Cerium oxide-modified lithium chromium titanate as high-performance anode material for lithium-ion battery
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A novel CeO2-modified Li5Cr7Ti6O25 composite as Ti-based anode has been developed to enhance the reversible capacity of the lithium-ion battery. The results show that an amorphous CeO2 film with thickness of around 2–3 nm is wrapped on the surface of Li5Cr7Ti6O25 particles, and CeO2 modification broadens the lithium ion migration channel. CeO2-coated Li5Cr7Ti6O25 shows wonderful reversible delithiation capacity of 178.0 mAh g−1 at 400 mA g−1 after 100 cycles. The enhanced property is ascribed to the reduced polarization and enhanced lithium ion diffusion after CeO2 modification. The wonderful delithiation capacity and low cost make CeO2-coated Li5Cr7Ti6O25 a prospective anode material for a practical lithium-ion battery, and the same strategy used to develop other Ti-based anode materials with high property.
KeywordsLi5Cr7Ti6O25 Anode material Lithium-ion battery Coating
This work was supported by the Foundation of Anyang Institute of Technology, the Project of Science and Technology of the Henan Province (no. 182102210200).