| Title |
Effect of Preparation Methods on the Electrochemical Performance of All-solid-state Li-S Batteries |
| Authors |
최한울(Han Ul Choi); 진주성(Ju Sung Jin); 임형태(Hyung-tae Lim) |
| DOI |
https://doi.org/10.3365/KJMM.2017.55.7.503 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
all-solid-state batteries; lithium-sulfur batteries; sulfur composite cathode |
| Abstract |
All-solid-state Li-S batteries were fabricated with lithium silicide anodes (Li4.4Si), sulfide-based glass electrolyte (Li2S-P2S5), and a sulfur composite cathode. The sulfur based composite cathode was prepared using two methods; (Case 1) mortar-mixing and (Case 2) planetary ball milling at a rotation speed of 370 rev/min for 15 min. SEM analysis results indicated that the `Case 2` method improved the distribution of sulfur, carbon and solid electrolyte particles, with a reduction in particle size. This effect was reflected in impedance spectra, and eventually in charge-discharge capacity: the electrode/electrolyte interface resistance was reduced so that the average charge-discharge capacities increased with the `Case 2` cathode. Thus, the present work indicates the method of preparing the sulfur composite cathode profoundly affects the performance of solid state Li-S batteries. (Received December 19, 2016; Accepted February 24, 2017) |