TY  - JOUR
A1  - Wang, Ningzhen
A1  - Daniels, Robert
A1  - Connelly, Liam
A1  - Sotzing, Michael
A1  - Wu, Chao
A1  - Gerhard, Reimund
A1  - Sotzing, Gregory A.
A1  - Cao, Yang
T1  - All-organic flexible ferroelectret nanogenerator with fabric-based electrodes for self-powered body area networks
JF  - Small : nano micro
N2  - Due to their electrically polarized air-filled internal pores, optimized ferroelectrets exhibit a remarkable piezoelectric response, making them suitable for energy harvesting. Expanded polytetrafluoroethylene (ePTFE) ferroelectret films are laminated with two fluorinated-ethylene-propylene (FEP) copolymer films and internally polarized by corona discharge. Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)-coated spandex fabric is employed for the electrodes to assemble an all-organic ferroelectret nanogenerator (FENG). The outer electret-plus-electrode double layers form active device layers with deformable electric dipoles that strongly contribute to the overall piezoelectric response in the proposed concept of wearable nanogenerators. Thus, the FENG with spandex electrodes generates a short-circuit current which is twice as high as that with aluminum electrodes. The stacking sequence spandex/FEP/ePTFE/FEP/ePTFE/FEP/spandex with an average pore size of 3 mu m in the ePTFE films yields the best overall performance, which is also demonstrated by the displacement-versus-electric-field loop results. The all-organic FENGs are stable up to 90 degrees C and still perform well 9 months after being polarized. An optimized FENG makes three light emitting diodes (LEDs) blink twice with the energy generated during a single footstep. The new all-organic FENG can thus continuously power wearable electronic devices and is easily integrated, for example, with clothing, other textiles, or shoe insoles.
KW  - all-organic ferroelectret nanogenerator (FENG)
KW  - all-organic
KW  - piezoelectric nanogenerator (PENG)
KW  - expanded polytetrafluoroethylene
KW  - ferroelectret
KW  - micro-energy harvesting
KW  - (PEDOT
KW  - PSS)-coated porous
KW  - fabric electrodes
KW  - wearable electronics
Y1  - 2021
U6  - https://doi.org/10.1002/smll.202103161
SN  - 1613-6810
SN  - 1613-6829
VL  - 17
IS  - 33
PB  - Wiley-VCH
CY  - Weinheim
ER  -