Abstract
All-solid-state Na-ion batteries (NIBs) that incorporate nonflammable solid-state electrolytes and an inexhaustible alkali metal offer a potential solution to the safety and cost concerns associated with conventional Li-ion batteries that use liquid electrolytes. Na-ion solid-state electrolytes (SSEs) with high ionic conductivity are the key to success for all-solid-state NIBs. Here, we report a new Na-ion SSE, Na11Sn2PSe12, with a superior grain conductivity of 3.04 mS cm−1 and a total ionic conductivity of 2.15 mS cm−1 at 25 °C. Single-crystal X-ray diffraction, first-principles phonon calculations, and the proposed bonding energy model indicate that its superior ionic conductivity stems from the presence of a high density of dispersive Na+ vacancies, three-dimensional Na-ion conduction pathways, and a low bonding energy of the Na+ ion with its neighboring atoms. Na11Sn2PSe12 is used for the first time as the electrolyte in all-solid-state Na-Sn/TiS2 battery cell, which shows excellent rate performance and delivers a high reversible capacity of 66.2 mAh (g of TiS2)−1 after 100 cycles with cycling retention of 88.3% at a rate of 0.1 C at room temperature.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 70-77 |
| Number of pages | 8 |
| Journal | Energy Storage Materials |
| Volume | 17 |
| DOIs | |
| State | Published - Feb 2019 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Energy Engineering and Power Technology
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Synthesis and understanding of Na11Sn2PSe12 with enhanced ionic conductivity for all-solid-state Na-ion battery. / Yu, Zhaoxin; Shang, Shun Li; Wang, Daiwei; Li, Yuguang C.; Yennawar, Hemant P.; Li, Guoxing; Huang, Haw Tyng; Gao, Yue; Mallouk, Thomas E.; Liu, Zi Kui; Wang, Donghai.
In: Energy Storage Materials, Vol. 17, 02.2019, p. 70-77.Research output: Contribution to journal › Article
TY - JOUR
T1 - Synthesis and understanding of Na11Sn2PSe12 with enhanced ionic conductivity for all-solid-state Na-ion battery
AU - Yu, Zhaoxin
AU - Shang, Shun Li
AU - Wang, Daiwei
AU - Li, Yuguang C.
AU - Yennawar, Hemant P.
AU - Li, Guoxing
AU - Huang, Haw Tyng
AU - Gao, Yue
AU - Mallouk, Thomas E.
AU - Liu, Zi Kui
AU - Wang, Donghai
PY - 2019/2
Y1 - 2019/2
N2 - All-solid-state Na-ion batteries (NIBs) that incorporate nonflammable solid-state electrolytes and an inexhaustible alkali metal offer a potential solution to the safety and cost concerns associated with conventional Li-ion batteries that use liquid electrolytes. Na-ion solid-state electrolytes (SSEs) with high ionic conductivity are the key to success for all-solid-state NIBs. Here, we report a new Na-ion SSE, Na11Sn2PSe12, with a superior grain conductivity of 3.04 mS cm−1 and a total ionic conductivity of 2.15 mS cm−1 at 25 °C. Single-crystal X-ray diffraction, first-principles phonon calculations, and the proposed bonding energy model indicate that its superior ionic conductivity stems from the presence of a high density of dispersive Na+ vacancies, three-dimensional Na-ion conduction pathways, and a low bonding energy of the Na+ ion with its neighboring atoms. Na11Sn2PSe12 is used for the first time as the electrolyte in all-solid-state Na-Sn/TiS2 battery cell, which shows excellent rate performance and delivers a high reversible capacity of 66.2 mAh (g of TiS2)−1 after 100 cycles with cycling retention of 88.3% at a rate of 0.1 C at room temperature.
AB - All-solid-state Na-ion batteries (NIBs) that incorporate nonflammable solid-state electrolytes and an inexhaustible alkali metal offer a potential solution to the safety and cost concerns associated with conventional Li-ion batteries that use liquid electrolytes. Na-ion solid-state electrolytes (SSEs) with high ionic conductivity are the key to success for all-solid-state NIBs. Here, we report a new Na-ion SSE, Na11Sn2PSe12, with a superior grain conductivity of 3.04 mS cm−1 and a total ionic conductivity of 2.15 mS cm−1 at 25 °C. Single-crystal X-ray diffraction, first-principles phonon calculations, and the proposed bonding energy model indicate that its superior ionic conductivity stems from the presence of a high density of dispersive Na+ vacancies, three-dimensional Na-ion conduction pathways, and a low bonding energy of the Na+ ion with its neighboring atoms. Na11Sn2PSe12 is used for the first time as the electrolyte in all-solid-state Na-Sn/TiS2 battery cell, which shows excellent rate performance and delivers a high reversible capacity of 66.2 mAh (g of TiS2)−1 after 100 cycles with cycling retention of 88.3% at a rate of 0.1 C at room temperature.
UR - http://www.scopus.com/inward/record.url?scp=85058481107&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85058481107&partnerID=8YFLogxK
U2 - 10.1016/j.ensm.2018.11.027
DO - 10.1016/j.ensm.2018.11.027
M3 - Article
AN - SCOPUS:85058481107
VL - 17
SP - 70
EP - 77
JO - Energy Storage Materials
JF - Energy Storage Materials
SN - 2405-8297
ER -