| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Dense NASICON-type LAGP Ceramics with 2D MoS2 Interlayer for All-solid-state Lithium Metal Batteries |
| Author(s) |
Seung Jin Baek, Eunho Cha, Dong Gyu Kim, Do-Kyung Kim |
| On-Site Speaker (Planned) |
Seung Jin Baek |
| Abstract Scope |
NASICON-type lithium aluminum germanium phosphate (Li1.5Al0.5Ge1.5(PO4)3, LAGP) is regarded as one of the most promising solid electrolyte due to good chemical stability with Li. However, a number of recent studies have raised the awareness behind the issues of mixed conducting interphase (MCI) forming between LAGP and Li interface due to the degradation of ionic conductivity and fracture of LAGP with volume change during cycling.
In this study, we made dense LAGP ceramics via modified pressureless sintering; in addition, partially reacted LAGP powders were prepared to analyze the sintering kinetics. Subsequently, we prepared MoS2-coated LAGP composite with various fabrication methods including MoS2 polishing, arranging exfoliated MoS2 nano-sheet, and applying vertically-aligned-MoS2 by chemical vapor deposition growth. Therefore, MoS2 layers form a lithiophilic interface, which prevents the formation of MCI. It is our goal to establish an approach of designing a lithiophilic interface with 2D materials for high performing all-solid-state lithium metal batteries. |