Collector, electrode structure, nonaqueous electrolyte battery, and electricity storage component

Abstract

Provided are: a collector which is able to be provided with excellent shut-down function; an electrode structure; a nonaqueous electrolyte battery; and an electricity storage component. The present invention provides a collector which comprises a resin layer on at least one surface of a conductive base. The resin layer contains a fluorine resin and conductive particles, has a thickness of 0.3-20 [mu]m, and has at least one of the characteristics (1)-(3) described below. (1) The conductive particles have an average particle diameter of 0.5-25 [mu]m, and the area occupancy of the conductive particles in the surface of the resin layer is 10-50%. (2) The surface of the resin layer has a resistance of 1.0-10 Omega at 20 DEG C and a resistance of 200-600 Omega after heating at 220 DEG C. (3) The surface of the resin layer has a resistance of 1.8-9.7 Omega at 20 DEG C and a resistance of 209-532 Omega after heating at 180 DEG C.

Description

technical field [0001] The present invention relates to a current collector, an electrode structure, a nonaqueous electrolyte battery, and power storage components (electric double layer capacitors, lithium ion capacitors, etc.) that are excellent in safety. Background technique [0002] Lithium-ion batteries used in vehicles, etc., need to be provided with a so-called shutdown function that automatically and safely stops charging and discharging in the event of an accident such as a failure, and this function is provided to a separator inside the battery. The separator is designed to melt at a temperature of about 110-140°C to block the micropores when abnormal heat is generated, and stop the battery reaction (shutdown) by blocking the entry and exit of Li ions. However, there may be cases where the internal temperature of the battery further rises due to the failure of the separator to completely shut down, or the separator melts due to an increase in the external temperat...

AI Technical Summary

Problems solved by technology

However, there may be cases where the internal temperature of the battery further rises due to the failure of the separator to completely shut down, or the separator melts due to an increase in the external temperature of the battery and an internal short circuit occurs.

In this case, the battery can no longer expect the shutdown function of the separator, and the battery will fall into a very dangerous state called thermal runaway.

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