Rational Design of Benzo-Crown Ether Electrolyte Additives for High-Performance Li-O2 Batteries

Rational Design of Benzo-Crown Ether Electrolyte Additives for High-Performance Li-O2 Batteries

Advanced Energy Materials

10.1002/aenm.202301748

http://dx.doi.org/10.1002/aenm.202301748

Qi Zhang, Yuke Li, Eng Tuan Poh, Zhenxiang Xing, Mingsheng Zhang, Meng Wang, Zejun Sun, Jisheng Pan, Sai Vikrama Chaitanya Vummaleti, Jia Zhang, Wei Chen

21 August 2023

Zhang, Q., Li, Y., Poh, E. T., Xing, Z., Zhang, M., Wang, M., Sun, Z., Pan, J., Vummaleti, S. V. C., Zhang, J., & Chen, W. (2023). Rational Design of Benzo‐Crown Ether Electrolyte Additives for High‐Performance Li‐O2 Batteries. Advanced Energy Materials, 13(37). Portico. https://doi.org/10.1002/aenm.202301748

AbstractDespite theoretical predictions of exceptional gravimetric energy densities in Li‐O2 batteries (LOBs), the current research forefront faces challenges, including high charge overpotential, cathode clogging, parasitic reactions, and Li anode corrosion. Herein, benzo‐crown ethers (BCEs) with varying cavity sizes are used as electrolyte additives to exploit their strong binding toward Li+ and promote the solution growth of Li2O2 with reduced particle size. Notably, the cell with benzo‐18‐crown‐6 ether (B18C6) enables the largest discharge capacity of 14948 mAh g−1. Upon charging, these additives accelerate Li2O2 oxidation through the strong binding with Li+ and the extended electrolyte/Li2O2 interface, resulting in improved reversibility, reduced charge overpotential, and prolonged cycle life. Besides, these additives also stabilize the Li anode by regulating Li+ migration and electron exchange, reducing dendritic growth and anode corrosion. This work presents insights into the rational design of BCEs as additives for high‐performance LOBs.

Publisher Copyright

This research / project is supported by the Agency for Science, Technology and Research (A*STAR) - Accelerated Catalysis Development Platform
Grant Reference no. : A19E9a0103

This is the peer reviewed version of the following article: Zhang, Q., Li, Y., Poh, E. T., Xing, Z., Zhang, M., Wang, M., Sun, Z., Pan, J., Vummaleti, S. V. C., Zhang, J., & Chen, W. (2023). Rational Design of Benzo‐Crown Ether Electrolyte Additives for High‐Performance Li‐O2 Batteries. Advanced Energy Materials, 13(37). Portico. https://doi.org/10.1002/aenm.202301748, which has been published in final form at doi.org/10.1002/aenm.202301748 This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

https://oar.a-star.edu.sg/communities-collections/articles/20230

1614-6840
1614-6832

Institute of High Performance Computing