We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Flexible and Lightweight Lithium-Ion Batteries Based on Cellulose Nanofibrils and Carbon Fibers.
- Authors
Huiran Lu; Hagberg, Johan; Lindbergh, Göran; Cornell, Ann
- Abstract
Flexible, low-weight electrodes with integrated current collectors based on chopped polyacrylonitrile carbon fibers (CF) were produced using an easy, aqueous fabrication process, where only 4 wt% of TEMPO-oxidized cellulose nanofibrils (CNF) were used as the binder. A flexible full cell was assembled based on a LiFePO4 (LFP) positive electrode with a CF current collector and a current collector-free CF negative electrode. The cell exhibited a stable specific capacity of 121 mAh g-1 based on the LFP weight. The CF in the negative electrode acted simultaneously as active material and current collector, which has a significant positive impact on energy density. Stable specific capacities of the CF/CNF negative electrode of 267 mAh g-1 at 0.1 C and 150 mAh g-1 at 1 C are demonstrated. The LFP/CNF with CF/CNF, as the current collector positive electrode (LFP-CF), exhibited a good rate performance with a capacity of ~150 mAh g-1 at 0.1 C and 133 mAh g-1 at 1 C. The polarization of the LFP-CF electrode was similar to that of a commercial Quallion LFP electrode, while much lower compared to a flexible LFP/CNF electrode with Al foil as the current collector. This is ascribed to good contact between the CF and the active material.
- Subjects
LITHIUM-ion batteries; CARBON fibers; CELLULOSE; POLARIZATION (Electricity); STORAGE batteries
- Publication
Batteries, 2018, Vol 4, Issue 2, p1
- ISSN
2313-0105
- Publication type
Article
- DOI
10.3390/batteries4020017