-catalysis of the polyaniline counter electrode, and adopts the reasonable light splitting design to divide one beam of sunlight into two beams of light sources which vertically enter a photo-anode and the counter electrode; the polyaniline counter electrode is good in light transmittance, high in electrical conductivity and excellent in electro-catalysis activity; the preparation method is convenient and easy to perform, low in cost and large in improvement space; and the assembled two-sided dye-sensitized solar cell is high in dye excitation rate, high in excitation electron density and high in photoelectric conversion efficiency.

The invention provides a hydrogel-based medium-high temperature PEM (Proton Exchange Membrane), a preparation method thereof and the application of the hydrogel-based medium-high temperature PEM. The preparation method is characterized by comprising the following steps of: forming a SEMI-IPN/IPN (Interpenetrating Polymer Network) structure through the auto polymerization of a hydrophilic monomer or through the hydrophilic monomer and hydrophilic high polymers, adsorbing proton conductor water solution and preparing the hydrogel-based medium-high temperature PEM through vacuum drying. The proton conductivity of a synthetic hydrogel-based PEM can be up to 0.02-0.09 S.cm<-1> under 180 DEGC and anhydrous environment. The preparation method provided by the invention is different from a preparation method of the traditional PEM mixed with the proton conductor; and according to the preparation method provided by the invention, the proton conductor is adsorbed into a three-dimensional network structure of a hydrogel thin membrane by fully utilizing the unique adsorptivity, the porous structure and the retentivity of the hydrogel thin membrane and is firmly sealed. According to the hydrogel-based medium-high temperature PEM provided by the invention, the adsorbing capacity of the proton conductor is large, the proton conductivity is high, the operating temperature range is wide, the operation method is simple, convenient and easy, the cost is low, and the improvement space is large.

The invention belongs to the technical field of perovskite solar cells, and discloses a porphyrin small molecule perovskite cathode buffer layer material, a preparation method and applications thereof, wherein the porphyrin small molecule perovskite cathode buffer layer material has a structure formula represented by a formula I, M is metal ion or hydrogen, A is a conjugated unit with a polar group, Ar is a substituted or unsubstituted aromatic group, and the porphyrin small molecule perovskite cathode buffer layer material is used for preparing perovskite solar cells. According to the presentinvention, one layer of the porphyrin small molecule perovskite cathode buffer layer material can replace the C60 and BCP two-layer interface commonly used in the current literature while the performance of the device can be improved; and the porphyrin small molecule perovskite cathode buffer layer material has the water-alcohol-soluble property, can be subjected to rotary solution coating, and can substantially reduce the cost of the device. The formula I is defined in the specification.

The invention provides a fuel cell stainless steel bipolar plate preparation and surface modification method, which belongs to the technical field of fuel cells. The method comprises steps: the stainless steel bipolar plate is firstly prepared; and stainless steel bipolar plate surface modification is then carried out. After the stainless steel bipolar plate is prepared through chemical etching, with N,N-dimethyl acetamide (DMAC) as a solvent, nanocarbon/graphite as a conductive material and polyimide resin solution (PI)/ phenolic resin solution (PF) as an adhesive, a nanocarbon/PI/PF mixed coating (S1) with a carbon content of 10 to 30% and a nanocarbon/PI/PF mixed coating (S2) with a conductive material content of 40 to 70% are prepared respectively. Then, in a nitrogen atomization spray method, spray is carried out on the stainless steel bipolar plate. Finally, through low temperature hot pressing treatment, the electrical conductivity and the corrosion resistance of the coating on the ridge of the stainless steel bipolar plate are improved, and the contact resistance with carbon paper is reduced. The process is simple and efficient, the coating has good corrosion resistance and strong electrical conductivity, and the bonding force between the coating and the substrate is strong.

The invention provides a miniaturized microwave sampler, mainly composed of a ground plane on an overlapping plane of a first substrate and a second substrate and a slot-hole line formed on the ground plane; a first microstrip line formed on the surface of the first substrate and one end of the microstrip line being the input terminal of the local pulse signal; a T-shaped second microstrip line formed on the bottom of the second substrate and one end of the second microstrip line being the input terminal of the RF signal and another end of fork shape being in right-angle cross with the first microstrip and constituting a electromagnetic field coupling by the slot-hole line on the ground plane; a Magic T circuit capable of effectively reducing the size of the miniaturized microwave sampler and increasing the efficiency of the sampling signal.

