4 years ago

Flexible Li-CO2 Batteries with Liquid-Free Electrolyte

Flexible Li-CO2 Batteries with Liquid-Free Electrolyte
Zifan Li, Jun Chen, Xiaofei Hu
Developing flexible Li-CO2 batteries is a promising approach to reuse CO2 and simultaneously supply energy to wearable electronics. However, all reported Li-CO2 batteries use liquid electrolyte and lack robust electrolyte/electrodes structure, not providing the safety and flexibility required. Herein we demonstrate flexible liquid-free Li-CO2 batteries based on poly(methacrylate)/poly(ethylene glycol)-LiClO4-3 wt %SiO2 composite polymer electrolyte (CPE) and multiwall carbon nanotubes (CNTs) cathodes. The CPE (7.14×10−2 mS cm−1) incorporates with porous CNTs cathodes, displaying stable structure and small interface resistance. The batteries run for 100 cycles with controlled capacity of 1000 mAh g−1. Moreover, pouch-type flexible batteries exhibit large reversible capacity of 993.3 mAh, high energy density of 521 Wh kg−1, and long operation time of 220 h at different degrees of bending (0–360°) at 55 °C. Bendy batteries: A liquid-free rechargeable Li-CO2 battery with high performance and mechanical flexibility can be prepared by using a gel-like composite polymer electrolyte (CPE) and a multiwall carbon nanotube (CNTs) cathode. The resulting battery can be bent for use in flexible devices.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201701928

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