Table 2 Correlation between electrolyte solutions and cell properties

From: Ultra-lightweight rechargeable battery with enhanced gravimetric energy densities >750 Wh kg−1 in lithium–sulfur pouch cell

Electrolyte Solution (chg./dischg. cycle number at 0.1C-rate and 30 °C)

Normalized Capacity after 20 cycles

Normalized Resistance after 20 cycles

Ele-1 (20)

1.00

1.02

Ele-2 (20)

1.00

1.01

Ele-3 (20)

1.00

1.00

Ele-4 (20)

0.98

1.05

Ele-5 (20)

0.89

1.10

Ele-6 (20) *Ele-6 = Light-Ele

0.95

1.07

Ele-1 (5) → Ele-6 (20)

[two-step method]

0.97

1.05

Ele-2 (5) → Ele-6 (20)

[two-step method]

0.99

1.02

Ele-3 (5) → Ele-6 (20)

[two-step method]

1.00

1.00

Ele-3 (5) → Ele-4 (20)

[two-step method]

1.00

1.02

Ele-3 (5) → Ele-5 (20)

[two-step method]

0.98

1.03

  1. Ele-1: 1.0 M LiPF6 in EC/DEC (50/50, vol%).
  2. Ele-2: 1.0 M LiPF6 in FEC/DEC (50/50, vol%).
  3. Ele-3: 1.0 M LiPF6 in FEC/DEC (50/50, vol%) + 2 wt% LiBOB.
  4. Ele-4: 1.0 M LiTFSI in DOL/DME (50/50, vol%) + 2 wt% LiNO3.
  5. Ele-5: 0.4 M LiTFSI + 0.4 M LiNO3 + 0.1 M LiHFDF in DME/DOL/TFMTMS (48/17/35, vol%).
  6. Ele-6: 0.2 M LiTFSI + 0.2 M LiFSI + 0.1 M LiNO3 + 0.1 M LiHFDF in DME/DOL/TFMTMS (75/5/20, vol%).