51 results about "Electron transfer resistance" patented technology

The catalytic electrode of the present invention does not cause electron transfer resistance, unlike conventional catalytic electrodes coated with Nafion or the like, and thus can achieve significantly high electron transfer efficiency. Accordingly, the catalytic electrode can have high power density, and thus has excellent physical properties.

The invention discloses a double-perovskite lithium-ion battery anode material synthesized through electric field regulated selective crystallization and a preparation method of the anode material. The anode material is characterized in that the composition of the anode material is Na0.8Ba0.2Y0.9Li0.1Co0.9Zn0.1Nb0.9Mn0.1O6. The crystallization characteristic of crystals with lattice imperfection is changed by use of an applied electric field in the specific direction in a high-temperature solid-phase reaction during preparation, and cylindrical particles are formed through growing in the electric field direction; meanwhile, parts, with high surface curvature radiuses, of cylindrical particles unevenly adhere to a sintering aid to partially be adhered into continuous porous morphology. The morphology is beneficial to reduction of crystal boundary resistance and electron transfer resistance, increases the lithium-ion migration capacity and the redox reaction rate and has certain structure rigidity to form buffer for volume change; the lithium-ion battery anode material with high performance is formed through Na and Y co-occupation in position A, Ba doping in position Na, Li doping in position Y and Zn and Mn doping in position B.

The invention provides a double perovskite negative electrode material prepared through template synthesis and used for a potassium ion battery, and a preparation method thereof. The invention is characterized in that the composition of the negative electrode material is KY<0.8>Ba<0.2>Cr<0.9>Zn<0.1>Mo<0.9>Fe<0.1>O<6>; the continuous channel structure of gel is employed as a template in the process of preparation, and a double perovskite-structured product with continuous porous morphology and mutually bonded particle parts is formed, wherein such morphology is beneficial for reducing crystal boundary resistance and electron transfer resistance and accelerating potassium ion migration capability and oxidation reduction reaction rate; the double perovskite negative electrode material has certain structural rigidity, so buffering is formed for volumetric changes of the material during charging and discharging ; furthermore, due to co-occupation of position A by K and Y, electronic conductivity is improved; due to partial Ba doping at position Y, the conductivity of potassium ions is improved; Zn and Fe doping at position B can improve the stability of a perovskite structure; and thus, the potassium ion battery negative electrode material with high performance is eventually formed.

The invention relates to the technical field of electrocatalytic oxygen evolution, and discloses a porous carbon material loaded FeCo 2 S 4 The electrochemical oxygen evolution catalyst, including the following formula raw materials: (CH 3 COO) 2 Co, (CH 3 COO) 2 Fe, organic ligands, thiourea. The porous carbon material loaded with FeCo 2 S 4 The electrochemical oxygen evolution catalyst, CoFe bimetallic MOFs as a template, react with thiourea as a precursor, and thermally crack to form porous carbon-coated nano-FeCo 2 S 4 core-shell structure, FeCo 2 S 4 It has low overpotential and high half-wave potential in alkaline electrolyte, showing good oxygen evolution activity, the specific surface area of ​​shell-core structure is huge, and there are many active sites, and N doping makes carbon materials show good Conductivity reduces the electron transfer resistance of the catalyst material, and O doping increases the layer spacing in the carbon material, making the carbon material form a rich mesopore and pore structure, generating a large number of catalytic active centers, and at the same time promoting electron transfer in the catalyst layer. Fast and continuous transmission in .

The invention provides a perovskite negative electrode material prepared through template synthesis and used for a lithium ion battery, and a preparation method thereof. The invention is characterized in that the composition of the negative electrode material is La<0.7>Li<0.2>Cs<0.1>Mn<0.8>Cu<0.1> Cd<0.1>O<3>; the continuous channel structure of gel is employed as a template in the process of preparation, and a perovskite-structured product with continuous porous morphology and mutually bonded particle parts is formed, wherein such morphology is beneficial for reducing crystal boundary resistance; a continuous electron transfer network is formed, and electron transfer resistance is lowered; a contact area between the prepared perovskite negative electrode material and an electrolyte is increased, and the perovskite negative electrode material has certain structural rigidity; furthermore, through Li doping at position A, lattice imperfection is increased, so the material can improve the diffusion rate of lithium ions and can be used as a negative electrode material corresponding to a lithium-free lithium-ion-battery positive electrode material; the sintering properties of particles are improved in virtue of Cs doping; Cu and Cd doping at position B can improve the stability of a perovskite structure; and thus, the lithium ion battery negative electrode material with high performance is eventually formed.

The invention relates to a production method of a fuel cell membrane electrode assembly. The method comprises the following steps: 1, dispersing a catalyst in a mixed solvent, and carrying out a vacuum defoaming technology to prepare a catalyst slurry; 2, directly coating two sides of a proton exchange membrane with the catalyst slurry prepared in step 1, and drying the catalyst slurry to obtain a membrane electrode CCM; and 3, fixing gas diffusion layers to two sides of the membrane electrode produced in step 2, and carrying out edge sealing treatment to produce the fuel cell membrane electrode assembly. Compared with the prior art, the method disclosed in the invention has the advantages of simple process, high efficiency, no hot pressing treatment, no deformation shrinkage of the proton exchange membrane, suitableness for batch production, and good product consistence; and there is no interface effect between every catalyst layer and the proton exchange membrane, so the proton and electron transfer resistance is low, the production cost of a fell cell is effectively reduced, and the fuel cell membrane electrode assembly is suitable for heavy-current discharge vehicle piles.