Lithium Difluorophosphate as a Dendrite-Suppressing Additive for Lithium Metal Batteries
Abstract
Here, the notorious lithium (Li) dendrites and the low Coulombic efficiency (CE) of Li anode are two major obstacles to the practical utilization of Li metal batteries (LMBs). Introducing a dendrite-suppressing additive into nonaqueous electrolytes is one of the facile and effective solutions to promote the commercialization of LMBs. Herein, Li difluorophosphate (LiPO2F2, LiDFP) is used as an electrolyte additive to inhibit Li dendrite growth by forming a vigorous and stable solid electrolyte interphase film on metallic Li anode. Moreover, the Li CE can be largely improved from 84.6% of the conventional LiPF6-based electrolyte to 95.2% by the addition of an optimal concentration of LiDFP at 0.15 M. The optimal LiDFP-containing electrolyte can allow the Li||Li symmetric cells to cycle stably for more than 500 and 200 h at 0.5 and 1.0 mA cm–2, respectively, much longer than the control electrolyte without LiDFP additive. Meanwhile, this LiDFP-containing electrolyte also plays an important role in enhancing the cycling stability of the Li||LiNi1/3Co1/3Mn1/3O2 cells with a moderately high mass loading of 9.7 mg cm–2. These results demonstrate that LiDFP has extensive application prospects as a dendrite-suppressing additive in advanced LMBs.
- Authors:
-
[1];
[3]
- Hefei Univ. of Technology, Anhui (China)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Chinese Academy of Sciences, Anhui (China)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Natural Science Foundation of China (NSFC)
- Contributing Org.:
- Hefei University of Technology, Pacific Northwest National Laboratory
- OSTI Identifier:
- 1457041
- Grant/Contract Number:
- AC02-05CH11231; 21676067; 51372060; 21606065; 51502300; 1708085QE98; 1608085QE88
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Applied Materials and Interfaces
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 26; Journal ID: ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; electrolyte additive; lithium dendrite suppression; lithium difluorophosphate; lithium metal battery; solid electrolyte interphase
Citation Formats
Shi, Pengcheng, Zhang, Linchao, Xiang, Hongfa, Liang, Xin, Sun, Yi, and Xu, Wu. Lithium Difluorophosphate as a Dendrite-Suppressing Additive for Lithium Metal Batteries. United States: N. p., 2018.
Web. doi:10.1021/acsami.8b05185.
Shi, Pengcheng, Zhang, Linchao, Xiang, Hongfa, Liang, Xin, Sun, Yi, & Xu, Wu. Lithium Difluorophosphate as a Dendrite-Suppressing Additive for Lithium Metal Batteries. United States. https://doi.org/10.1021/acsami.8b05185
Shi, Pengcheng, Zhang, Linchao, Xiang, Hongfa, Liang, Xin, Sun, Yi, and Xu, Wu. Wed .
"Lithium Difluorophosphate as a Dendrite-Suppressing Additive for Lithium Metal Batteries". United States. https://doi.org/10.1021/acsami.8b05185. https://www.osti.gov/servlets/purl/1457041.
@article{osti_1457041,
title = {Lithium Difluorophosphate as a Dendrite-Suppressing Additive for Lithium Metal Batteries},
author = {Shi, Pengcheng and Zhang, Linchao and Xiang, Hongfa and Liang, Xin and Sun, Yi and Xu, Wu},
abstractNote = {Here, the notorious lithium (Li) dendrites and the low Coulombic efficiency (CE) of Li anode are two major obstacles to the practical utilization of Li metal batteries (LMBs). Introducing a dendrite-suppressing additive into nonaqueous electrolytes is one of the facile and effective solutions to promote the commercialization of LMBs. Herein, Li difluorophosphate (LiPO2F2, LiDFP) is used as an electrolyte additive to inhibit Li dendrite growth by forming a vigorous and stable solid electrolyte interphase film on metallic Li anode. Moreover, the Li CE can be largely improved from 84.6% of the conventional LiPF6-based electrolyte to 95.2% by the addition of an optimal concentration of LiDFP at 0.15 M. The optimal LiDFP-containing electrolyte can allow the Li||Li symmetric cells to cycle stably for more than 500 and 200 h at 0.5 and 1.0 mA cm–2, respectively, much longer than the control electrolyte without LiDFP additive. Meanwhile, this LiDFP-containing electrolyte also plays an important role in enhancing the cycling stability of the Li||LiNi1/3Co1/3Mn1/3O2 cells with a moderately high mass loading of 9.7 mg cm–2. These results demonstrate that LiDFP has extensive application prospects as a dendrite-suppressing additive in advanced LMBs.},
doi = {10.1021/acsami.8b05185},
journal = {ACS Applied Materials and Interfaces},
number = 26,
volume = 10,
place = {United States},
year = {Wed Jun 13 00:00:00 EDT 2018},
month = {Wed Jun 13 00:00:00 EDT 2018}
}
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Figures / Tables:
Figure 1: Average CE values of Li metal in electrolytes with LiDFP additive from 0 to 0.15 M.
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