Probing the failure mechanism of nanoscale LiFePO? for Li-ion batteries [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 621.312 Generation, modification, storage

Thông tin xuất bản: Richland, Wash. : Oak Ridge, Tenn. : Pacific Northwest National Laboratory (U.S.) ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015

Mô tả vật lý: Size: Article No. 203902 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 265957

 LiFePO<
 sub>
 4<
 /sub>
  is a high power rate cathode material for lithium ion battery and shows remarkable capacity retention, featuring a 91% capacity retention after 3300 cycles. In this work, we use high-resolution transmission electron microscopy (HRTEM), energy dispersive x-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) to study the gradual capacity fading mechanism of LiFePO<
 sub>
 4<
 /sub>
  materials. We found that upon prolonged electrochemical cycling of the battery, the LiFePO<
 sub>
 4<
 /sub>
  cathode shows surface amorphization and loss of oxygen species, which directly contribute to the gradual capacity fading of the battery. The finding is of great importance for the design and improvement of new LiFePO<
 sub>
 4<
 /sub>
  cathode for high-energy and high-power rechargeable battery for electric transportation.
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