| 초록 |
Gel polymer electrolyte (GPE) is a liquid electrolyte (LE) entrapped by polymer network, which is characterized by the properties between those of liquid and solid electrolytes in terms of the ionic conductivity and the physical phase. In this talk, we focus on GPEs that are gelated in situ within cells. A mixture of LE and monomer or polymer in a liquid phase is introduced into a pre-assembled cell without electrolyte, followed by thermal gelation based on physical gelation, monomer polymerization or polymer cross-linking. Therefore, GPEs are formed omnipresent in cells, covering the pores of electrode material particles, voids between the particles, and even the pores of separators. Resultantly, different from ex situ formed GPEs, the in situ GPEs have no electrode/electrolyte contact problems. Functional GPEs are introduced as a more advanced form of GPEs, improving lithium ion transference number or capturing transition metals released from electrode materials. |
