METHOD FOR MEASURING DISPERSION DEGREE OF CONDUCTIVE MATERIAL IN ELECTRODE FOR ELECTROCHEMICAL DEVICE

• Main Authors: RAH, Kyun-Il, YANG, Hyun-Jin, SHIN, Dong-Oh, LEE, Ki-Seok, CHOI, Byung-Hee
• Format: Patent
• Language: English; French; Korean
• Published: 26.10.2023
• Subjects: APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBEMICROSCOPY [SPM]; BASIC ELECTRIC ELEMENTS; ELECTRICITY; MEASURING; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SCANNING-PROBE TECHNIQUES OR APPARATUS; TESTING

A method for evaluating a dispersion degree of a conductive material, according to the present invention, may confirm the dispersibility of a conductive material in an electrode as a quantitative value. Specifically, an arbitrary predetermined cross section of an electrode active material layer is subjected to a visual image processing of a two-dimensional scale to define a conductive material region from an acquired result (a 2D mapping image), and to calculate the circumference and the area of a portion defined as the conductive material region, to thereby quantitatively represent a degree of dispersion of the conductive material. Un procédé d'évaluation d'un degré de dispersion d'un matériau conducteur, selon la présente invention, peut confirmer la dispersibilité d'un matériau conducteur dans une électrode sous la forme d'une valeur quantitative. Plus particulièrement, une section transversale prédéterminée arbitraire d'une couche de matériau actif d'électrode est soumise à un traitement d'image visuelle d'une échelle bidimensionnelle afin de définir une région de matériau conducteur à partir d'un résultat acquis (image de mappage 2D), et de calculer la circonférence et la surface d'une partie définie comme la région de matériau conducteur, ce qui permet de représenter quantitativement un degré de dispersion du matériau conducteur. 본 발명에 따른 도전재 분산도 평가 방법은 전극 내 도전재의 분산성을 정량적인 수치로 확인할 수 있다. 구체적으로, 전극 활물질층의 임의의 소정 단면을 2차원적 스케일의 시각적 이미지 처리하여 수득된 결과(2D mapping image)로부터 도전재 영역을 정의하고, 상기 도전재 영역으로 정의된 부분의 둘레와 면적을 산출함으로써 도전재의 분산 정도를 정량적으로 나타낼 수 있다.