In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2022-02, No. 4 ( 2022-10-09), p. 534-534
Abstract:
The development of a cathode for solid-state lithium-oxygen batteries has been hindered in practice by a low capacity and limited cycle life despite their potential for high energy density. Here, a previously unexplored strategy is proposed wherein the cathode delivers a specific capacity of 200 milliampere hour per gram over 665 discharge/charge cycles, while existing cathodes achieve only ~50 milliampere hour per gram and ~100 cycles. A highly conductive mixed ionic-electronic conductors (MIECs) are designed as a carbon-free cathode by first-principles calculations with a density functional theory (DFT) and nudged elastic band (NEB) to avoid the degradation associated with carbonaceous materials, implying an improvement in stability during the electrochemical cycling [1]. In addition, water vapor is added into the main oxygen gas as an additive to change the discharge product from growth-restricted lithium peroxide to easily grown lithium hydroxide, resulting in a significant increase in capacity [2] . Thus, the proposed strategy is effective for developing reversible solid-state lithium-oxygen batteries with high energy density. We will discuss on the systematic materials design and their electrochemical properties for solid-state lithium-oxygen batteries at the meeting. References [1] Sang Bok Ma et al. , Advanced Energy Materials , 10 (2020) 2001767. [2] Mokwon Kim et al. , Science Advances , in press. Figure 1
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2022-024534mtgabs
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2022
detail.hit.zdb_id:
2438749-6
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