Table 3 Summary of polymer electrolytes for Zn2+ transportation.

From: Pursuit of reversible Zn electrochemistry: a time-honored challenge towards low-cost and green energy storage

Electrolyte type

Matrix

Salt

Plasticizer

Ion conductivity at r.t. or 30 oC (mS/cm)

Transference number

Ref.

SPE

PEO

ZnCl2

NA

~3 × 10−6

NA

73

PEO

ZnBr2

~7 × 10−6

73

PEO

ZnI2

~7 × 10−6

73

PEOa

Zn(CH3COO)2

1.6 × 10−3

74

PEO b

Zn(CH3COO)2

1.2 × 10−4

0.17

75

PEO

Zn(CF3SO3)2

1.1 × 10−3

0.17

76

PEO/PVdF

Zn(CF3SO3)2

2.5 × 10−2

NA

86

Di-urea crosslinked PEO containing siloxance ormolytes

Zn(CF3SO3)2

3 × 10−3

78

PEO/PPG incorporated with Al2O3

Zn(CF3SO3)2

2.1 × 10−2

79

γ-irradiation crosslinked PEO incorporated with TiO2

ZnCl2

~1 × 10−1

80

PEO incorporated with Kevlar nanofibers

Zn(CF3SO3)2

2.5 × 10−2

83

PVdF-HFP incorporated with ZrO2

Zn(CF3SO3)2

4.6 × 10−1

81

PVdF-HFP incorporated with TiO2

Zn(CF3SO3)2

3.4 × 10−1

0.57

102

PVC/PEMA

Zn(CF3SO3)2

2.8 × 10−3

0.56

114

GPE

PEO/PVdF

Zn(CF3SO3)2

[EMIM][TFSI]

1.6 × 10−1

NA

86

PEO-poly(propylene oxide) - PEO

Li2SO4/ZnSO4

Water

6.3

84

PVdF-HFP

Zn(TFSI)2

[EMI][TFSI]/EC/PEGDME

4.7 × 10−1

85

PVdF-HFP

Zn(TFSI)2

[EMI][CF3SO3]

1.1

164

PVdF-HFP

Zn(CF3SO3)2

[EMI][CF3SO3]

1.3

164

PVdF-HFP incorporated with ZnO

Zn(CF3SO3)2

EC/PC

6.7

0.55

104

PVdF-HFP

Zn(CF3SO3)2

[EMI][CF3SO3]/NMP

7.1

NA

105

PVdF-HFP

Zn(CF3SO3)2

[EMI][CF3SO3]/NMP

3.8

0.30

105

PVC/PEMA

Zn(CF3SO3)2

[EMIM][TFSI]

1.1 × 10−1

0.63

113,114

PVC/PEMA incorporated with SiO2

Zn(CF3SO3)2

[EMIM][TFSI]

6.7 × 10−1

0.69

82

PAN-S

NA

Water

8.1 × 10−2

NA

120

  1. aElectrolyte prepared by solution casting method
  2. bElectrolyte prepared by hot-press casting method
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