Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 6, Issue 7, Pages 8697-8703Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b01014
Keywords
Cellulose; Aqueous Zn-ion battery; Flexible
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Funding
- National Natural Science Foundation of China [21764001, 21364001]
- project of Jiangxi Province Advantageous Science and Technology Innovation Team [20153BCB24001]
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Solid-state flexible aqueous Zn-ion battery was fabricated with nanostructured polyaniline-cellulose papers as the cathode and Zn-grown graphite papers as the anode. The separator was a flexible gel electrolyte with high ionic conductivity, based on cellulose nanofibers. The Zn-ion battery exhibited energy density of 117.5 and 67.8 mW.h/g at power density of 0.16 and 3.34 W/g, respectively (estimated from total active mass of both cathode and anode). The energy density of the Zn-ion battery was much higher than that of asymmetric supercapacitors with aqueous electrolytes, while maintaining a comparable power density. Meanwhile, good cyclic stability was achieved with a high capacity retention of 84.7% after 1000 charge/discharge cycles at a current density of 4 A/g. More importantly, specific capacity changed little under mechanical bending, and there was only 9% loss after 1000 bending cycles. The solid-state flexible Zn-ion battery has great potential as an energy-storage device for flexible displays and wearable electronics.
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