Tab glue and electrochemical device

The invention discloses a tab film and an electrochemical device, the tab film comprises a first crystal form, and the abscissa of the peak appearance position of the first crystal form on the crystal face in an XRD diagram is 15.5-16.5 degrees. According to the tab glue and the electrochemical device provided with the tab glue, the external impact resistance of the tab glue and the tab sealing position where the tab glue is located can be improved through the first crystal form, so that the problem of cracking of the tab sealing position is favorably avoided. 本发明公开了一种极耳胶和电化学装置，所述极耳胶中包括第一晶型，所述第一晶型在XRD图中的晶面出峰位置的横坐标在15.5°～16.5°之间。本发明提供的极耳胶，以及设置有该极耳胶的电化学装置中，通过第一晶型能够提高极耳胶及其所在极耳密封位置的抗外界冲击能力，从而有利于避免极耳密封位置的开裂问题。