Surface modified CFx cathode material for ultrafast discharge and high energy density

Dai, Yang; Zhu, Yimei; Cai, Sendan; Wu, Lijun; Yang, Weijing; Xie, Jingying; Wen, Wen; Zheng, Jin-Cheng; Zheng, Yi

doi:10.1039/c4ta05492j

Title: Surface modified CF_x cathode material for ultrafast discharge and high energy density

Journal Article · Mon Nov 10 00:00:00 EST 2014 · Journal of Materials Chemistry. A

DOI:https://doi.org/10.1039/c4ta05492j· OSTI ID:1182493

Dai, Yang ^[1]; Zhu, Yimei ^[2]; Cai, Sendan ^[1]; Wu, Lijun ^[2]; Yang, Weijing ^[1]; Xie, Jingying ^[3]; Wen, Wen ^[4]; Zheng, Jin-Cheng ^[5]; Zheng, Yi ^[1]

Shanghai Inst. of Space Power Sources, Shanghai (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Shanghai Inst. of Space Power Sources, Shanghai (China); Shanghai Engineering Center for Power and Energy Storage Systems, Shanghai (China)
BL14B1 Shanghai Synchrotron Radiation Facility, Shanghai (China)
Xiamen Univ., Xiamen (China)

Li/CF_x primary possesses the highest energy density of 2180 W h kg⁻¹ among all primary lithium batteries. However, a key limitation for the utility of this type of battery is in its poor rate capability because the cathode material, CF_x, is an intrinsically poor electronic conductor. Here, we report on our development of a controlled process of surface de-fluorination under mild hydrothermal conditions to modify the highly fluorinated CF_x. The modified CF_x, consisting of an in situ generated shell component of F-graphene layers, possesses good electronic conductivity and removes the transporting barrier for lithium ions, yielding a high-capacity performance and an excellent rate-capability. Indeed, a capacity of 500 mA h g⁻¹ and a maximum power density of 44 800 W kg⁻¹ can be realized at the ultrafast rate of 30 C (24 A g⁻¹), which is over one order of magnitude higher than that of the state-of-the-art primary lithium-ion batteries.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704

OSTI ID:: 1182493

Report Number(s):: BNL-107378-2015-JA; JMCAET; R&D Project: MA015MACA; KC0201010

Journal Information:: Journal of Materials Chemistry. A, Vol. 2, Issue 48; ISSN 2050-7488

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 56 works

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Fluorinated graphene/sulfur hybrid cathode for high energy and high power density lithium primary batteries Peng, Sikan; Yan, Shaojiu; Wang, Nan RSC Advances, Vol. 8, Issue 23 https://doi.org/10.1039/c8ra00226f	journal	January 2018
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Insights into the lithiation mechanism of CF _x by a joint high-resolution ¹⁹ F NMR, in situ TEM and ⁷ Li NMR approach Zhong, Guiming; Chen, Huixin; Cheng, Yong Journal of Materials Chemistry A, Vol. 7, Issue 34 https://doi.org/10.1039/c9ta06800g	journal	January 2019

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75 CONDENSED MATTER PHYSICS
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primary lithium batteries
carbon fluoride
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