公开(公告)号：EP1722434B1

公开(公告)日：2008-08-06

申请号：EP06007805.2

申请日：2006-04-13

Applicant: STMicroelectronics S.r.l.

Inventor： D'arrigo, Guiseppe ,  Coffa, Salvatore

IPC: H01M8/10 ,  B81C1/00

CPC classification number: H01M8/1004 ,  H01M8/1097 ,  H01M2008/1095

公开(公告)号：EP1722434A1

公开(公告)日：2006-11-15

申请号：EP06007805.2

申请日：2006-04-13

Applicant: STMicroelectronics S.r.l.

Inventor： D'arrigo, Guiseppe ,  Coffa, Salvatore

IPC: H01M8/10 ,  B81C1/00

CPC classification number: H01M8/1004 ,  H01M8/1097 ,  H01M2008/1095

Abstract: Fuel cells are formed in a single layer of conductive monocrystalline silicon (1), composed of a succession of electrically isolated conductive silicon bodies (1A,1B,1C,1D) separated by narrow parallel trenches etched through the whole thickness of the silicon layer. Semicells in a back-to-back configuration are formed over etch surfaces of the separation trenches. Each semicell is formed on the etch surface of one of said silicon bodies forming an elementary cell in cooperation with an opposite semicell formed on the etch surface of the next silicon body of the succession. Adjacent semicells are separated by an ion exchange membrane resin filling the separation trench between the opposite semicells constituting a solid electrolyte (PEM) of the elementary cell. Each semicell comprises a porous conductive silicon region (12,13) permeable to fluids, extending for a certain depth from the etch surface of the silicon body, at least partially coated by a non passivable metallic material. Each of said porous and fluid permeable regions communicates with a feed duct (9,10) of a fuel fluid or of oxygen gas that extends parallel to said etch surface inside the conductive silicon body (1A,1B,1C,1D). Preferably, particles of a catalytic electrode material are in contact with said ion exchange resin and with said non passivable metal coat of the porous silicon.
The elementary cells thus formed in a monocrystalline silicon layer may be configured as an array of monopolar cells or as a battery of cells in series by realizing a different distribution of the fluid reagents through the pairs of parallel ducts (9,10) formed inside the conductive silicon bodies of (1A,1B,1C,1D).

Abstract translation: 燃料电池被形成在导电单晶硅（1），电的连续构成的单层隔离的导电硅体（1A，1B，1C，1D）由通过硅层的整个厚度被蚀刻窄的平行沟槽分开。 在后到后端配置半细胞形成在分离沟槽的蚀刻表面。 每个半单元中形成所述基本单元的配合下连续的下一个硅体的蚀刻表面上的相对的半形成的细胞形成的有机硅本体中的一个的蚀刻表面上。 相邻的半电池通过填充构成基本单元的固体电解质（PEM）相反的半电池之间的分离槽树脂的离子交换膜隔开。 每个半电池包括多孔硅导电区（12,13）可渗透流体，扩展用于从硅蚀刻体的表面一定深度，至少部分地由非被动能够金属材料涂覆。 每个所述多孔和可渗透流体的区域的与燃料流体的或氧气的进料管（9,10）进行通信那样平行于所述蚀刻表面上的导电硅体（1A，1B，1C，1D）的内部延伸。 优选地，催化电极材料的粒子与所述离子交换树脂接触，并与所述多孔硅的所述非被动能够金属涂层。 在单晶硅层如此形成的基本单元可以被配置为单极单元阵列或由通过内部所形成的双平行管道的（9,10）实现所述流体试剂的不同分布的电池单元串联的 （1A，1B，1C，1D）的导电硅体。