Low molecular weight (MW) spandex (L-spandex) was utilized as a binder for LiFePO4 electrodes in Li-ion batteries. The systematic analyses showed that the incorporation of L-spandex that can take advantage of its functional groups in the hard domains involving hydrogen bonding result in improved cohesion among electrode components and enhanced adhesion between electrode film and current collector. When compared to its traditional high MW polyvinylidene difloride counterpart the L-spandex electrode forms a more stable solid permeable interface layer sustaining over a long-term cycling supplying a clue for its superior performances regarding rate capability and cyclability. Also the enhanced adhesion property of the L-spandex electrode turned out to be suitable for three-dimensional electrode structures that have been shown for flexible batteries targeted as power sources of future wearable IT devices.
- lithium iron phosphate
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)