Cellulose composite membranes induced by multiple hydrogen bonds as lightweight current collectors for high-performance batteries
Abstract While reducing current collector thickness improves battery energy density, further thinning commercial collectors compromises mechanical integrity and increases manufacturing costs. Here, we overcome these limitations by developing a lightweight (1.23 mg·cm-2), cost-effective cellulose com...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-04-01
|
| Series: | Communications Materials |
| Online Access: | https://doi.org/10.1038/s43246-025-00802-6 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Abstract While reducing current collector thickness improves battery energy density, further thinning commercial collectors compromises mechanical integrity and increases manufacturing costs. Here, we overcome these limitations by developing a lightweight (1.23 mg·cm-2), cost-effective cellulose composite membrane (CCM) via solution casting from an alkali/urea solvent. This CCM, composed of modified carbon nanotubes and natural cellulose, exhibits high electrochemical stability and flexibility, serving as both cathode and anode current collectors. CCM-containing batteries show 99.40% capacity retention after 500 cycles at 3 C. Replacing commercial collectors with CCM reduced their battery proportion to 6.23% and increased gravimetric energy density by 41.32%, while also reducing current collector costs by 50.36%. The CCM, produced through regenerated cellulose technology, is suitable for industrial-scale production, offering a strategy to enhance battery energy density with lightweight, low-cost current collectors. |
|---|---|
| ISSN: | 2662-4443 |