期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 4, 页码 3352-3357出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c03087
关键词
all-solid-state; fluoride-ion batteries; cathode; XANES; nanocomposite
资金
- JST-Mirai Program, Japan [JPMJMI18E2]
- China Scholarship Council (CSC) [201806370208]
- Kyoto University
A Cu-Pb nanocomposite was designed and tested as a room-temperature cathode material for all-solid-state fluoride-ion batteries, demonstrating high performance and good cyclability. Following electrochemical pretreatment, self-generated PbF2 acted as a fast fluoride-ion conductor, enhancing the kinetics of the Cu/CuF2 phase transition process.
All-solid-state fluoride-ion batteries (FIBs) are regarded as attractive alternatives to traditional energy storage systems because of their high energy density; however, they are not applicable at room temperature owing to sluggish ion transport in both the electrolyte and electrode. In this study, a rational design of a Cu-Pb nanocomposite is reported, which was tested as a room-temperature cathode material for all-solid-state FIBs. Following electrochemical pretreatment, self-generated PbF2 could act as a fast fluoride-ion conductor and consequently enhance the kinetics of the Cu/CuF2 phase transition process upon cycling. The detailed reaction mechanism and phase transition process were verified using the X-ray absorption near edge structure. The Cu-Pb nanocomposite could realize reversible (de)fluorination at room temperature with high performance and good cyclability.
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