Surface modified CFx cathode material for ultrafast discharge and high energy density
Abstract
Li/CFx 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, CFx, 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 CFx. The modified CFx, 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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1182493
- Report Number(s):
- BNL-107378-2015-JA
Journal ID: ISSN 2050-7488; JMCAET; R&D Project: MA015MACA; KC0201010
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Materials Chemistry. A
- Additional Journal Information:
- Journal Volume: 2; Journal Issue: 48; Journal ID: ISSN 2050-7488
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; primary lithium batteries; carbon fluoride; de-fluorination; ultrafast discharge
Citation Formats
Dai, Yang, Zhu, Yimei, Cai, Sendan, Wu, Lijun, Yang, Weijing, Xie, Jingying, Wen, Wen, Zheng, Jin-Cheng, and Zheng, Yi. Surface modified CFx cathode material for ultrafast discharge and high energy density. United States: N. p., 2014.
Web. doi:10.1039/c4ta05492j.
Dai, Yang, Zhu, Yimei, Cai, Sendan, Wu, Lijun, Yang, Weijing, Xie, Jingying, Wen, Wen, Zheng, Jin-Cheng, & Zheng, Yi. Surface modified CFx cathode material for ultrafast discharge and high energy density. United States. https://doi.org/10.1039/c4ta05492j
Dai, Yang, Zhu, Yimei, Cai, Sendan, Wu, Lijun, Yang, Weijing, Xie, Jingying, Wen, Wen, Zheng, Jin-Cheng, and Zheng, Yi. Mon .
"Surface modified CFx cathode material for ultrafast discharge and high energy density". United States. https://doi.org/10.1039/c4ta05492j. https://www.osti.gov/servlets/purl/1182493.
@article{osti_1182493,
title = {Surface modified CFx cathode material for ultrafast discharge and high energy density},
author = {Dai, Yang and Zhu, Yimei and Cai, Sendan and Wu, Lijun and Yang, Weijing and Xie, Jingying and Wen, Wen and Zheng, Jin-Cheng and Zheng, Yi},
abstractNote = {Li/CFx 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, CFx, 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 CFx. The modified CFx, 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.},
doi = {10.1039/c4ta05492j},
journal = {Journal of Materials Chemistry. A},
number = 48,
volume = 2,
place = {United States},
year = {Mon Nov 10 00:00:00 EST 2014},
month = {Mon Nov 10 00:00:00 EST 2014}
}
Web of Science
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