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A sandwich-structured composite separator integrating ion selectivity and multi-size sieving capabilities has been developed. Aqueous zinc-ion batteries benefit from this ion modulation strategy, which effectively prevents the migration of undesired ions, non-uniform Zn2+ transport, and passivation/corrosion reactions caused by SO42−/H2O. These issues typically lead to capacity degradation and shortened cycle life. By sequentially modifying a glass fiber separator with bacterial cellulose and Ti0.87O2 nanosheets, the Zn2+ flux is effectively homogenized, while the migration of harmful ions to the zinc anode surface is suppressed. Negatively charged Ti0.87O2 nanosheets with Ti vacancies contribute to a high Zn2+ transference number, accelerated desolvation, and provide atomic-scale ion-sieving capabilities. Notably, Zn||Zn symmetric cells equipped with this novel separator exhibit an extended cycling life at 1 mA cm−2/1 mAh cm−2 and enable dense, dendrite-free zinc deposition at 4 mA cm−2 / 8 mAh cm−2. Furthermore, Zn||V2O5 full cells deliver a high specific capacity of 278.9 mAh g−1 at 1 A g−1, while high-mass-loading Zn/I2 full cells retain 97.1% of their capacity after 1600 cycles at 2 A g−1. This ion modulation strategy offers valuable insights for the rational design and modification of separators towards dendrite-free metal batteries.

権利情報:

• In Copyright
  

  This is the peer reviewed version of the following article: H. Tan, C. Wang, X. Li, et al. “ A Multiscale Ion-Sieving Separator Toward Long-Cycling Aqueous Zinc-Based Batteries.” Small 21, no. 51 (2025): e10596, which has been published in final form at https://doi.org/10.1002/smll.202510596. 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.

キーワード: Multiscale sieving, Nanosheets, Vacancy, Zinc-based batteries

刊行年月日: 2025-11-03

出版者: Wiley

掲載誌:

• Small (ISSN: 16136810) vol. 21 issue. 51 e10596

研究助成金:

• Natural Science Foundation of Hubei Province 2024AFB463

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6107

公開URL: https://doi.org/10.1002/smll.202510596

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更新時刻: 2026-04-30 12:01:11 +0900

MDRでの公開時刻: 2026-11-03 08:28:34 +0900