Abstract
Highly Li-ion conductive Li6PS5Cl solid-state electrolytes (SSEs) were prepared by solid-state sintering method. The influence of sintering temperature and duration on the phase, ionic conductivity, and activation energy of Li6PS5Cl was systematically investigated. The Li6PS5Cl electrolyte with a high ionic conductivity of 3.15 × 10-3 S cm-1 at room temperature (RT) was obtained by sintering at 550 °C for just 10 min, which was more efficient taking into account such a short preparation time in comparison with other reported methods to synthesize Li6PS5Cl SSEs. All-solid-state lithium sulfur batteries (ASSLSBs) based on the Li6PS5Cl SSE were assembled by using the nano-sulfur/multiwall carbon nanotube composite combined with Li6PS5Cl as the cathode and Li-In alloy as the anode. The cell delivered a high discharge capacity of 1850 mAh g-1 at RT for the first full cycle at 0.176 mA cm-2 (∼0.1C). The discharge capacity was 1393 mAh g-1 after 50 cycles. In addition, the Coulombic efficiency remained nearly 100% during galvanostatic cycling. The experimental data showed that Li6PS5Cl was a good candidate for the SSE used in ASSLSBs.
Original language | English |
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Pages (from-to) | 42279-42285 |
Number of pages | 7 |
Journal | ACS applied materials & interfaces |
Volume | 10 |
Issue number | 49 |
Early online date | 19 Nov 2018 |
DOIs | |
Publication status | Published - 12 Dec 2018 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018 American Chemical Society.
Funding
This work was supported by Basic Science Center Program of National Natural Science Foundation of China (NSFC) under Grant No. 51788104 and NSFC projects under Grant Nos. 51572149, 51532002, 51572141 and 51625202.
Keywords
- all-solid-state battery
- argyrodite Li 6 PS 5 Cl
- lithiuma-sulfur battery
- solid-state sintering
- sulfur solid electrolyte