Title :
High power lithium ion microbatteries with lithographically defined 3-D porous electrodes
Author :
Pikul, J. ; Zhang, Haijun ; Cho, Jeon-Wook ; Braun, Peter ; King, W.
Author_Institution :
Univ. of Illinois at Urbana - Champaign, Champaign, IL, USA
Abstract :
High performance miniature power sources could enable new microelectronic systems. We report lithium ion microbatteries having power densities up to 7.4 mW/cm2 μm, which equals or exceeds that of the best supercapacitors, and which is 2,000 times higher than that of other microbatteries. The battery microarchitecture optimizes ion and electron transport for high power density while maintaining a high volume of active material for high energy density. The architecture consists of three-dimensional bicontinuous interdigitated microelectrodes and can be scaled to larger sizes without sacrificing power and energy density.
Keywords :
electrochemical electrodes; electron transport theory; lithography; microelectrodes; micromechanical devices; porosity; secondary cells; supercapacitors; 3D bicontinuous interdigitated microelectrode; 3D porous electrode; battery microarchitecture; electron transport optimization; energy density; ion transport optimization; lithium ion microbattery; lithography; microelectronic system; power density; supercapacitor; Anodes; Batteries; Computer architecture; Density measurement; Materials; Power system measurements;
Conference_Titel :
Micro Electro Mechanical Systems (MEMS), 2013 IEEE 26th International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4673-5654-1
DOI :
10.1109/MEMSYS.2013.6474378
