Table 2.

Performance of wearable energy storage devices

Classification	Active material	Performance	Ref.
Lithium‐ion battery (LIB)	Ni–Sn and LiCoO2	Cell capacity: 1 mA h cm−1; Output voltage: 3.5 V	117
	CNT/silicon//CNT/LiMn2O4	Specific capacity: 106.5 mA h g−1; Voltage output: 3.4 V; Linear energy density: 0.75 mW h cm−1; Areal energy density: 4.5 mW h cm−2	118
	CNT/Li4Ti5O12//CNT/LiMn2O4	Energy density: 17.7 mW h cm−3; Power density: 0.56 W cm−3; Capacity retention: 97% after 1000 bending cycles, 84% after 200 stretching cycles	108
	Li4Ti5O12//LiFePO4	Specific capacity: ≈98 mA h g−1; Capacity retention: 91.8% after 40 cycles equivalent to 5500 deep folding–unfolding cycles	119
	Li4Ti5O12//LiCoO2	Maintains capacity density: ≈1.1 mA h cm−2; Output voltage: 2.5 V; reversible stretchability: 300%	51
	MWCNT/Li4Ti5O12//MWCNT/LiMn2O4	Specific capacity: 91.3 mA h g−1; capacity retention: 88% after 600% stretching	120
	CNT/Li4Ti5O12//CNT/LiMn2O4	Specific capacity: 92.4 mA h g−1; capacity retention: 92.1% after 100 cycles, 99% after 300 stretching cycles	121
	CNT/LiFePO4//CNT/Li4Ti5O12	Specific capacity: 110 mA h g−1	122
Yarn supercapacitor	CNT@PANI	Areal capacitance: 38 mF cm−2 at 0.01 mA cm−2; maintaining almost full capacitance after 150 bending cycles	157
	IR‐CNT@PEDOT/PSS	Specific capacitance: 18.5 F g−1 at 0.1 A g−1; Retained 98.8% of capacitance after 200 bending cycles	152
	CNT/MnO2	Specific capacitance: 12.5 F g−1 at 0.14 A g−1; retained 99.5% capacitance after 200 bending cycles. 42.0 W h kg−1 at a lower power density of 483.7 W kg−1, and 28.02 W h kg−1 at a higher power density of 19.250 kW kg−1	149
	Pt/CNT/PANI	Specific capacitance: 86.2 F g−1 at 5 mV s−1; energy density of 35.27 W h Kg−1 and power density of 10.69 kW Kg−1 at 100 mV s−1	136
	1. PtCu + CNT	1. Specific capacitance: 148 F g−1 at 10 mV s−1	156
	2. Cu + CNT	2. Specific capacitance: 156 F g−1 at 10 mV s−1; 97.5% capacitance retention after 1000 fold/unfold cycles
Fiber/cable supercapacitor	Graphene fibers@3D‐G	Areal capacitance: 1.2‐1.7 mF cm−2; energy density: 0.4–1.7 × 10−7 W h cm−2; power density: 6–100 × 10−6 W cm−2	147
	MnO2 on ZnO nanowires	Areal capacitance: 2.4 mF cm−2 at 100 mV s−1; energy density of 2.7 × 10−8 Wh cm−2 and power density of 1.4 × 10−5 W cm−2	143
	Commercial pen ink	Areal capacitance: 11.9–19.5 mF cm−2; energy density: 1.76 × 10−6–2.7 × 10−6 W h cm−2 and a power density: 9.07 mW cm−2	144
	CuO@AuPd@MnO2 core–shell NWs	Specific capacitance: 1376 F g−1 at 5 mV s−1; 99% capacitance retention after 5000 cycles; 93.4% capacitance retention after 100 bending cycles. Power density: 0.55 mW h cm−3 and energy density: 413 mW cm−3	166
	β‐Ni(OH)2//AC	Specific capacitance: 481 F g−1 at 5 mV s−1; ASC device: 43.5 F g−1 at 5 mV s−1; 76% capacitance retention after 2000 cycles; energy density of 10.7 mW h cm−1 at a power density of 169 mW cm−1	171
	NiO NSs@CNTs@CuO NWAs/Cu//AC@CF	Specific capacitance: 93.42 F g−1; 83.6% capacitance retention after 2000 cycles; energy density of 26.32 W h Kg−1 at power density of 1218.33 W Kg−1	172
	PPy–MnO2–CNT	Areal capacitance: 1.49 F cm−2 at 1 mV s−1; 87% capacitance retention after 2000 cycles; High areal energy density of 33 µW h cm−2 at 0.67 mW cm−2 and a high areal power density of 13 mW cm−2 at 14.7 µW h cm−2	128
	Fe2O3@carbon//MnO2@CuO	Volumetric capacitance: 2.46 F cm−3 at 0.13 A cm−3; Good rate capability (95.4%); 98.5% capacitance retention after 200 bending cycles; Energy density of 0.85 mW h cm−3 at power density of 0.10 W cm−3	176
Screen printed supercapacitor	AC (YP17)	Specific capacitance: 85 F g−1 at ≈0.25 A g−1 in polyester microfiber and cotton lawn; 0.43 mF cm−2 at 5 mA cm−2 for both fabrics; 92% capacitance retention after 10 000 cycles	185
	AC (YP17)	Areal capacitance: 0.51 F cm−2 at mV s−1 and 88 F g−1 at 10 mV s −1 for knitted CF; 80% capacitance retained after 200 cycles	130
	FeOOH/MnO2	Specific capacitance: 350.2 F g−1 at 0.5 A g−1; Good rate capability: 159.5 F g−1 at 20 A g−1; 95.6% capacitance retention after 10000 cycles	186