5 results about "Sulfur electrode" patented technology

本发明涉及一种锂硫电极中硫化锂的品质分析方法，作为分析锂硫活性材料中残留锂化合物的方法，所述分析方法包括：准备包括正极活性材料的电极的步骤；对所述电极进行充放电，以获取关于随容量(Specific Capacity)变化的电压(Voltage)的第一数据的步骤；以及基于所述第一数据，通过对随所述电压(V)变化的电池容量(Q)对所述电压(V)的微分值(dQ / dV)进行积分，获取并分析根据计算出的面积值而得到的数据的步骤。

The present invention relates to a sulfur electrode composition for a lithium-sulfur battery, comprising: a cellulose nanofiber binder; and an active material comprising sulfur. Thereby, the sulfur electrode for a lithium-sulfur battery of the present invention maximizes the utilization rate and conversion reaction rate of sulfur in a lithium-sulfur battery even under minimal electrolyte conditions by introducing cellulose nanofibers as a binder, and the distance between the expanded glucose chains formed due to the one-dimensional structure and electrostatic repulsion of the cellulose nanofibers promotes the interaction between the binder and lithium polysulfide (LiPS), and effectively suppresses the formation of aggregates of lithium polysulfide (LiPS). Therefore, a lithium-sulfur battery including such a sulfur electrode maintains a high active material ratio even under minimal electrolyte conditions while increasing the electrochemical conversion reaction rate, thereby improving battery performance and significantly increasing energy density.

A sulfur electrode and a method for manufacturing the same are disclosed. The method for manufacturing the sulfur electrode includes: growing carbon fibers on a surface of stainless steel; connecting the stainless steel on which the carbon fibers are grown to a cathode of a current controller in an aqueous solution in which sulfur ions are dissolved; and forming a sulfur thin film on each of surfaces of the carbon fibers grown on the surface of the stainless steel and in each of spaces between the carbon fibers by controlling a current of the current controller.

The invention discloses a composite hydrogen evolution electrode and a preparation method thereof, the composite hydrogen evolution electrode comprises a nickel substrate, the nickel substrate is provided with a nickel-sulfur alloy layer, and the nickel-sulfur alloy layer is loaded with a copper element. The preparation method comprises the following steps: placing a nickel substrate in an electroplating solution containing a nickel source and a sulfur source for electrochemical deposition, and forming a nickel-sulfur alloy layer on the nickel substrate; activating the nickel substrate on which the nickel-sulfur alloy layer is formed; and placing the activated nickel substrate in a copper plating solution for electroplating to obtain the composite hydrogen evolution electrode. The nickel-sulfur alloy is deposited on the nickel substrate, the nano-copper is deposited on the surface of the nickel-sulfur alloy, the hydrogen evolution performance of the nickel-sulfur electrode is improved by introducing the copper element, and the stability is enhanced while the overpotential is reduced.