Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 623, Issue -, Pages 532-540Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.05.055
Keywords
Hollow Co-3[Co(CN)(6)](2); Film; Dendrite-free; Lithium metal anode
Categories
Funding
- Zhejiang Provincial Natural Science Foundation of China [LQ20B010002]
- Open Research Fund of Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Zhejiang Normal University [KLMEACM202002]
Ask authors/readers for more resources
In this study, a new three-dimensional lithiophilic current collector was designed, consisting of hollow CoCoPBA nanoparticles embedded in a high-conductivity carbon film. This current collector effectively promotes electron transfer, reduces local current density, and provides abundant active sites, which contribute to a more uniform lithium deposition and an extended cycle life of lithium metal anodes.
Lithium metal is considered to be an ideal anode material due to its ultra-high theoretical capacity and extremely low electric potential. Unfortunately, the infinite volume expansion and unregulated formation of lithium dendrites in the plating/stripping process restrict its practical utilization. Herein, we designed a hollow Co-3[Co(CN)(6)](2) (CoCoPBA) embedded high-conductivity carbon film as a three-dimensional (3D) lithiophilic current collector (h-CoCoPBAs@SWCNT). The interwoven carbon nanotubes with hollow nanoparticles can effectively promote electron transfer and reduce local current density, adapting to the huge volume expansion in long-term electrochemical cycling. At the same time, lithiophilic hollow CoCoPBA nanoparticles provide abundant active sites due to their large surface area, efficiently reducing nucleation overpotential and making lithium deposition easier and more uniform, both confirmed by theoretical calculation and experiment. Accordingly, compared with bare Cu electrodes, h-CoCoPBAs@SWCNT electrodes have a flat and uniform Li deposition morphology, which is beneficial to enhance the cycle life of lithium metal anodes. And the symmetrical cell assembled by hCoCoPBAs@SWCNT shows stable cycling performance of more than 500 h at 2 mA cm(-2) with 1 mAh cm(-2). Besides, the assembled lithium-sulfur full cell also has higher cycle stability and rate performance. (c) 2022 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available