Integration of high capacity materials into interdigitated mesostructured electrodes for high energy and high power density primary microbatteries

摘要

Microbatteries are increasingly important for powering electronic systems, however, the volumetric energy density of microbatteries lags behind that of conventional format batteries. This paper reports a primary microbattery with energy density 45.5 mu Wh cm(-2) mu m(-1) and peak power 5300 mu W cm(-2) mu m(-1), enabled by the integration of large volume fractions of high capacity anode and cathode chemistry into porous micro-architectures. The interdigitated battery electrodes consist of a lithium metal anode and a mesoporous manganese oxide cathode. The key enabler of the high energy and power density is the integration of the high capacity manganese oxide conversion chemistry into a mesostructured high power interdigitated bicontinuous cathode architecture and an electrodeposited dense lithium metal anode. The resultant energy density is greater than previously reported three-dimensional micro batteries and is comparable to commercial conventional format lithium-based batteries. (C) 2016 Elsevier B.V. All rights reserved.