Table 2.

LM-based wearable energy harvesting and storage devices

Energy harvesting/storage devices	Materials	Substrate	Stretchability/Wearability	Power output performance	References
TENGa	Galinstan	Geniomer fibers	∼560%, 50,000 cycles (compression and stretching)	490 V, 175 nC	(Dong et al., 2020)
TENG	EGaInb	Ecoflex matrix	∼500%/10,000 cycles (at strain of 100%)	∼1 mW cm−2	(Pan et al., 2020)
Battery	EGaIn	Ecoflex	∼100%	3.8 mA cm−2	(Liu et al., 2019a)
Supercapacitor	EGaIn, O-CNTc	PDMSe	∼50%/2000 cycles (at strain of 30%)	12.4 mF cm−2	(Kim et al., 2020e)
TEGd	EGaIn	Ecoflex	–	250–400 mV at Δ37°C	(Malakooti et al., 2019)
TEG	EGaIn	PDMS matrix	∼50%	59.96 mV at Δ10°C, 130 mV at Δ30°C, 278.6 mV, 86.6 μW/cm2 Δ60°C	(Zadan et al., 2020)
Wireless	Agf inks, EGaIn	Tattoo paper	–	300 mW in air, 100 mW with skin	(Alberto et al., 2020)

^aTENG – Triboelectric nanogenerator.

^bEGaIn – Eutectic gallium indium.

^cO-CNT – Oxidized carbon nanotube.

^dTEG – thermoelectric generator.

^ePDMS – Polydimethylsiloxane.

^fAg – Silver.