Study on compositions and changes of SEI film of Li2MnO3 positive material during the cycles

被引：18

作者：

Cheng, Meng ^{[1
,2
]}

Tang, Weiping ^{[3
]}

Li, Yong ^{[3
]}

Zhu, Kongjun ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Aerosp Engn, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China

[2] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Nanjing 210016, Peoples R China

[3] Shanghai Inst Space Power Sources, Shanghai 200000, Peoples R China

来源：

CATALYSIS TODAY | 2016年 / 274卷

关键词：

Li2MnO3; electrodes; Side reaction; SEI film; Surface corrosion; ELECTRODE; LI; SURFACE; DEPOSITION; INTERFACE;

D O I：

10.1016/j.cattod.2016.01.040

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this article, we investigated the surface series of Li2MnO3 electrodes and the composition variation of the SEI film. XPS and FT-IR analysis indicated the compositions of a primary SEI film, containing about 20 at.% LiF, varied upon cycling including the dissolution of LiF and the accumulation of LiPOyFz and organic species, accompanied by surface corrosion. Whereas organic species showed minor change by the static corrosion. The unstable passive film caused high impedance and could not restrain the electrolyte corrosion in both dynamic and static process. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：116 / 122

页数：7

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