Electrochemical Performance of Lithium Difluoro(Oxalate)Borate Synthesized by a Novel Method

Lithium difluoro(oxalate)borate (LiODFB) as an alternative salt for lithium-ion batteries, its application was limited by salt synthesis. In this study, high purity LiODFB was synthesized by simple and continuous technology using purified self-made BF3, the inert atmosphere and vacuum protection was avoided. Moreover, 0.7 mol L-1LiODFB-PC (propylene carbonate)/EMC (ethyl methyl carbonate)/DMC (dimethyl carbonate) (1:1:1, by volume) were prepared to assembling Li/MCMB (mesocarbon microbead) cell. Solid Electrolyte Interphase (SEI) was formed to stabilized MCMB structure even in one third (by volume) of PC in the electrolyte with the help of LiODFB. LiFePO4/Li cell was assembled as well. The cell based on LiODFB had excellent cycling performance and capacity retention.

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Study of decomposition products by gas chromatography-mass spectrometry and ion chromatography-electrospray ionization-mass spectrometry in thermally decomposed lithium hexafluorophosphate-based lithium ion battery electrolytes

RSC Advances ◽

10.1039/c5ra16679a ◽

2015 ◽

Vol 5 (98) ◽

pp. 80150-80157 ◽

Cited By ~ 50

Author(s):

Vadim Kraft ◽

Waldemar Weber ◽

Martin Grützke ◽

Martin Winter ◽

Sascha Nowak

Keyword(s):

Mass Spectrometry ◽

Lithium Ion Battery ◽

Ethylene Carbonate ◽

Lithium Ion ◽

Gas Chromatography Mass Spectrometry ◽

Ionization Mass ◽

Decomposition Products ◽

Ethyl Methyl ◽

Ethyl Methyl Carbonate ◽

Methyl Carbonate

In this work, the thermal decomposition of a lithium ion battery electrolyte (1 M LiPF6 in ethylene carbonate/ethyl methyl carbonate, 50/50 wt%) with a focus on the formation of organophosphates was systematically studied.

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Bridging role of ethyl methyl carbonate in fluorinated electrolyte on ionic transport and phase stability for lithium-ion batteries

Journal of Power Sources ◽

10.1016/j.jpowsour.2021.229760 ◽

2021 ◽

Vol 494 ◽

pp. 229760

Author(s):

Hailemariam Kassa Bezabh ◽

Shuo-Feng Chiu ◽

Teklay Mezgebe Hagos ◽

Meng-Che Tsai ◽

Yosef Nikodimos ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Phase Stability ◽

Lithium Ion ◽

Ionic Transport ◽

Ethyl Methyl ◽

Ethyl Methyl Carbonate ◽

Methyl Carbonate ◽

Fluorinated Electrolyte

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Compatibilities between Lithium Bis(Oxalate)Borate-Based Electrolyte and LiFePO4, LiMn2O4 or LiNi0.5Mn1.5O4 Cathodes for Lithium-Ion Batteries

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.953-954.1022 ◽

2014 ◽

Vol 953-954 ◽

pp. 1022-1025 ◽

Cited By ~ 1

Author(s):

Shi You Li ◽

Jin Liang Liu ◽

Xiao Ling Cui ◽

Li Ping Mao

Keyword(s):

Lithium Ion Batteries ◽

Electric Vehicles ◽

Ethylene Carbonate ◽

Lithium Ion ◽

Cycle Performance ◽

Electrochemical Performances ◽

Rate Performance ◽

Ethyl Methyl ◽

Ethyl Methyl Carbonate ◽

Methyl Carbonate

Olivine-type LiFePO4 and crystal structure LiMn2O4 or LiNi0.5Mn1.5O4 are promising cathode materials for electric vehicles (EVs) applications. To find more appropriate electrolyte systems to exert the perfect electrochemical performance of LiFePO4, LiMn2O4 and LiNi0.5Mn1.5O4 cathodes, the electrochemical performances of LiBOB-ethylene carbonate (EC)/ethyl methyl carbonate (EMC)/diethyl carbonate (DEC) electrolyte are investigated in this paper. In LiFePO4/Li, LiMn2O4/Li and LiNi0.5Mn1.5O4/Li cells, this novel electrolyte exhibits several advantages, such as stable cycle performance and good rate performance. It suggests that LiBOB-EC/EMC/DEC electrolyte has good compatibility with the three kinds of cathodes, and would be an attractive electrolyte for lithium-ion batteries based upon LiFePO4, LiMn2O4 and LiNi0.5Mn1.5O4 cathodes.

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A comparison of the solvation structure and dynamics of the lithium ion in linear organic carbonates with different alkyl chain lengths

Physical Chemistry Chemical Physics ◽

10.1039/c7cp05096h ◽

2017 ◽

Vol 19 (36) ◽

pp. 25140-25150 ◽

Cited By ~ 21

Author(s):

K. D. Fulfer ◽

D. G. Kuroda

Keyword(s):

Dimethyl Carbonate ◽

Alkyl Chain ◽

Lithium Ion ◽

Diethyl Carbonate ◽

Structure And Dynamics ◽

Ethyl Methyl ◽

Ethyl Methyl Carbonate ◽

Methyl Carbonate ◽

Chain Lengths ◽

Lithium Hexafluorophosphate

The structure and dynamics of electrolytes composed of lithium hexafluorophosphate (LiPF6) in dimethyl carbonate, ethyl methyl carbonate, and diethyl carbonate were investigated using a combination of linear and two-dimensional infrared spectroscopies.

