Lithium intercalated graphite with preformed passivation layer as superior anode for Lithium ion batteries

被引：24

作者：

Choi, Sukyoung ^{[1
]}

Jung, Gyujin ^{[1
]}

Kim, Jong Eun ^{[1
]}

Lim, TaeYoung ^{[2
]}

Suh, Kwang S. ^{[1
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, 5-1 Anam Dong, Seoul 136713, South Korea

[2] Gachon Univ, Dept Bionanotechnol, 1342 Seongnamdaero, Seongnam 13120, South Korea

来源：

APPLIED SURFACE SCIENCE | 2018年 / 455卷

基金：

新加坡国家研究基金会;

关键词：

Li-ion battery; Graphite anode; Li pre-charging; Passivating layer; Solid electrolyte interphase; SOLID-ELECTROLYTE INTERPHASE; RAY PHOTOELECTRON-SPECTROSCOPY; INFRARED-SPECTROSCOPY; CHEMICAL-COMPOSITION; NEGATIVE ELECTRODES; THERMAL-STABILITY; SURFACE; SEI; CELLS; INTERFACE;

D O I：

10.1016/j.apsusc.2018.05.229

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Graphite has been the most common anode materials in the Li-ion batteries (LIBs). However, it has a limited Coulombic efficiency and cycling stability which are crucial for the practical use of LIBs. Here, we present a lithium (Li)-intercalated graphite (LIG) electrode with a stable passivating layer on the surface for an improved electrochemical performance. The LIG was prepared by thermal treatment of commercial graphite in the presence of Li metal vapor and subsequent exposure to air. Characterization revealed that the surface of LIG was passivated by a thin inorganic compound (Li2CO3). This passivation layer on the graphite surface function as a preformed stable solid electrolyte interphase (SEI) films and allows the graphite electrode to deliver a high reversible capacity, high Coulombic efficiency, and stable cycle life.

引用

页码：367 / 372

页数：6

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