Quadruple the rate capability of high-energy batteries through a porous current collector design

Yusheng Ye, Rong Xu, Wenxiao Huang, Huayue Ai, Wenbo Zhang, Jordan Otto Affeld, Andy Cui, Fang Liu, Xin Gao, Zhouyi Chen, Tony Li, Xin Xiao, Zewen Zhang, Yucan Peng, Rafael A. Vila, Yecun Wu, Solomon T. Oyakhire, Hideaki Kuwajima, Yoshiaki Suzuki, Ryuhei MatsumotoYasuyuki Masuda, Takahiro Yuuki, Yuri Nakayama, Yi Cui*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Achieving extremely fast charging yet maintaining high energy density remains a challenge in the battery field. Traditional current collectors, being impermeable to electrolytes, hinder the movement of Li+ ions and restrict the high-rate capability of thick electrodes. Here we conceptualize a porous current collector for energy-dense and extremely fast-charging batteries. This porous design allows Li+ ions to pass through both the current collector and the separator simultaneously, thereby reducing the effective Li+ transport distance by half and quadrupling the diffusion-limited C-rate capability without compromising the energy density. Multilayer pouch cells equipped with this current collector demonstrate high specific energy (276 Wh kg−1) and remarkable fast-charging capabilities at rates of 4 C (78.3% state of charge), 6 C (70.5% state of charge) and 10 C (54.3% state of charge). This porous current collector design is compatible with existing battery manufacturing processes and other fast-charging strategies, enriching battery configurations for designing next-generation batteries.

Original languageEnglish
JournalNature Energy
DOIs
Publication statusAccepted/In press - 2024
Externally publishedYes

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Ye, Y., Xu, R., Huang, W., Ai, H., Zhang, W., Affeld, J. O., Cui, A., Liu, F., Gao, X., Chen, Z., Li, T., Xiao, X., Zhang, Z., Peng, Y., Vila, R. A., Wu, Y., Oyakhire, S. T., Kuwajima, H., Suzuki, Y., ... Cui, Y. (Accepted/In press). Quadruple the rate capability of high-energy batteries through a porous current collector design. Nature Energy. https://doi.org/10.1038/s41560-024-01473-2