Various applications of functional devices need a tailored and reliable supply of electrical energy. Batteries are electrochemical systems that deliver energy for functional devices and applications. Due to the common use, several rigid types of batteries have been standardized. To fully integrate the battery into a product that is bendable, free in geometry and less than 1 mm thick, printing of power adaptable batteries is a challenging area of research. Therefore, the well-known zinc-manganese system, which is very promising due to its environmental sustainability and its simplicity, has been used to manufacture battery solutions on a new kind of substrate: technical textiles. Another challenge is the deposition of conductive patterns. At present, embroidery with metallic yarn is the only possibility to provide conducting paths on technical textiles, a time-consuming and elaborate process. Screen printed conductive pathways will generate a new momentum in the manufacturing of conductivity on textiles.

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In the last years, hybrid battery-supercapacitors have been a rising interest toward the improvement of both the energy density and power density in comparison to the classical systems [1]. By using Li-insertion materials and activated carbon it is possible to develop high energy and high power density Li-ion supercapacitors. Among the various numbers of Li-ion materials, Li3V1.95Ni0.05(PO4)3/C shows excellent performances at very high C-rates, with very high specific discharge capacity (93 mA h g-1 at 100 C) and a capacity retention of 97% after 1000 cycles [2]. Most of the currently used Li-ion battery electrodes are based on poly(vinylidene difluoride) (PVDF) due to its good electrochemical stability and binding capability within the electrode composite. However, the cost and the environmental impacts of these widely used PVDF based electrodes are still a concern in the battery industry. Thus, lot of effort has been put toward the pursuit of an environment-friendly, cost-effective binder for lithium-ion batteries, such as carboxymethyl cellulose (CMC) and polyacrylic acid (PAA) [3].In this study, the effect of CMC and PAA binders in the battery-like counter part on the mechanical and electrochemical behaviour in the hybrid battery-supercapacitor electrodes is explored (see Table 1). In particular, Li3V1.95Ni0.05(PO4)3/C has been studied both as high energy and high power anode and cathode, between 3.0-1.5 and 3.0-4.3 V vs. Li+/Li. Commercial activated carbon (AC) (Haycard) and LP30 (Merck) has been used as counter electrode and electrolyte, respectively. Furthermore, the functionalization of PAA during the electrode preparation will be investigated and shown during the presentation.   Table 1. Electrode compositions. Compositions Active material LVNP / wt.% Conductive agent Super P / wt.% Binder /wt.% 1 80 10 9% CMC + 1% SBR 2 85 5 9% CMC + 1% SBR 3 86 5 9% PAA   References [1] D. Cericola, R. Kötz, Electrochim. Acta 72 (2012) 1–17. [2] M. Secchiaroli, G. Giuli, B. Fuchs, R. Marassi, M. Wohlfahrt-Mehrens, S. Dsoke, DOI: 10.1039/c5ta00976f. [3] J. Chong, S. Xun, H. Zheng, X. Song, G. Liu, P. Ridgway, J. Q. Wang, V. S. Battaglia, J. Power Sources 196 (2011) 7707– 7714. Acknowledgments Financial support from the German Federal Ministry of Education and Research (BMBF) under the grant 03EK3021 is gratefully acknowledged.