Hard carbon/lithium composite anode materials for Li-ion batteries

• Published in: Electrochimica acta Vol. 52; no. 13; pp. 4312 - 4316
• Main Authors: Sun, Hao, He, Xiangming, Ren, Jianguo, Li, Jianjun, Jiang, Changyin, Wan, Chunrong
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.03.2007; Elsevier
• Subjects: Applied sciences; Composite anode; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Hard carbon; Initial irreversible capacity; Li-ion batteries; Lithium foil; Initial irreversible capacity; Hard carbon; Lithium foil; Li-ion batteries; Composite anode; Cycling; Anode; Lithium; Secondary cell; Electrode material; Discharge charge cycle; Composite electrode; Lithion ion batteries; Specific capacity; Electrical characteristic; Modified material
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2006.12.012

Hard carbon/lithium composite anode electrode is prepared to reduce the initial irreversible capacity of hard carbon, which hinders practical application of hard carbon in lithium ion batteries, by introducing lithium into hard carbon. Lithium foil effectively compensates the irreversible capacity of hard carbon in the first cycle. A full cell using LiCoO 2 cathode and the composite anode shows much higher initial coulombic efficiency than that of a cell using LiCoO 2 cathode and hard carbon anode. This paves the way to reduce the large initial irreversible capacity of hard carbon. Besides that, this composite anode enables conductive polymer/sulfur composite cathode to be used in Li-ion batteries with non-lithiated anode materials.