Electronics and Telecommunications Research Institute

Doo-Hyeb Youn

Hyun-Tak Kim

Kwang-Yong Kang

Byung-Gyu Chae

Sung-Lyul Maeng

Gyung-Ock Kim

Sun-Jin Yun

Yong-Wook Lee

Bong-Jun Kim

Jung-Wook Lim

Provided is a lithium secondary battery including a discharge unit capable of delaying or preventing a battery explosion. The lithium secondary battery includes a discharge unit disposed parallel to a battery body. The discharge unit includes a first electrode connected to a positive electrode of the battery body, a second electrode connected to a negative electrode of the battery body, and a discharge material film, disposed between the first electrode and the second electrode, inducing a abrupt discharge above a predetermined temperature. The discharge material film, e.g., a abrupt metal-insulator transition (MIT) material film can induce a abrupt discharge, thereby preventing or delaying a battery explosion.

Lithium secondary battery including discharge unit

The abrupt metal-insulator transition device includes: an abrupt metal insulator transition material layer including an energy gap of less than or equal to 2 eV and holes within a hole level; and two electrodes contacting the abrupt metal-insulator transition material layer. Here, each of the two electrodes is formed by thermally treating a stack layer of a first layer formed on the abrupt metal-insulator transition material layer and comprising Ni or Cr, a second layer formed on the first layer and comprising In, a third layer formed on the second layer and comprising Mo or W, and a fourth layer formed on the third layer and comprising Au.

Devices using abrupt metal-insulator transition layer and method of fabricating the device

Growing community of inventors

Daejeon, South Korea

Doo-Hyeb Youn