Details

Autor(en) / Beteiligte

• Chen, Lin
• Zhou, Jingwen
• Wang, Yunhao
• Xiong, Yuecheng
• Zhang, Junxiang
• Qi, Guicai
• Cheng, Jianli
• Wang, Bin

Titel

Flexible, Stretchable, Water‐/Fire‐Proof Fiber‐Shaped Li‐CO2 Batteries with High Energy Density

Ist Teil von

• Advanced energy materials, 2023-01, Vol.13 (1), p.n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library

Beschreibungen/Notizen

• 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. A flexible, stretchable, water‐/fire‐proof fiber‐shaped Li‐CO2 battery is constructed through mechanical engineering‐inspired “spring”‐like device architecture. The highly‐active cathodes deliver high energy density, a high energy efficiency of over 88%, excellent rate capabilities, and long‐term cycle stability.