4.8 Article

Lead-Free Double Perovskite Cs2NaErCl6: Li+ as High-Stability Anodes for Li-Ion Batteries

期刊

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 13, 期 22, 页码 4981-4987

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c01052

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资金

  1. National Natural Science Foundation of China [12064021, 51862020]
  2. National Natural Science Foundation of China-Yunnan Joint Fund [U1902222]
  3. Foundation of Yunnan Province [202001AT070037, 202101AT070104, 202101AT070097]

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This study for the first time uses a rare-earth-based double perovskite as the negative electrode material for a lithium-ion battery, showing excellent structure and cycle stability, and has the potential to be a promising anode material in the field of lithium storage applications.
Halide perovskite materials have been used in the field of lithium-ion batteries because of their excellent ion migration characteristics and defect tolerance. However, the current lead-based perovskites used for lithium-ion batteries are highly toxic, which may hinder the pace of further commercialization. Therefore, it is still necessary to develop a new type of stable and pollution-free perovskite anode material. Herein, we for the first time use a high-concentration lithium-ion doped rare-earth-based double perovskite Cs2NaErCl6:Li+ as the negative electrode material for a lithium-ion battery. Thanks to its excellent structure stability, the assembled battery also has high cycle stability, with a specific capacity of 120 mAh g-1 at 300 mA g-1 after 500 cycles with a Coulomb efficiency of nearly 100%. The introduction of a rare earth element in a lead-free double perovskite paves a new way for the development of novel promising anode materials in the field of lithium storage applications.

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