Unit cell and single battery comprising same

• Main Authors: CHOI SUNG-WON, BAE SANG-HO, KIM MIN-WOOK, KWON SOON-KWAN, JEONG HYEOK, JUNG SU TAEK, LEE, YONG-JUN
• Format: Patent
• Language: Chinese; English
• Published: 24.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

One embodiment of the present invention provides a unit cell in which a separator and an electrode are alternately stacked in the order of a lower separator, a first electrode, an upper separator, and a second electrode. An adhesive is applied to at least one surface of the electrode and the separator to bond the electrode and the separator or to bond the lower separator and the upper separator. The present invention relates to an adhesive comprising an adhesive composition comprising a copolymer and a rosin ester-based additive, the copolymer contains 60.1 wt% to 79.9 wt% of two or more repeating units (A) based on an alkyl (meth) acrylate and 20.1 wt% to 39.9 wt% of a repeating unit (B) based on a (meth) acrylate having a terminal hydroxyl group, and the adhesive composition contains 30 wt% to 70 wt% of a copolymer and 30 wt% to 70 wt% of an additive. 本发明的一个实施方式提供了一种单元电芯，其中，隔膜和电极以下隔膜、第一电极、上隔膜和第二电极的顺序交替堆叠。电极和隔膜的至少一个表面施加有粘合剂以粘合电极和隔膜或者粘合下隔膜和上隔膜。所述粘合剂包含粘合剂组合物，所述粘合剂组合物包含共聚物和基于松香酯的添加剂，所述共聚物包含60.1重量％至79.9重量％的两种以上的