Formation and growth of surface films on graphitic anode materials for Li-ion batteries
Formation and growth of surface films on graphitic anode materials for Li-ion batteries
复制标题
DOI：
10.1149/1.1850390
复制
发表时间：
2005-01-01
影响因子：
--
通讯作者：
Abraham, KM
中科院分区：
文献类型：
--
作者：
Gnanaraj, JS;Thompson, RW;Abraham, KM
在Li/C电池中石墨电极的阻抗谱中观察到的感应回路归因于（Li 1-XC 6）/C-6浓差电池的形成，电流从该浓差电池流动，与Li嵌入石墨中相反，与感应回路的产生条件一致。由于固体电解质中间相（SEI）的泄漏性质，电流在（Li 1-XC 6）/C-6浓差电池中发生，所述固体电解质中间相（SEI）在SEI的形成阶段期间将电极中的碳或石墨的富锂岛和缺锂岛隔离。提出了与实验数据吻合较好的等效电路模型。(C)2005年电化学学会。
The inductive loop observed in the impedance spectra of the graphite electrode in Li/C cells is attributed to the formation of a (Li1-XC6)/C-6 concentration cell from which current flows in opposition to Li intercalation into graphite, consistent with the conditions for the generation of an inductive loop. The current flow occurs in the (Li1-XC6)/C-6 concentration cell because of the leaky nature of the solid electrolyte interphase (SEI) that isolates Li-rich and Li-deficient islands of carbon or graphite in the electrode during the SEI's formation stage. An equivalent circuit model has been proposed that fits the experimental data well. (C) 2005 The Electrochemical Society.