Limits...
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

Cycle performance of all-solid-state Li-O2 cell with capacity limit of 500 mAh g−1 at different temperatures.(a) 1st–10th discharge-charge curves and (b) cycle performance for cell at current density of 10 mA g−1 with the charge cut-off voltage of 4.8 V at room temperature. (c) 1st–10th discharge-charge curves and (d) cycle performance for cell at current density of 50 mA g−1 with the charge cut-off voltage of 4.5 V at 80 °C. (c) 1st–20th discharge-charge curves and (d) cycle performance for cell at current density of 100 mA g−1 with the charge cut-off voltage of 4.2 V at 120 °C. Red, blue and black circles indicate the discharge capacity, charge capacity and capacity efficiency, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4543982&req=5

f4: Cycle performance of all-solid-state Li-O2 cell with capacity limit of 500 mAh g−1 at different temperatures.(a) 1st–10th discharge-charge curves and (b) cycle performance for cell at current density of 10 mA g−1 with the charge cut-off voltage of 4.8 V at room temperature. (c) 1st–10th discharge-charge curves and (d) cycle performance for cell at current density of 50 mA g−1 with the charge cut-off voltage of 4.5 V at 80 °C. (c) 1st–20th discharge-charge curves and (d) cycle performance for cell at current density of 100 mA g−1 with the charge cut-off voltage of 4.2 V at 120 °C. Red, blue and black circles indicate the discharge capacity, charge capacity and capacity efficiency, respectively.

Mentions: The cycle performance at each temperature is shown in Fig. 4. All the measurements were conducted with a capacity limit of 500 mAh g−1 in accordance with a commonly-used technique8202122. The charge cut-off voltage was set at the voltage after rise observed in Fig. 2. Figure 4a,b show the 1st–10th discharge-charge curves, and the cycle performance, respectively, using a current density of 10 mA g−1 with the charge cut-off voltage of 4.8 V at RT. The cell retained a discharge capacity of 500 mAh g−1 during 10 cycles. The discharge voltage decreased with the cycling. On the other hand, the charge voltage did not increase so much. Therefore, this degradation was not caused by the degradation of the interface between Li and LAGP. One possibility is the slightly low cycle efficiency of 80–90%, which caused gradual accumulation of discharge products, led to the decrease of ORR activity. This degradation can be mitigated by elevating the temperature to 80 °C, as shown in Fig. 4c,d. The test conditions were slightly different from the conditions at RT: the current density was 50 mA g−1 and the charge cut-off voltage was 4.5 V. The cell showed a high efficiency of 95–99% from the 4th cycle onwards, resulting in a slight degradation of the discharge voltage with cycling compared with the cell at RT. In the results shown in Fig. 4e,f, the cell was cycled at a higher temperature of 120 °C: the current density was 100 mA g−1 and the charge cut-off voltage was 4.2 V. Under these conditions, the cell also retained its discharge capacity during 20 cycles. The discharge-charge efficiency was 90–98% from the 3rd cycle to 16th cycle, then decreased. The lower efficiencies compared with that obtained at 80 °C would be caused by air incorporation due to the cell not being specially designed for the operation at high temperature.


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

Kitaura H, Zhou H - Sci Rep (2015)

Cycle performance of all-solid-state Li-O2 cell with capacity limit of 500 mAh g−1 at different temperatures.(a) 1st–10th discharge-charge curves and (b) cycle performance for cell at current density of 10 mA g−1 with the charge cut-off voltage of 4.8 V at room temperature. (c) 1st–10th discharge-charge curves and (d) cycle performance for cell at current density of 50 mA g−1 with the charge cut-off voltage of 4.5 V at 80 °C. (c) 1st–20th discharge-charge curves and (d) cycle performance for cell at current density of 100 mA g−1 with the charge cut-off voltage of 4.2 V at 120 °C. Red, blue and black circles indicate the discharge capacity, charge capacity and capacity efficiency, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f4: Cycle performance of all-solid-state Li-O2 cell with capacity limit of 500 mAh g−1 at different temperatures.(a) 1st–10th discharge-charge curves and (b) cycle performance for cell at current density of 10 mA g−1 with the charge cut-off voltage of 4.8 V at room temperature. (c) 1st–10th discharge-charge curves and (d) cycle performance for cell at current density of 50 mA g−1 with the charge cut-off voltage of 4.5 V at 80 °C. (c) 1st–20th discharge-charge curves and (d) cycle performance for cell at current density of 100 mA g−1 with the charge cut-off voltage of 4.2 V at 120 °C. Red, blue and black circles indicate the discharge capacity, charge capacity and capacity efficiency, respectively.
Mentions: The cycle performance at each temperature is shown in Fig. 4. All the measurements were conducted with a capacity limit of 500 mAh g−1 in accordance with a commonly-used technique8202122. The charge cut-off voltage was set at the voltage after rise observed in Fig. 2. Figure 4a,b show the 1st–10th discharge-charge curves, and the cycle performance, respectively, using a current density of 10 mA g−1 with the charge cut-off voltage of 4.8 V at RT. The cell retained a discharge capacity of 500 mAh g−1 during 10 cycles. The discharge voltage decreased with the cycling. On the other hand, the charge voltage did not increase so much. Therefore, this degradation was not caused by the degradation of the interface between Li and LAGP. One possibility is the slightly low cycle efficiency of 80–90%, which caused gradual accumulation of discharge products, led to the decrease of ORR activity. This degradation can be mitigated by elevating the temperature to 80 °C, as shown in Fig. 4c,d. The test conditions were slightly different from the conditions at RT: the current density was 50 mA g−1 and the charge cut-off voltage was 4.5 V. The cell showed a high efficiency of 95–99% from the 4th cycle onwards, resulting in a slight degradation of the discharge voltage with cycling compared with the cell at RT. In the results shown in Fig. 4e,f, the cell was cycled at a higher temperature of 120 °C: the current density was 100 mA g−1 and the charge cut-off voltage was 4.2 V. Under these conditions, the cell also retained its discharge capacity during 20 cycles. The discharge-charge efficiency was 90–98% from the 3rd cycle to 16th cycle, then decreased. The lower efficiencies compared with that obtained at 80 °C would be caused by air incorporation due to the cell not being specially designed for the operation at high temperature.

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