Temperature dependent capacity contribution of thermally treated anode current collectors in lithium ion batteries

• Published in: Applied surface science 2013-01, Vol.264, p.419-423
• Main Authors: Kim, Tae Kwon, Li, Xifei, Wang, Chunlei
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Current collectors; Electrochemical performance; Energy capacity; Exact sciences and technology; Lithium ion battery; Physics; Thermal treatment
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2012.10.037

► We studied the influence of the thermal treatment of current collectors on the energy capacity. ► Different current collectors show different thermal treatment effect on performance. ► The non-negligible capacity contribution is closely related to the treatment temperatures. ► Our results could be beneficial to designing battery architectures. Metal current collectors, offering a good connection between the active materials and the external circuit, is an important component in a rechargeable lithium ion battery. Some necessary thermal treatment in the battery fabrication and assembly procedure results in current collectors with some non-negligible reversible energy capacities; however, these energy capacities were negligible in the previous references. In this research, for the first time, we investigated the influence of the thermal treatment of current collectors (such as copper foil and stainless steel disk) on energy capacities. Our results indicate that different current collector materials have different thermal treatment effects on their electrochemical performance. The non-negligible capacity contribution is closely related to the treatment temperature.