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- Title
Flexible, Stretchable, Water‐/Fire‐Proof Fiber‐Shaped Li‐CO<sub>2</sub> Batteries with High Energy Density.
- Authors
Chen, Lin; Zhou, Jingwen; Wang, Yunhao; Xiong, Yuecheng; Zhang, Junxiang; Qi, Guicai; Cheng, Jianli; Wang, Bin
- Abstract
Flexible fiber‐shaped Li‐CO2 batteries are regarded to be a potential candidate to power accessories for wearable electronics due to their high theoretical energy density and carbon‐neutral capability. However, the difficulties of electrode preparation and architecture design make it challenging for current Li‐CO2 batteries to keep a suitable balance between electrochemical performance and multifunctionality, one‐dimensional configuration and so forth. Herein, a flexible, stretchable, water‐/fire‐proof fiber‐shaped Li‐CO2 battery is constructed through an integrated electrode design strategy and a mechanical engineering‐inspired "spring"‐like device architecture. Impressively, the as‐prepared highly‐active Mo2N anchored N‐doped carbon nanotubes/carbon fiber hybrid bundle (CFB@NCNT‐Mo2N) cathode delivers a large full capacity of 5586.0 µAh cm−1, corresponding to a high energy density of 14 250 Wh kgcathode−1\[{\rm{Wh}}\,{\rm{kg}}_{{\rm{cathode}}}^{{\bm{ - }}1}\]. Meanwhile, it also demonstrates a low charge potential of ≈3.7 V, excellent rate capabilities, and outstanding long‐term cycling stability of 525 cycles. Furthermore, the constructed "spring"‐like fiber‐shaped Li‐CO2 battery device using CFB@NCNT‐Mo2N and a newly‐proposed gracile fibrous Li metal anode exhibits excellent adaptability to deformations including bending and stretching, as well as other favorable features like water‐/fire‐resistance. The successful demonstration of the proposed high‐performance and multifunctional Li‐CO2 batteries provide an effective model for designing future flexible energy storage devices beyond metal‐gas batteries for wearables in specific application scenarios.
- Subjects
ENERGY density; CARBON nanotubes; ARCHITECTURAL design; ENERGY storage; STORAGE batteries; WEARABLE technology
- Publication
Advanced Energy Materials, 2023, Vol 13, Issue 1, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202202933