Surface Modified Pinecone Shaped Hierarchical Structure Fluorinated Mesocarbon Microbeads for Ultrafast Discharge and Improved Electrochemical Performances
- Shanghai Univ., Shanghai (China). School of Environmental and Chemical, Engineering, Dept. of Chemical Engineering
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
- Shanghai Univ., Shanghai (China). School of Environmental and Chemical, Engineering, Dept. of Mechanical Engineering; Univ. of California, Berkeley, CA (United States). Dept. of Mechanical Engineering
- Xiamen Univ. Malaysia, Xiamen (China). Fujian Provincial Key Lab. of Theoretical and Computational Chemistry, Dept. of Physics; Xiamen Univ. Malaysia, Selangor (Malaysia)
- Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
Among all primary lithium batteries, Li/CFx primary battery possesses the highest energy density of 2180 Wh kg-1. However, a key limitation is its poor rate capability because the cathode material CFx is intrinsically a poor electronic conductor. Here, we developed a so-called “doing subtraction” method to modify the pinecone shaped fluorinated mesocarbon microbead (F-MCMB). The modified fluorinated mesocarbon microbead (MF-MCMB), manifests the advantage of open-framed structure, possesses good electronic conductivity and removes transport barrier for lithium ions. Thus, high capacity performance and excellent rate capability without compromising capacity can be obtained. A capacity of 343 mAhg-1 and a maximum power density of 54600 W kg-1 are realized at an ultrafast rate of 40 C (28A g-1). Additionally, the MF-MCMB cathode does not show any voltage delay even at 5C during the discharge, which is a remarkable improvement over the state-of-the-art CFxmaterials.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; SC0012673
- OSTI ID:
- 1336173
- Report Number(s):
- BNL-113163-2016-JA; R&D Project: MA509MACA; KC0201010
- Journal Information:
- Journal of the Electrochemical Society, Vol. 164, Issue 2; ISSN 0013-4651
- Publisher:
- The Electrochemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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