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Title: Achieving High Energy Density through Increasing the Output Voltage: A Highly Reversible 5.3 V Battery

Abstract

The energy density of current Li-ion batteries is limited by the low capacity of intercalation cathode, which leaves relatively little room to further improve because the specific capacities of these cathodes approach the theoretical levels. Increasing the cell output voltage is a possible direction to largely increase the energy density of the batteries. Extensive research has been devoted to exploring >5.0 V cells, but only limited advances have been achieved because of the narrow electrochemical stability window of the electrolytes (<5.0 V). Herein, we report a 5.5 V electrolyte (1 M LiPF 6 in fluoroethylene carbonate, bis(2,2,2-trifluoroethyl) carbonate, and hydrofluoroether [FEC/FDEC/HFE] with a Li difluoro(oxalate)borate [LiDFOB] additive) that enables 5.3 V LiCoMnO 4 cathodes to provide an energy density of 720 Wh kg -1 for 1,000 cycles and 5.2 V graphite||LiCoMnO 4 full cells to provide an energy density of 480 Wh kg -1 for 100 cycles. Lastly, the 5.5 V electrolytes provide a large step toward developing high-energy Li batteries.

Authors:
 [1];  [1]; ORCiD logo [2];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [1]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1501611
Report Number(s):
BNL-211370-2019-JAAM
Journal ID: ISSN 2451-9294
Grant/Contract Number:  
SC0012704; EE0008200; EE0008202
Resource Type:
Accepted Manuscript
Journal Name:
Chem
Additional Journal Information:
Journal Name: Chem; Journal ID: ISSN 2451-9294
Publisher:
Cell Press, Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; high voltage; Li-metal battery; Li-ion battery; high energy density; Li-metal anode; stable electrolyte

Citation Formats

Chen, Long, Fan, Xiulin, Hu, Enyuan, Ji, Xiao, Chen, Ji, Hou, Singyuk, Deng, Tao, Li, Jing, Su, Dong, Yang, Xiaoqing, and Wang, Chunsheng. Achieving High Energy Density through Increasing the Output Voltage: A Highly Reversible 5.3 V Battery. United States: N. p., 2019. Web. doi:10.1016/j.chempr.2019.02.003.
Chen, Long, Fan, Xiulin, Hu, Enyuan, Ji, Xiao, Chen, Ji, Hou, Singyuk, Deng, Tao, Li, Jing, Su, Dong, Yang, Xiaoqing, & Wang, Chunsheng. Achieving High Energy Density through Increasing the Output Voltage: A Highly Reversible 5.3 V Battery. United States. doi:10.1016/j.chempr.2019.02.003.
Chen, Long, Fan, Xiulin, Hu, Enyuan, Ji, Xiao, Chen, Ji, Hou, Singyuk, Deng, Tao, Li, Jing, Su, Dong, Yang, Xiaoqing, and Wang, Chunsheng. Thu . "Achieving High Energy Density through Increasing the Output Voltage: A Highly Reversible 5.3 V Battery". United States. doi:10.1016/j.chempr.2019.02.003.
@article{osti_1501611,
title = {Achieving High Energy Density through Increasing the Output Voltage: A Highly Reversible 5.3 V Battery},
author = {Chen, Long and Fan, Xiulin and Hu, Enyuan and Ji, Xiao and Chen, Ji and Hou, Singyuk and Deng, Tao and Li, Jing and Su, Dong and Yang, Xiaoqing and Wang, Chunsheng},
abstractNote = {The energy density of current Li-ion batteries is limited by the low capacity of intercalation cathode, which leaves relatively little room to further improve because the specific capacities of these cathodes approach the theoretical levels. Increasing the cell output voltage is a possible direction to largely increase the energy density of the batteries. Extensive research has been devoted to exploring >5.0 V cells, but only limited advances have been achieved because of the narrow electrochemical stability window of the electrolytes (<5.0 V). Herein, we report a 5.5 V electrolyte (1 M LiPF6 in fluoroethylene carbonate, bis(2,2,2-trifluoroethyl) carbonate, and hydrofluoroether [FEC/FDEC/HFE] with a Li difluoro(oxalate)borate [LiDFOB] additive) that enables 5.3 V LiCoMnO4 cathodes to provide an energy density of 720 Wh kg-1 for 1,000 cycles and 5.2 V graphite||LiCoMnO4 full cells to provide an energy density of 480 Wh kg-1 for 100 cycles. Lastly, the 5.5 V electrolytes provide a large step toward developing high-energy Li batteries.},
doi = {10.1016/j.chempr.2019.02.003},
journal = {Chem},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 28, 2020
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