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

Dai, Yang; Fang, Yuan; Cai, Sendan; Wu, Lijun; Yang, Weijing; Yan, Hao; Xie, Jingying; Zheng, Jin-Cheng; Takeuchi, Esther; Zhu, Yimei

doi:10.1149/2.0451614jes

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

Journal Article · Thu Dec 01 00:00:00 EST 2016 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/2.0451614jes· OSTI ID:1336173

Dai, Yang ^[1]; Fang, Yuan ^[1]; Cai, Sendan ^[1]; Wu, Lijun ^[2]; Yang, Weijing ^[1]; Yan, Hao ^[1]; Xie, Jingying ^[3]; Zheng, Jin-Cheng ^[4]; Takeuchi, Esther ^[5]; Zhu, Yimei ^[2]

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/CF_x 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 CF_x 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 CF_xmaterials.

View Accepted Manuscript (DOE)

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) (SC-22)

Grant/Contract Number:: SC0012673; SC0012704

OSTI ID:: 1336173

Report Number(s):: BNL--113163-2016-JA; KC0201010

Journal Information:: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 2 Vol. 164; ISSN 0013-4651

Publisher:: The Electrochemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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High-Power-Density, High-Energy-Density Fluorinated Graphene for Primary Lithium Batteries Zhong, Guiming; Chen, Huixin; Huang, Xingkang Frontiers in Chemistry, Vol. 6 https://doi.org/10.3389/fchem.2018.00050	journal	March 2018
Enhanced cycle performance and lifetime estimation of lead-acid batteries Yang, Shaoqiang; Li, Ruhong; Cai, Xianyu New Journal of Chemistry, Vol. 42, Issue 11 https://doi.org/10.1039/c8nj00542g	journal	January 2018

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