The invention provides an all-weather mesoporous sensitized solar cell based on graphene quantum dots and a preparation method and an application thereof. Sugar is refluxed, heated and molten at a certain temperature to prepare graphene quantum dots eventually, and the graphene quantum dots are dispersed in water to form aqueous solution. The adjustable optical band gap, light absorption and multi-exciton generation effect of the graphene quantum dots are fully utilized, and then, an all-weather mesoporous sensitized solar cell is assembled. The graphene quantum dots have the advantages of simple preparation, stable performance, low cost and large space for improvement. The assembled all-weather mesoporous sensitized solar cell based on graphene quantum dots is of high photoelectric conversion efficiency.

The invention discloses a line transfer mechanism used for detecting an electric transmission line, which is characterized by comprising a driving device, a spanning device and a differential mechanism, wherein the driving device is used for realizing the wheel type transfer of a robot on an electric transmission line; the spanning device is matched with the driving device and realizes the spanning of an obstacle; and the differential mechanism provides power for the driving device and the spanning device. The invention has light weight, low energy consumption, strong capability of obstacle spanning and high speed of obstacle spanning, can realize walking on some lines, such as electric transmission lines and the like, can quickly span a main obstacle on the lines and is simple and practical.

The invention provides a gold nanoparticle/iron-doped tungsten oxide room-temperature formaldehyde removal catalyst as well as a preparation method and application thereof. The preparation method specifically comprises the following steps: dispersing small-size gold nanoparticles with a plasmon effect and ferric chloride into a tungsten chloride precursor ethanol solution; and preparing the gold nanoparticle/iron-doped tungsten oxide room-temperature formaldehyde removal catalyst in one step through a high-temperature and high-pressure reaction. The hole concentration and the concentration ofactive sites on the surface of the catalyst are increased by doping transition metal ions, electron and hole separation is improved through the gold nanoparticles with the plasmon effect, the catalytic performance of the gold nanoparticles/iron-doped tungsten oxide on formaldehyde is greatly improved, and meanwhile, the preparation method has the characteristics of being simple, low in cost and the like.

The invention discloses an omni-directional mobile multi-load AGV control system and a control method thereof. The omni-directional mobile multi-load AGV control system comprises a main control modulefor power supply of a power supply module, a steering control module for controlling the AGV to accurately steer, a driving control module for controlling the AGV to advance or retreat at a certain speed, a multi-cargo transferring module for controlling the AGV to move to a to-be-taken cargo position to accurately take out the articles on the cargo rack, a man-machine interaction module for displaying AGV operation state information in real time, and a communication module for facilitates communication between the main control module and a mobile terminal. The steering control module, the drive control module, the multi-cargo transferring module, the man-machine interaction module and the communication module are all electrically connected with the main control unit. The control system can perform accurate motion control on the motion process of the omni-directional multi-load AGV proposed in the existing scheme, can switch motion modes according to different motion modes, and controls the AGV to complete an accurate goods storing and taking task after the AGV arrives at a designated position.

The invention provides a metal packaging ceramic ball composite armor. The metal packaging ceramic ball composite armor comprises a framework and second metal, wherein the framework is composed of three first metal layers and ceramic balls, and gaps of the framework are filled with the second metal. The melting temperature of the first metal in the three first metal layers is higher than that of the second metal; through holes are distributed in the three first metal layers and used for being filled with infiltrated second metal to form a three-dimensional penetrating network so as to lock the first metal layers and the ceramic balls; the three first metal layers comprise a top layer, a middle layer and a bottom layer; first round holes are uniformly distributed in the lower surface of the top layer and the upper surface of the middle layer; second round holes are uniformly distributed in the lower surface of the middle layer and the upper surface of the bottom layer; the ceramic ball is embedded and fixed in the first round hole and the second round hole; the lowest point of the first round hole in the middle layer is not lower than the highest point of the second round hole in the middle layer; the first round holes and the second round holes are arranged in a non-tight manner, namely gaps exist among the round holes; and the number of the ceramic balls arranged in the second round holes at least covers the gaps of the projections of the ceramic balls in the first round holes.