Capacity recovery by transient voltage pulse in silicon-anode batteries
In the quest for high-capacity battery electrodes, addressing capacity loss attributed to isolated active materials remains a challenge. We developed an approach to substantially recover the isolated active materials in silicon electrodes and used a voltage pulse to reconnect the isolated lithium-silicon (Li<i><sub>x</sub></i>Si) particles back to the conductive network. Using a 5-second pulse, we achieved >30% of capacity recovery in both Li-Si and Si-lithium iron phosphate (Si-LFP) batteries. The recovered capacity sustains and replicates through multiple pulses, providing a constant capacity advantage. We validated the recovery mechanism as the movement of the neutral isolated Li<i><sub>x</sub></i>Si particles under a localized nonuniform electric field, a phenomenon known as dielectrophoresis.
Authors
- Wenbo Zhang (ORCID: https://orcid.org/0000-0002-0828-594X)
- Philaphon Sayavong (ORCID: https://orcid.org/0000-0001-7605-8194)
- X. R. Zheng (ORCID: https://orcid.org/0000-0002-6800-2649)
- Huaxin Gong (ORCID: https://orcid.org/0000-0002-2493-0793)
- Huayue Ai (ORCID: https://orcid.org/0009-0009-0017-8881)
- Xin Gao (ORCID: https://orcid.org/0000-0001-5360-0796)
- Yecun Wu (ORCID: https://orcid.org/0000-0001-6011-4489)
- Yufei Yang (ORCID: https://orcid.org/0000-0002-3480-095X)
- Yusheng Ye (ORCID: https://orcid.org/0000-0001-9832-2478)
- Rafael A. Vilá (ORCID: https://orcid.org/0000-0002-9458-5104)
- Xin Xiao (ORCID: https://orcid.org/0000-0003-1098-9484)
- Zhuojun Huang (ORCID: https://orcid.org/0000-0001-6236-8693)
- Satyen Biswas (ORCID: https://orcid.org/0000-0003-1721-5422)
- Yucan Peng (ORCID: https://orcid.org/0000-0001-7852-1541)
- Yi Ping Cui (ORCID: https://orcid.org/0000-0002-6103-6352)
- Rong Xu (ORCID: https://orcid.org/0000-0002-3694-595X)
- Pu Zhang (ORCID: https://orcid.org/0000-0002-4186-699X)
- Junyan Li (ORCID: https://orcid.org/0000-0001-9533-2910)
- Xin Xu (ORCID: https://orcid.org/0000-0002-5393-9412)
- Yi Cui (ORCID: https://orcid.org/0000-0001-8219-1856)
- David Boyle (ORCID: https://orcid.org/0000-0002-0452-275X)
- Chad Serrao (ORCID: https://orcid.org/0000-0003-2683-2107)
- Zhouyi Chen
Institutions
- SLAC National Accelerator Laboratory (US)
- Arizona State University (US)
- Stanford University (US)
Publication Details
- Journal
- Science
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1126/science.adn1749
- Citations
- 69
- Primary Topic
- Advancements in Battery Materials
- Type
- article
- Field-Weighted Citation Impact
- 14.40