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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

Cyclic voltammogram and discharge-charge curves for all-solid-state Li-O2 cell.(a) Cyclic voltammogram of cell at scan rate of 10 mV s−1 at room temperature in O2 and N2 atmosphere. (b) 1st discharge-charge curves for cell under constant current density of 10 mA g−1 in voltage range of 2.0–4.8 V at room temperature in an O2 atmosphere.
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f1: Cyclic voltammogram and discharge-charge curves for all-solid-state Li-O2 cell.(a) Cyclic voltammogram of cell at scan rate of 10 mV s−1 at room temperature in O2 and N2 atmosphere. (b) 1st discharge-charge curves for cell under constant current density of 10 mA g−1 in voltage range of 2.0–4.8 V at room temperature in an O2 atmosphere.

Mentions: A bulk-type all-solid-state Li-O2 cell (Li/LAGP/LAGP-CNT) was fabricated by using sintering process similar to the previously-reported process18. The inert atmosphere during sintering process has been optimized to avoid the decomposition of CNT and the electrode thickness was fixed around 20 μm. In this case, the mass of air electrode was about 0.5 mg in the area of Φ = 6 mm. Firstly, the potential of the electrochemical reactions in the Li/LAGP/LAGP-CNT-O2 cell at RT was investigated using cyclic voltammetry (CV) and then the discharge-charge measurements were conducted as shown in Fig. 1. CV measurement was carried out in N2 and O2 atmosphere at a scan rate of 10 mV s−1. CV curve in O2 atmosphere showed a reduction current at a potential of less than 3 V, and an anodic peak between 3.1 and 4.0 V. Compared with CV curve in N2 atmosphere, it is considered that redox reactions are derived from the ORR and decomposition of products formed by ORR. Then the cell was discharged and charged using a constant current density of 10 mA g−1 in the voltage range of 2.0–4.8 V at RT (Fig. 1b). The current density and cell capacity were normalized by the weight of CNT calculated from the weight of air electrode after sintering and the mixing ratio of LAGP and CNT. The cell initially provided a discharge voltage of 2.4 V, which gradually decreased to 2.0 V as the discharge process continued. The discharge capacity was about 1420 mAh g−1, and a recharge capacity of about 1130 mAh g−1 could be obtained when the cell was charged up to 4.8 V. These values can be recalculated to discharge and charge capacity of 120 and 96 μAh cm−2, respectively, at the current density of 0.85 μA cm−2. This voltage profile in the constant current condition matches the result obtained by CV measurement. These redox potentials are consistent with the reported potentials for ORR and OER2819.


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

Kitaura H, Zhou H - Sci Rep (2015)

Cyclic voltammogram and discharge-charge curves for all-solid-state Li-O2 cell.(a) Cyclic voltammogram of cell at scan rate of 10 mV s−1 at room temperature in O2 and N2 atmosphere. (b) 1st discharge-charge curves for cell under constant current density of 10 mA g−1 in voltage range of 2.0–4.8 V at room temperature in an O2 atmosphere.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f1: Cyclic voltammogram and discharge-charge curves for all-solid-state Li-O2 cell.(a) Cyclic voltammogram of cell at scan rate of 10 mV s−1 at room temperature in O2 and N2 atmosphere. (b) 1st discharge-charge curves for cell under constant current density of 10 mA g−1 in voltage range of 2.0–4.8 V at room temperature in an O2 atmosphere.
Mentions: A bulk-type all-solid-state Li-O2 cell (Li/LAGP/LAGP-CNT) was fabricated by using sintering process similar to the previously-reported process18. The inert atmosphere during sintering process has been optimized to avoid the decomposition of CNT and the electrode thickness was fixed around 20 μm. In this case, the mass of air electrode was about 0.5 mg in the area of Φ = 6 mm. Firstly, the potential of the electrochemical reactions in the Li/LAGP/LAGP-CNT-O2 cell at RT was investigated using cyclic voltammetry (CV) and then the discharge-charge measurements were conducted as shown in Fig. 1. CV measurement was carried out in N2 and O2 atmosphere at a scan rate of 10 mV s−1. CV curve in O2 atmosphere showed a reduction current at a potential of less than 3 V, and an anodic peak between 3.1 and 4.0 V. Compared with CV curve in N2 atmosphere, it is considered that redox reactions are derived from the ORR and decomposition of products formed by ORR. Then the cell was discharged and charged using a constant current density of 10 mA g−1 in the voltage range of 2.0–4.8 V at RT (Fig. 1b). The current density and cell capacity were normalized by the weight of CNT calculated from the weight of air electrode after sintering and the mixing ratio of LAGP and CNT. The cell initially provided a discharge voltage of 2.4 V, which gradually decreased to 2.0 V as the discharge process continued. The discharge capacity was about 1420 mAh g−1, and a recharge capacity of about 1130 mAh g−1 could be obtained when the cell was charged up to 4.8 V. These values can be recalculated to discharge and charge capacity of 120 and 96 μAh cm−2, respectively, at the current density of 0.85 μA cm−2. This voltage profile in the constant current condition matches the result obtained by CV measurement. These redox potentials are consistent with the reported potentials for ORR and OER2819.

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