Electrodeposited Cu2Sb as anode material for 3-dimensional Li-ion microbatteries

Emilie Perre (1, 2, 3) , Pierre Louis Taberna (1, 2) , Driss Mazouzi (2, 4) , Philippe Poizot (2, 4) , Torbjörn Gustafsson (2, 3) , Kristina Edström (2, 3) , Patrice Simon (1, 2)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 ALISTORE-ERI - Advanced Lithium Energy Storage Systems - ALISTORE-ERI
3 Angström Laboratory
4 UPJV - Université de Picardie Jules Verne

An increasing demand on high energy and power systems has arisen not only with the development of electric vehicle (EV), hybrid electric vehicle (HEV), telecom, and mobile technologies, but also for specific applications such as powering of microelectronic systems. To power those microdevices, an extra variable is added to the equation: a limited footprint area. Three-dimensional (3D) microbatteries are a solution to combine high-density energy and power. In this work, we present the formation of Cu2Sb onto three-dimensionally architectured arrays of Cu current collectors. Sb electrodeposition conditions and annealing post treatment are discussed in light of their influence on the morphology and battery performances. An increase of cycling stability was observed when Sb was fully alloyed with the Cu current collector. A subsequent separator layer was added to the 3D electrode when optimized. Equivalent capacity values are measured for at least 20 cycles. Work is currently devoted to the identification of the causes of capacity fading.

Mots clés: Li; Energy storage; Microstructure

Domaines: Energie électrique

Emilie Perre, Pierre Louis Taberna, Driss Mazouzi, Philippe Poizot, Torbjörn Gustafsson, et al.. Electrodeposited Cu2Sb as anode material for 3-dimensional Li-ion microbatteries. Journal of Materials Research, 2011, vol. 25 (n° 08), pp. 1485-1491. ⟨10.1557/JMR.2010.0190⟩. ⟨hal-01168173⟩