All-solid-state flexible zinc-air battery with polyacrylamide alkaline gel electrolyte

JOURNAL OF POWER SOURCES

卷:450

Article

Miao, He^1,2  Chen, Bin¹  Li, Shihua³  Wu, Xuyang¹  Wang, Qin¹  Zhang, Chunfei¹  Sun, Zixu²  Li, Hong² 

[1] Ningbo Univ, Fac Maritime & Transportat, Ningbo 315211, Peoples R China

[2] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Graphene Technol & Applicat Zhejiang Prov, Hangzhou 315201, Zhejiang, Peoples R China

关键词: Zinc-air battery;    All-solid-state;    PAM-Based AGE;    Oxygen catalysts;    MnO2 nanowires;   

DOI  :  10.1016/j.jpowsour.2019.227653

来源: Elsevier

【 摘 要 】

The rapid development of flexible electronic devices prompts the extensive attentions of the all-solid-state flexible zinc-air batteries (ZABs). Nevertheless, the low energy conversion efficiency and output power density hinder the practical application of all-solid-state flexible ZABs due to the lacks of bifunctional oxygen catalysts with high catalytic activity and flexible solid electrolytes with high ionic conductivity. Herein, we report an active and cost-effective oxygen catalyst of manganese dioxide (MnO2) nanowires supported on nitrogen-doped reduced graphene oxide (MnO2/NRGO.(Urea)) synthesized by a facile one-pot process. Along with superior stability, MnO2/NRGO-(Urea) shows the prominent activities for oxygen reduction and evolution reactions (ORR and OER), and lowest potential difference between ORR and OER among most of the manganese dioxides reported recently. Importantly, the polyacrylamide (PAM) based alkaline gel electrolyte (AGE) which shows much higher hydroxide-ion conductivity (215.6 mS cm(-2)) than the state-of-the-art polyvinyl alcohol (PVA)-based AGEs is employed in the all-solid-state flexible ZAB. Thanks to the MnO2/NRGO.(Urea) catalyst and PAM-based AGE, the maximum power density (P-max) of the as -fabricated all-solid-state flexible ZAB reaches 105.0 mW cm(-2) with extraordinary mechanical flexibility and robustness. Our work offers a cost-effective strategy for all-solid-state flexible ZABs with high power density and excellent energy conversion efficiency.

【 授权许可】

Free