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Selective Synthesis of Ethyl Methyl Carbonate via Catalytic Reactive Distillation over Heterogeneous MgO/HZSM‐5

ChemistrySelect ◽

10.1002/slct.201901167 ◽

2019 ◽

Vol 4 (24) ◽

pp. 7366-7370

Author(s):

Jianhua Lv ◽

Huanhuan Cai ◽

Yong Guo ◽

Wenrui Liu ◽

Ning Tao ◽

...

Keyword(s):

Reactive Distillation ◽

Selective Synthesis ◽

Ethyl Methyl ◽

Ethyl Methyl Carbonate ◽

Methyl Carbonate

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Waterborne polyurethane as a carbon coating for micrometre-sized silicon-based lithium-ion battery anode material

Royal Society Open Science ◽

10.1098/rsos.180311 ◽

2018 ◽

Vol 5 (8) ◽

pp. 180311 ◽

Cited By ~ 1

Author(s):

Chunfeng Yan ◽

Tao Huang ◽

Xiangzhen Zheng ◽

Cuiran Gong ◽

Maoxiang Wu

Keyword(s):

Carbon Coating ◽

Lithium Ion ◽

Waterborne Polyurethane ◽

Cycling Performance ◽

Capacity Retention ◽

Lithium Ions ◽

Rate Capacity ◽

Silicon Based ◽

Carbon Network ◽

A Current

Waterborne polyurethane (WPU) is first used as a carbon-coating source for micrometre-sized silicon. The remaining nitrogen (N) and oxygen (O) heteroatoms during pyrolysis of the WPU interact with the surface oxide on the silicon (Si) particles via hydrogen bonding (Si–OH⋯N and Si–OH⋯O). The N and O atoms involved in the carbon network can interact with the lithium ions, which is conducive to lithium-ion insertion. A satisfactory performance of the Si@N, O-doped carbon (Si@CNO) anode is gained at 25 and 55°C. The Si@CNO anode shows stable cycling performance (capacity retention of 70.0% over 100 cycles at 25°C and 60.3% over 90 cycles at 55°C with a current density of 500 mA g −1 ) and a superior rate capacity of 864.1 mA h g −1 at 1000 mA g −1 (25°C). The improved electrochemical performance of the Si@CNO electrode is attributed to the enhanced electrical conductivity and structural stability.

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Anion Storage Behavior of Graphite Electrodes in LiBF4/Sulfone/Ethyl Methyl Carbonate Solutions

Langmuir ◽

10.1021/acs.langmuir.9b02758 ◽

2019 ◽

Vol 35 (46) ◽

pp. 14804-14811 ◽

Cited By ~ 5

Author(s):

Yunju Wang ◽

Jiayu Li ◽

Yuhao Huang ◽

Hongyu Wang

Keyword(s):

Graphite Electrodes ◽

Ethyl Methyl ◽

Ethyl Methyl Carbonate ◽

Carbonate Solutions ◽

Storage Behavior ◽

Methyl Carbonate

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Electrochemical Behavior of NH4F-Pretreated Li1.25Ni0.20Fe0.13Co0.33Mn0.33O2 Cathodes for Lithium-ion Batteries

Applied Sciences ◽

10.3390/app10031021 ◽

2020 ◽

Vol 10 (3) ◽

pp. 1021

Author(s):

Yonglei Zheng ◽

Yikai Li ◽

He Wang ◽

Siheng Chen ◽

Xiangxin Guo ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Electrochemical Impedance ◽

Lithium Ion ◽

X Ray Diffraction ◽

Capacity Retention ◽

Hierarchical Microspheres ◽

Electrochemical Cycling ◽

Novel Method ◽

Diffraction Patterns ◽

Discharge Capacities

We report a novel method to fabricate lithium-ion batteries cathodes with the NH4F pretreatment. In this study, NH4F-pretreated Li1.25Ni0.20Fe0.13Co0.33Mn0.33O2 hollow nano-micro hierarchical microspheres were synthesized for use as cathode materials. The X-ray diffraction patterns of NH4F-pretreated Li1.25Ni0.20Co0.33Fe0.13Mn0.33O2 were analyzed with the RIETAN-FP software program, and the results showed that the samples possess a layered α-NaFeO2 structure. The effects of pretreatment with NH4F on the electrochemical performance of the pristine material were evaluated through charge/discharge cycling, the rate performance, and electrochemical impedance spectroscopy (EIS). Pretreatment with NH4F significantly improved the discharge capacities and coulombic efficiencies of Li1.25Ni0.20Co0.33Fe0.13Mn0.33O2 in the first cycle and during subsequent electrochemical cycling. The sample pretreated with an appropriate amount of NH4F (NFCM 90) showed the highest discharge capacity (209.1 mA h g−1) and capacity retention (85.2% for 50 cycles at 0.1 C). The EIS results showed that the resistance of the NFCM 90 sample (76.32 Ω) is lower than that of the pristine one (206.2 Ω).

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