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Title: Surface Modified Pinecone Shaped Hierarchical Structure Fluorinated Mesocarbon Microbeads for Ultrafast Discharge and Improved Electrochemical Performances

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0451614jes· OSTI ID:1336173
 [1];  [1];  [1];  [2];  [1];  [1];  [3];  [4];  [5];  [2]
  1. Shanghai Univ., Shanghai (China). School of Environmental and Chemical, Engineering, Dept. of Chemical Engineering
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  3. 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
  4. Xiamen Univ. Malaysia, Xiamen (China). Fujian Provincial Key Lab. of Theoretical and Computational Chemistry, Dept. of Physics; Xiamen Univ. Malaysia, Selangor (Malaysia)
  5. 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
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (2)

Enhanced cycle performance and lifetime estimation of lead-acid batteries journal January 2018
High-Power-Density, High-Energy-Density Fluorinated Graphene for Primary Lithium Batteries journal March 2018