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All-solid-state lithium-oxygen battery with high safety in wide ambient temperature range.

Kitaura H, Zhou H - Sci Rep (2015)

Bottom Line: The cell works at room temperature and first full discharge capacity of 1420 mAh g(-1) at 10 mA g(-1) (based on the mass of carbon material in the air electrode) was obtained.The charge curve started from 3.0 V, and that the majority of it lay below 4.2 V.The cell also safely works at high temperature over 80 °C with the improved battery performance.

View Article: PubMed Central - PubMed

Affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Umezono, 1-1-1, Tsukuba, 305-8568, JAPAN.

ABSTRACT
There is need to develop high energy storage devices with high safety to satisfy the growing industrial demands. Here, we show the potential to realize such batteries by assembling a lithium-oxygen cell using an inorganic solid electrolyte without any flammable liquid or polymer materials. The lithium-oxygen battery using Li1.575Al0.5Ge1.5(PO4)3 solid electrolyte was examined in the pure oxygen atmosphere from room temperature to 120 °C. The cell works at room temperature and first full discharge capacity of 1420 mAh g(-1) at 10 mA g(-1) (based on the mass of carbon material in the air electrode) was obtained. The charge curve started from 3.0 V, and that the majority of it lay below 4.2 V. The cell also safely works at high temperature over 80 °C with the improved battery performance. Furthermore, fundamental data of the electrochemical performance, such as cyclic voltammogram, cycle performance and rate performance was obtained and this work demonstrated the potential of the all-solid-state lithium-oxygen battery for wide temperature application as a first step.

No MeSH data available.


Related in: MedlinePlus

1st discharge-charge curves of all-solid-state Li-O2 cell under current density of 50 mA g−1 at different temperatures.(a) Discharge-charge curves for cell at room temperature in voltage range of 1.5–5.0 V. (b) Discharge-charge curves for cell at 80 °C in the voltage range of 2.0–4.8 V. (c) Discharge-charge curves for cell at 120 °C in the voltage range of 2.0–4.8 V.
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f2: 1st discharge-charge curves of all-solid-state Li-O2 cell under current density of 50 mA g−1 at different temperatures.(a) Discharge-charge curves for cell at room temperature in voltage range of 1.5–5.0 V. (b) Discharge-charge curves for cell at 80 °C in the voltage range of 2.0–4.8 V. (c) Discharge-charge curves for cell at 120 °C in the voltage range of 2.0–4.8 V.

Mentions: The rate performance of this all-solid-state Li-O2 battery was also investigated. The current density was increased to 50 mA g−1 and the voltage region was extended to between 1.5–5.0 V (Fig. 2a). Although the overpotential increased, the cell could still be smoothly discharged and charged at this current density. A discharge capacity of 460 mAh g−1 was obtained at RT. Then, the cell performance was investigated by controlling the current density at each step to understand the discharge-charge behavior at different current densities (Figure S1a and S1b). The results showed that the cell can be initially discharged/charged in the range 2.0–4.0 V at the current densities less than or equal to 20 mA g−1, and that an extended voltage region was apparent at the current densities over 20 mA g−1. In addition, the rate performance can be enhanced by reducing the thickness of the solid electrolyte layer. The thickness was changed from 1 mm (Figure S1a and S1b) to 0.5 mm (Figure S2a and S2b). The rate performance improved significantly; for example, the discharge and charge voltages at 200 mA g−1 were in the range 2.0–4.0 V. These results indicate that the resistance of solid electrolytes is still a rate limiting factor. Therefore, improvement of lithium-ion conductivity and decreasing the thickness of the solid electrolyte layer will enhance cell performance and bring it closer to becoming a practical battery.


All-solid-state lithium-oxygen battery with high safety in wide ambient temperature range.

Kitaura H, Zhou H - Sci Rep (2015)

1st discharge-charge curves of all-solid-state Li-O2 cell under current density of 50 mA g−1 at different temperatures.(a) Discharge-charge curves for cell at room temperature in voltage range of 1.5–5.0 V. (b) Discharge-charge curves for cell at 80 °C in the voltage range of 2.0–4.8 V. (c) Discharge-charge curves for cell at 120 °C in the voltage range of 2.0–4.8 V.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4543982&req=5

f2: 1st discharge-charge curves of all-solid-state Li-O2 cell under current density of 50 mA g−1 at different temperatures.(a) Discharge-charge curves for cell at room temperature in voltage range of 1.5–5.0 V. (b) Discharge-charge curves for cell at 80 °C in the voltage range of 2.0–4.8 V. (c) Discharge-charge curves for cell at 120 °C in the voltage range of 2.0–4.8 V.
Mentions: The rate performance of this all-solid-state Li-O2 battery was also investigated. The current density was increased to 50 mA g−1 and the voltage region was extended to between 1.5–5.0 V (Fig. 2a). Although the overpotential increased, the cell could still be smoothly discharged and charged at this current density. A discharge capacity of 460 mAh g−1 was obtained at RT. Then, the cell performance was investigated by controlling the current density at each step to understand the discharge-charge behavior at different current densities (Figure S1a and S1b). The results showed that the cell can be initially discharged/charged in the range 2.0–4.0 V at the current densities less than or equal to 20 mA g−1, and that an extended voltage region was apparent at the current densities over 20 mA g−1. In addition, the rate performance can be enhanced by reducing the thickness of the solid electrolyte layer. The thickness was changed from 1 mm (Figure S1a and S1b) to 0.5 mm (Figure S2a and S2b). The rate performance improved significantly; for example, the discharge and charge voltages at 200 mA g−1 were in the range 2.0–4.0 V. These results indicate that the resistance of solid electrolytes is still a rate limiting factor. Therefore, improvement of lithium-ion conductivity and decreasing the thickness of the solid electrolyte layer will enhance cell performance and bring it closer to becoming a practical battery.

Bottom Line: The cell works at room temperature and first full discharge capacity of 1420 mAh g(-1) at 10 mA g(-1) (based on the mass of carbon material in the air electrode) was obtained.The charge curve started from 3.0 V, and that the majority of it lay below 4.2 V.The cell also safely works at high temperature over 80 °C with the improved battery performance.

View Article: PubMed Central - PubMed

Affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Umezono, 1-1-1, Tsukuba, 305-8568, JAPAN.

ABSTRACT
There is need to develop high energy storage devices with high safety to satisfy the growing industrial demands. Here, we show the potential to realize such batteries by assembling a lithium-oxygen cell using an inorganic solid electrolyte without any flammable liquid or polymer materials. The lithium-oxygen battery using Li1.575Al0.5Ge1.5(PO4)3 solid electrolyte was examined in the pure oxygen atmosphere from room temperature to 120 °C. The cell works at room temperature and first full discharge capacity of 1420 mAh g(-1) at 10 mA g(-1) (based on the mass of carbon material in the air electrode) was obtained. The charge curve started from 3.0 V, and that the majority of it lay below 4.2 V. The cell also safely works at high temperature over 80 °C with the improved battery performance. Furthermore, fundamental data of the electrochemical performance, such as cyclic voltammogram, cycle performance and rate performance was obtained and this work demonstrated the potential of the all-solid-state lithium-oxygen battery for wide temperature application as a first step.

No MeSH data available.


Related in: MedlinePlus