Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 29, Pages 24573-24582Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b07756
Keywords
flexible devices; rechargeable batteries; carbon nanotube fibers; microscale electrodes; gel polymer electrolytes
Funding
- National Natural Science Foundation of China [51403211, 51472238, 51777200, 51721005]
- Innovative-Talent Program (Institute of Electrical Engineering, Chinese Academy of Sciences)
- Beijing Municipal Science and Technology Commission [Z171100000917007]
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Nowadays, linear-shaped batteries have received increasing attentions because the unique one-dimensional architecture offers an omni-directional flexibility. We developed a cable-type flexible rechargeable Zn microbattery based on a microscale MnO2@carbon nanotube fiberlike composite cathode and Zn wire anode. The Zn-MnO2 cable microbattery exhibits a large specific capacity, good rate performance, and cyclic stability. The capacity of Zn-MnO2 cable batteries are 322 and 290 mAh/g based on MnO2 with aqueous and gel polymer electrolyte, corresponding to the specific energy of 437 and 360 Wh/kg, respectively. Besides, the Zn-MnO2 cable battery shows excellent flexibility, which can be folded into arbitrary shapes without sacrificing electrochemical performance. Furthermore, we studied electrochemical properties of Zn-MnO2 cable microbatteries with different Zn salt electrolytes, such as Zn salt with small anions (ZnSO4 or ZnCl2, etc.) and Zn salt with bulky anions (Zn(CF3SO3)(2), etc.). With the merits of impressive electrochemical performance and flexibility, this first flexible rechargeable Zn-MnO2 cable-like battery presents a new approach to develop high-performance power sources for portable and wearable electronics.
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