Integrated Anode Electrode Composited Cu-Sn Alloy and Separator for Microscale Lithium Ion Batteries.

Author(s) Liu, Y.; Jiang, K.; Yang, S.
Journal Materials (Basel)
Date Published 2019 Feb 18

A novel integrated electrode structure was designed and synthesized by direct electrodepositing of Cu⁻Sn alloy anode materials on the Celgard 2400 separator (Cel-CS electrode). The integrated structure of the Cel-CS electrode not only greatly simplifies the battery fabrication process and increases the energy density of the whole electrode, but also buffers the mechanical stress caused by volume expansion of Cu⁻Sn alloy active material; thus, effectively preventing active material falling off from the substrate and improving the cycle stability of the electrode. The Cel-CS electrode exhibits excellent cycle performance and superior rate performance. A capacity of 728 mA·h·g can be achieved after 250 cycles at the current density of 100 mA·g. Even cycled at a current density of 5 A·g for 650 cycles, the Cel-CS electrode maintained a specific capacity of 938 mA·h·g, which illustrates the potential application prospects of the Cel-CS electrode in microelectronic devices and systems.

DOI 10.3390/ma12040603
ISSN 1996-1944
Citation Materials (Basel). 2019;12(4).

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