Multiscale Observations of Inhomogeneous Bilayer SEI Film on a Conversion‐Alloying SnO 2 Anode

Small Methods ◽  
2021 ◽  
pp. 2101111
Author(s):  
Xuexia Lan ◽  
Jie Cui ◽  
Xingyu Xiong ◽  
Jiayi He ◽  
Hechuan Yu ◽  
...  
Keyword(s):  
Sei Film

An Electrochemical Impedance Spectroscopy (EIS) Study of Zn-Doped Li (Ni1/3Co1/3Mn1/3) O2 Cathode Materials in the First Delithiation Process

2013 ◽  
Vol 833 ◽  
pp. 50-55 ◽  
Author(s):  
Lu Zheng ◽  
Liang Bin Liu ◽  
Xiao Jing Zhou ◽  
Yu Zhong Guo
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Cathode Materials ◽  
Electrochemical Impedance ◽  
Crystalline Lattice ◽  
Zn Doping ◽  
Voltage Range ◽  
Sei Film ◽  
Zinc Doping ◽  
Co Precipitation

Li (Ni1/3Co1/3Mn1/3) O2 cathode materials doped by Zn were synthesized by a co-precipitation routine, the first delithiation process of the samples with 0-4wt% of Zn doping were studied by electrochemical impedance spectroscopy (EIS) under the polarized voltage of 2.8-4.6V. The fitting results based on EIS data indicate that delithiation reactions happen within the voltage range of 3.7-4.4V ; The resistances of SEI film and charge transfer are both decreased significantly, whereas Li+ diffusion ability through layered crystalline lattice is improved largely with the increase of zinc doping from 0 to 4wt%.

Reaction Behavior between Li and NiO Thin Film by EIS

2010 ◽  
Vol 150-151 ◽  
pp. 1603-1606
Author(s):  
Yu Cai ◽  
Zhao Yang Wu ◽  
Sheng Li Zhao ◽  
Ji Ne Zhu
Keyword(s):  
Electrochemical Impedance ◽  
Measurement Data ◽  
Lithium Ion ◽  
Open Circuit ◽  
Reaction Behavior ◽  
Polarization Voltage ◽  
Sei Film ◽  
Nio Thin Film ◽  
Pass Through ◽  
Impedance Property

The variation of impedance property during the 1st charge/discharge course was investigated by electrochemical impedance spectroscopy (EIS). The results show that the proposed equivalent circuit of RS(Qdl(RCtZW))(QSEIRSEI) perfectly simulating the EIS measurement data and all the errors less than 5% can reasonably explain the course of the reaction between Li and NiO electrode. The SEI film which distinctly influences the electrochemical performance of lithium ion battery is free at open circuit voltage. It begins to slowly grow at polarization voltage of 1.5V and completely forms at 0.3V in the 1st discharge. To react further with NiO, the Li+ must pass through SEI film and generate the fine grains Ni and amorphous Li2O matrix. SEI film partially decomposes and the NiO and Li are formed by reversible reaction of Ni and Li2O in the charge course.

Dendrite-free lithium metal anodes: stable solid electrolyte interphases for high-efficiency batteries

2015 ◽  
Vol 3 (14) ◽  
pp. 7207-7209 ◽  
Author(s):  
Xin-Bing Cheng ◽  
Qiang Zhang
Keyword(s):  
Solid Electrolyte ◽  
High Efficiency ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Batteries ◽  
Sei Film ◽  
Lithium Metal Anodes ◽  
Li Metal Anode ◽  
Utilization Ratio ◽  
Superior Cycling Stability

A more superior cycling stability and a higher utilization ratio of the Li metal anode have been achieved by additive- and nanostructure-stabilized SEI layers. A profound understanding of the composition, internal structure, and evolution of the SEI film sheds new light on dendrite-free high-efficiency lithium metal batteries.

Stable artificial solid electrolyte interphase films for lithium metal anode via metal–organic frameworks cemented by polyvinyl alcohol

2020 ◽  
Vol 8 (1) ◽  
pp. 251-258 ◽  
Author(s):  
Lishuang Fan ◽  
Zhikun Guo ◽  
Yu Zhang ◽  
Xian Wu ◽  
Chenyang Zhao ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Metal Organic Framework ◽  
Solid Electrolyte Interphase ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Sei Film ◽  
Metal Organic ◽  
Li Metal Anode ◽  
The Stability

Polyvinyl alcohol (PVA) as a “glue” to cement the metal organic framework (Zn-MOF) sheet as a reasonable artificial SEI film. The artificial SEI film can efficiently adapt to the changes of the volume during the cycle, significantly improve the stability of the Li metal anode.

Novel LixSiSy/Nafion as an artificial SEI film to enable dendrite-free Li metal anodes and high stability Li–S batteries

2020 ◽  
Vol 8 (18) ◽  
pp. 8979-8988 ◽  
Author(s):  
Qi Jin ◽  
Xitian Zhang ◽  
Hong Gao ◽  
Lu Li ◽  
Zhiguo Zhang
Keyword(s):  
High Stability ◽  
Composite Layer ◽  
Metal Anode ◽  
Sei Film ◽  
Li Metal Anode ◽  
The Stability ◽  
Metal Anodes

We propose an approach for Li metal anode protection by in situ growth of a LixSiSy/Nafion composite layer on the surface of the Li metal as an artificial SEI film to significantly enhance the stability of the Li metal anode.

A Theoretical Study of Growth of Solid-Electrolyte-Interphase Films in Lithium-Ion Batteries with Organosilicon Compounds

MRS Advances ◽  
2019 ◽  
Vol 4 (14) ◽  
pp. 801-806 ◽  
Author(s):  
Suguru Ueda ◽  
Kumpei Yamada ◽  
Kaoru Konno ◽  
Minoru Hoshino ◽  
Katsunori Kojima ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Organic Liquid ◽  
Solid Electrolyte Interphase ◽  
Structural Evolution ◽  
Lithium Ion ◽  
Liquid Electrolyte ◽  
Cycle Performance ◽  
Anode Surface ◽  
Decomposition Products ◽  
Sei Film

ABSTRACTWe attempt to reveal how electrolyte additives affect the structural evolution of the solid electrolyte interphase (SEI) film on the anode surface of a lithium-ion secondary battery. Employing the hybrid Monte-Carlo/molecular-dynamics method, we theoretically investigate the SEI film structures in organic liquid-electrolyte systems with and without an organosilicon additive. The results show that the excessive growth of the SEI film is suppressed by introducing the organosilicon additives. It is further elucidated that the decomposition products of the organosilicon molecules are stably aggregated in the vicinity of the anode surface, and protect the electrolyte solvents and the lithium salts from the further reductive decomposition. These findings imply that the organosilicon additive possibly improves the cycle performance of LIBs owing to the formation of the effective SEI film.

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