Energy harvesting "3-D knitted spacer" based piezoelectric textiles

S. Anand, Navneet Soin, T. H. Shah, E. Siores

Research output: Contribution to journalConference articlepeer-review

12 Citations (Scopus)
78 Downloads (Pure)


The piezoelectric effect in Poly(vinylidene fluoride), PVDF, was discovered over four decades ago and since then, significant work has been carried out aiming at the production of high p-phase fibres and their integration into fabric structures for energy harvesting. However, little work has been done in the area of production of "true piezoelectric fabric structures" based on flexible polymeric materials such as PVDF. In this work, we demonstrate "3-D knitted spacer" technology based all-fibre piezoelectric fabrics as power generators and energy harvesters. The knitted single-structure piezoelectric generator consists of high p-phase (∼80%) piezoelectric PVDF monofilaments as the spacer yarn interconnected between silver (Ag) coated polyamide multifilament yarn layers acting as the top and bottom electrodes. The novel and unique textile structure provides an output power density in the range of 1.105.10 gWcm-2 at applied impact pressures in the range of 0.02-0.10 MPa, thus providing significantly higher power outputs and efficiencies over the existing 2-D woven and nonwoven piezoelectric structures. The high energy efficiency, mechanical durability and comfort of the soft, flexible and all-fibre based power generator is highly attractive for a variety of potential applications such as wearable electronic systems and energy harvesters charged from ambient environment or by human movement.

Original languageEnglish
Article number012001
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished (in print/issue) - 9 Aug 2016
Event48th Conference of the International Federation of Knitting Technologists, IFKT 2016 - Moenchengladbach and Cologne, Germany
Duration: 8 Jun 201611 Jun 2016


  • Energy harvesting
  • Piezoelectric effect
  • Poly(vinylidene fluoride) PVDF
  • β phase


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