Efficient potential-tuning strategy through p-type doping for designing cathodes with ultrahigh energy density
Loading...
Files
Date
2020-07-27
Journal Title
Journal ISSN
Volume Title
Publisher
Oxford Academic
Abstract
Designing new cathodes with high capacity and moderate potential is the key to breaking the energy density ceiling imposed by current intercalation chemistry on rechargeable batteries. The carbonaceous materials provide high capacities but their low potentials limit their application to anodes. Here, we show that Fermi level tuning by p-type doping can be an effective way of dramatically raising electrode potential. We demonstrate that Li(Na)BCF2/Li(Na)B2C2F2 exhibit such change in Fermi level, enabling them to accommodate Li+(Na+) with capacities of 290–400 (250–320) mAh g−1 at potentials of 3.4–3.7 (2.7–2.9) V, delivering ultrahigh energy densities of 1000–1500 Wh kg−1. This work presents a new strategy in tuning electrode potential through electronic band structure engineering. © The Author(s) 2020. Creative Commons CC BY Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.
Description
Keywords
Cathodes, Electrochemistry, Tuning, Crystal doping, Anodes, Electrodes, Radioisotope batteries, Oxygen, Oxides, Transition elements
Citation
Wang, Z., Wang, D., Zou, Z., Song, T., Ni, D., Li, Z., Shao, X., Yin, W., Wang, Y., Luo, W., Wu, M., Avdeev, M., Xu, B., Shi, S., Ouyang, C., & Chen, L. (2020). Efficient potential-tuning strategy through p-type doping for designing cathodes with ultrahigh energy density. National Science Review, 7(11), 1768–1775. doi:10.1093/nsr/nwaa174