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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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All-solid-state lithium-oxygen battery with high safety in wide ambient temperature range
Hirokazu Kitaura1, Haoshen Zhou1
1Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Umezono, 1-1-1, Tsukuba, 305-8568, JAPAN.
Scientific Reports
|August 22, 2015
Summary
Researchers developed a safer lithium-oxygen battery using a solid electrolyte, avoiding flammable liquids. This all-solid-state battery shows promising performance across a wide temperature range.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Growing demand for high energy storage devices necessitates safer alternatives to conventional batteries.
- Current lithium-oxygen batteries often rely on flammable liquid or polymer electrolytes, posing safety risks.
- Development of solid-state electrolytes is crucial for enhancing battery safety and stability.
Purpose of the Study:
- To investigate the feasibility of an all-solid-state lithium-oxygen battery employing an inorganic solid electrolyte.
- To evaluate the electrochemical performance and safety of the developed cell under various temperature conditions.
- To demonstrate the potential of solid-state lithium-oxygen batteries for wide-temperature applications.
Main Methods:
- Assembly of a lithium-oxygen cell utilizing Li1.575Al0.5Ge1.5(PO4)3 as the inorganic solid electrolyte.
- Testing the cell's performance in a pure oxygen atmosphere across a temperature range from room temperature to 120°C.
- Characterization of electrochemical properties including discharge capacity, charge voltage, cyclic voltammetry, cycle performance, and rate performance.
Main Results:
- The all-solid-state lithium-oxygen cell operated successfully at room temperature and high temperatures (above 80°C).
- A notable first full discharge capacity of 1420 mAh g⁻¹ at 10 mA g⁻¹ was achieved.
- The cell exhibited stable operation with charge curves predominantly below 4.2 V, indicating improved safety.
- Enhanced battery performance was observed at elevated temperatures.
Conclusions:
- The study successfully demonstrated a safe and functional all-solid-state lithium-oxygen battery using an inorganic solid electrolyte.
- The developed battery shows potential for reliable operation across a wide temperature range, addressing key safety concerns.
- This work represents a significant step towards realizing practical and safe solid-state lithium-oxygen energy storage solutions.
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