Lithium-Ion Intercalation into Graphite in SO2-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries,ACS Applied Materials & Interfaces

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Lithium-Ion Intercalation into Graphite in SO2-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-02-08 00:00:00 , DOI: 10.1021/acsami.8b20025
Ayoung Kim ₁ , Hojae Jung ₁ , Juhye Song ₁ , Hyun Jong Kim ₁ , Goojin Jeong ₂ , Hansu Kim ₁

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Herein, we have identified that lithium ions in an SO₂-based inorganic electrolyte reversibly intercalate and deintercalate into/out of graphite electrode using ex situ X-ray diffraction and various electrochemical methods. X-ray photoelectron spectroscopy shows that the solid electrolyte interphase on the graphite electrode is mainly composed of inorganic compounds, such as LiCl and lithium sulfur-oxy compounds. Graphite electrode in SO₂-based inorganic electrolyte has stable capacity retention up to 100 cycles and outstanding rate capability performance. This can be attributed to low interfacial impedance and high ionic conductivity of SO₂-based inorganic electrolyte, which are superior to those of conventional organic electrolytes. Considering the remarkable rate capability and intrinsically nonflammable properties of the electrolyte, use of graphite and an SO₂ electrolyte will likely facilitate the development of advanced lithium-ion batteries.

中文翻译：

锂离子嵌入到SO _2基无机电解质中的石墨中，以实现高速率和安全的锂离子电池

在本文中，我们已经发现，使用异位X射线衍射和各种电化学方法，基于SO ₂的无机电解质中的锂离子可逆地嵌入和脱嵌到石墨电极中/从石墨电极中脱嵌。X射线光电子能谱表明，石墨电极上的固体电解质相间主要由无机化合物组成，例如LiCl和锂硫氧基化合物。SO ₂基无机电解质中的石墨电极具有高达100次循环的稳定容量保持率和出色的倍率性能。这可以归因于SO _2的低界面阻抗和高离子电导率基无机电解质，优于常规有机电解质。考虑到电解液的显着倍率性能和本质上不可燃的特性，使用石墨和SO ₂电解液将可能促进高级锂离子电池的开发。

更新日期：2019-02-08

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