Cited 0 time in
Cited 59 time in
Vacancy-Driven Na+ Superionic Conduction in New Ca-Doped Na3PS4 for All-Solid-State Na-Ion Batteries
- Title
- Vacancy-Driven Na+ Superionic Conduction in New Ca-Doped Na3PS4 for All-Solid-State Na-Ion Batteries
- Authors
- Moon, Chang Ki; Lee, Hyun-Jae; Park, Kern Ho; Kwak, Hiram; Heo, Jongwook W.; Choi, Keunsu; Yang, Hyemi; Kim, Maeng-Suk; Hong, Seung-Tae; Lee, Jun Hee; Jung, Yoon Seok
- DGIST Authors
- Moon, Chang Ki; Lee, Hyun-Jae; Park, Kern Ho; Kwak, Hiram; Heo, Jongwook W.; Choi, Keunsu; Yang, Hyemi; Kim, Maeng-Suk; Hong, Seung-Tae; Lee, Jun Hee; Jung, Yoon Seok
- Issue Date
- 2018-10
- Citation
- ACS Energy Letters, 3(10), 2504-2512
- Type
- Article
- Article Type
- Article in Press
- Keywords
- RECHARGEABLE BATTERIES; ELECTROLYTES; NA3SBS4; NA11SN2PS12; PERSPECTIVE; DYNAMICS
- ISSN
- 2380-8195
- Abstract
- Mechanically sinterable sulfide Na+ superionic conductors are key to enabling room-temperature-operable all-solid-state Na-ion batteries (ASNBs) for large-scale energy storage applications. To date, few candidates can fulfill the requirement of a high ionic conductivity of ≥1 mS cm-1 using abundant, cost-effective, and nontoxic elements. Herein, the development of a new Na+ superionic conductor, Ca-doped cubic Na3PS4, showing a maximum conductivity of ∼1 mS cm-1 at 25 °C is described. Complementary analyses using conductivity measurement by the AC impedance method, 23Na nuclear magnetic resonance spectroscopy, and density functional theory calculations reveal that the aliovalent substitution of Na+ in Na3PS4 with Ca2+ renders a cubic phase with Na vacancies, which increases the activation barriers but drastically enhances Na-ion diffusion. It is demonstrated that TiS2/Na-Sn ASNBs employing Ca-doped Na3PS4 exhibit a high charge capacity of 200 mA h g-1 at 0.06C, good cycling performance, and higher rate capability than those employing undoped cubic Na3PS4. © 2018 American Chemical Society.
- URI
- http://hdl.handle.net/20.500.11750/9367
- DOI
- 10.1021/acsenergylett.8b01479
- Publisher
- American Chemical Society
- Related Researcher
-
-
Hong, Seung-Tae
Battery Materials Discovery Laboratory
-
Research Interests
Magnesium, calcium, and zinc ion batteries; lithium all-solid-state batteries; Inorganic materials discovery; Solid state chemistry; Crystallography; Mg, Ca, Zn 이온 이차전지; 리튬 전고체전지; 신 무기재료 합성; 고체화학; 결정화학
- Files:
There are no files associated with this item.
- Collection:
- Department of Energy Science and EngineeringBattery Materials Discovery Laboratory1. Journal Articles
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.