水凝胶电解质的协同化学和界面工程增强固态锌空气电池的耐久性( 二 )





图6
测量的a)开路图 , b)放电极化曲线和相应的功率密度图 , c)不同电流密度下的放电曲线 , 以及d)分别基于PAA-Fe3+/NH4Cl和PAA-Fe3+-的FSZAB的恒电流放电曲线CS/NH4Cl HEs;e)电流密度为5 mA cm-2时的恒电流放电-充电测试(插图照亮了同期的弯曲-恢复变形循环测试);基于f) PAA-Fe3+/NH4Cl HE和g)PAA-Fe3+-CS/NH4Cl HE的FSZABs在不同弯曲恢复变形循环后的EIS光谱;总结相应的h)电荷转移电阻和i)不同弯曲恢复变形循环后样品的等效串联电阻 。
表1.该工作与目前报道的最先进的柔性固态锌空气电池的性能比较

Catalyst
Electrode structure
Electrolyte
Open circuit voltage
Specific capacity
Power density
Durability
Flexibility   evaluation
Ref.
YSSHs-NSC-Co9S8
Sandwich
Neutral PAA-Fe3+-CS/NH4Cl HE
1.45 V
719 mAh g?1
55.4 mW cm?2
120 h 5 mA cm?2
Allowing repeated  bending-recovery deformation up to 360 cycles with voltaic efficiency  slightly decreased from 32.8% to 31.6%
This work
Co/CNWs/CNFs
Sandwich
Alkaline PAA with KOH
1.55 V
N.A.
176 mW cm?2
40 h 1 mA cm?2
Charge/discharge curves  remained unchanged at bending angles of 90° and 180°

Co3O4-xHoNPs@HPNCS-60
Sandwich
Alkaline PVA with 6 m KOH and 0.02 m  Zn(Ac)2
1.459 V
779.36 mAh g?1
94.1 mW cm?2
16.6 h 3mA cm?2
N.A.

1 nm-CoOx/N-RGO
Sandwich
Alkaline PVA with KOH and  Zn(Ac)2
1.39 V
N.A.
120 mW cm?2(300 W g?1)
10 h 6 mA cm?2
Open-circuit voltage and  charge/discharge curves remained almost unchanged between the bending (180°)  and non-bending conditions

Co-NCNT
Sandwich
Alkaline PANa with 6 m KOH and 0.2 m Zn(Ac)
1.45 V
N.A.
144.6 mW cm?2
32 h 5 mA cm?2
Charge–discharge performances  is stable after hundreds of bending-recovery deformation (bent to 90°)

Commercial Co3O4
Sandwich
Alkaline Porous PVA-5 wt% SiO2
N.A.
720.6 mAh g?1
62.6 mW cm?3
48 h 3 mA cm?3
GCD performance galvanostatic  discharge and rate performance almost remained unchanged at bending angles  of 60° and 180°

Co3O4
Sandwich
Alkaline 2-QAFC with 1 m KOH
1.3 V
492 mAh g?1
23.62 mW cm?2(2362 mW g?1)
35 h 250 mA g?1
Power density almost remained  unchanged at bending angles of 60° 90° and 120°

Co3O4/N-rGO
Fiber
Alkaline PVA with 0.15 m KOH
1.31 V
550 mAh g?1
0.908 mW cm?2(36.1 mWh cm?3)
25 h 3 mA cm?2
Charge/discharge curves almost  remained unchanged in different shapes (bending recovering and knotting)

Co4N/CNW/CC
Cable
Alkaline PVA with KOH
1.346 V
N.A.
N.A.
12 h 0.5 mA cm?2
Discharge voltage maintained at  different bending angles of 30° 60° 90° and 120°

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