材料科学
原子层沉积
纳米技术
薄膜
图层(电子)
锂(药物)
光电子学
平面的
计算机科学
医学
计算机图形学(图像)
内分泌学
作者
Manon Létiche,Étienne Eustache,Jérémy Freixas,Arnaud Demortière,Vincent De Andrade,Laurence Morgenroth,Pascal Tilmant,F. Vaurette,David Troadec,Pascal Roussel,Thierry Brousse,Christophe Lethien
标识
DOI:10.1002/aenm.201601402
摘要
Nowadays, millimeter scale power sources are key devices for providing autonomy to smart, connected, and miniaturized sensors. However, until now, planar solid state microbatteries do not yet exhibit a sufficient surface energy density. In that context, architectured 3D microbatteries appear therefore to be a good solution to improve the material mass loading while keeping small the footprint area. Beside the design itself of the 3D microbaterry, one important technological barrier to address is the conformal deposition of thin films (lithiated or not) on 3D structures. For that purpose, atomic layer deposition (ALD) technology is a powerful technique that enables conformal coatings of thin film on complex substrate. An original, robust, and highly efficient 3D scaffold is proposed to significantly improve the geometrical surface of miniaturized 3D microbattery. Four functional layers composing the 3D lithium ion microbattery stacking has been successfully deposited on simple and double microtubes 3D templates. In depth synchrotron X‐ray nanotomography and high angle annular dark field transmission electron microscope analyses are used to study the interface between each layer. For the first time, using ALD, anatase TiO 2 negative electrode is coated on 3D tubes with Li 3 PO 4 lithium phosphate as electrolyte, opening the way to all solid‐state 3D microbatteries. The surface capacity is significantly increased by the proposed topology (high area enlargement factor – “thick” 3D layer), from 3.5 μA h cm −2 for a planar layer up to 0.37 mA h cm −2 for a 3D thin film (105 times higher).
科研通智能强力驱动
Strongly Powered by AbleSci AI