Zn-ion Micro-battery Based on Rolled-up Tube Electrodes

Datum

20.06.2018

Zeit

13:30 - 14:30

Sprecher

Yang Li

Zugehörigkeit

IIN, Leibniz IFW Dresden

Sprache

en

Hauptthema

Materialien

Andere Themen

Materialien, Physik

Host

Kristina Krummer-Meier

Beschreibung

Microscale power sources have been considered as key devices for providing autonomy to microelectronic devices such as smart micro-robots, miniaturized sensors[1,2]. There has been much promising progress in miniaturization and integration of power sources in the past decade. Although thin film batteries are well-suited for on-chip integration, their areal energy density and power density are still limited. To increase the areal performance of microscale power sources, three-dimensional (3D) micro-/nano-electrodes have been proposed recently. Tremendous efforts have been put towards on designing and developing smart 3D energy storage systems[3]. In this seminar, I will demonstrate a novel 3D micro-battery scaffold which consists of a pair of winded micro tubes in parallel (Finger). By employing rolled-up nanotechnology[4], patterned Ti/Au thin films were rolled into tubular micro-structures at the pre-defined positions. Subsequently, anode (Zn) and cathode (MnO2) active materials were deposited on the metallic scaffold by using electrochemical deposition method. After sealing with electrolyte, the micro-battery based on 3D metallic scaffold is complete, which only take 0.09 mm2 for one full micro-battery. This 3D micro-battery system presents very good electrochemical performance. An outstanding reversible areal capacity up to 67 µA h cm-2 at 500 µA cm-2 has been achieved. Besides, this 3D micro-battery possesses a very high capacity retention ratio even after 50 cycles. These initial results provide a noval and powerful platform to develop mininaturized batteries and demonstrate a promising future of the application of rolled-up nanotechnology in energy storage field. References: [1] F. L. Cras, B. Pecquenard, V. Dubois, V. P. Phan, D. G. Bouyssou, Adv. Energy Mater. 2015, 5, 1501061. [2] M. Létiche, E. Eustache, J. Freixas, A. Demortière, V. D. Andrade, L. Morgenroth, P. Tilmant, F. Vaurette, D. Troadec, P. Roussel, T. Brousse, C. Lethien, Adv. Energy Mater. 2017, 7, 1601402 [3] N. Hailong, J. H. Pikul, R. Zhang, X. Li, S. Xu, J. Wang, J. A. Rogers, W. P. King, P.V. Braun. PNAS. 2015, 21, 6573. [4] O. G. Schmidt, K. Eberl, Nature, 2001, 410, 168.

Links

• Seminars at the IFW

Letztmalig verändert: 20.06.2018, 02:07:54