Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7990202 | Journal of Alloys and Compounds | 2018 | 29 Pages |
Abstract
This manuscript reports the preparation, characterization, and testing of stable high-capacity lithium-ion battery anodes based on graphitic carbon nitride (g-CN) nanosheets hosting ZnFe2O4 nanoparticles (ZFCN). The ZFCN is prepared by a one-pot thermal process, then supersonic cold spraying is used to rapidly deposit films with a lamellar morphology that allows enhanced capacity retention by preventing particle agglomeration. The presence of g-CN nanosheets minimizes degradation of ZnFe2O4 by providing a buffering space during the lithiation/delithiation process. The ZFCN composite anodes exhibit first reversible capacities of 1550â¯mAh·gâ1 at 50â¯mA·gâ1 and up to 934â¯mAh·gâ1 at 1000â¯mA·gâ1 after 20 cycles. The superior electrochemical performance and capacity retention (88% after 160 cycles at 100â¯mA·gâ1 relative to the first reversible capacity) are attributed to highly reversible alloying/conversion mechanisms. The combination of high performance and stability with the use of low-cost earth-abundant elements and scalable processing approaches gives this ZFCN composite immense potential for use as a stable high-performance anode material for lithium-ion batteries.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bhavana Joshi, Edmund Samuel, Tae-Gun Kim, Chan-Woo Park, Yong-Il Kim, Mark T. Swihart, Woo Young Yoon, Sam S. Yoon,