Nanoporous ceramic composite metal

High specific capacitance, high energy density, and excellent cycling stability

Overview

　Nanoporous metals are known to have excellent electrical properties. Manganese dioxide MnO₂ is promising as an electrode material because of its high capacitance, environmental friendliness, and low cost. Lithium-ion batteries (LIB) have remarkably high power density per unit volume. In order to achieve higher capacity, active and inert composite alloy materials are being considered as electrodes for negative electrodes instead of carbon-based compounds. However, MnO₂ is difficult to apply to high-power applications because of its poor electronic conductivity and limited charge/discharge rate. Therefore, the development of MnO₂ with enhanced conductivity has become an important issue.　
　The present invention makes it possible to provide novel nanoporous metal/ceramic composite materials by combining chemical dealloying and non-electrical plating processes. An example of the present invention is a nanoporous Au/MnO₂ electrode. The present invention not only has activity as a double-layer capacitor, but also functions as a good conductor and enhances the pseudo capacitor performance of MnO₂. Therefore, it has the potential to be an electrode material for LIB with excellent electrical properties and, as an example, ultra-long life.

Battery Performance of NPG (Nanoporous Gold)/MnO₂ Composites

Product Application

・Dielectric, Electrode for SC, Lithium ion battery, Electrode for LIB
・Energy storage device, Backup power supply, and Power storage device

Related Works

[1] Nanoporous metal/oxide hybrid electrodes for electrochemical supercapacitors,Nature Nanotechnology volume 6, pages232–236 (2011)
[2] A nanoporous metal recuperated MnO2 anode for lithium ion batteries,　Nanoscale Issue 37(2015)

IP Data

IP No.　 ： JP6019533
Inventor ： CHEN Mingwei, LANG xìnyou, FUJITA Takeshi
keyword ： Lithium Ion Battery, Anode electrode for lithium batteries, Supercapacitor, Static Condenser, Dielectric, Energy Storage Devices,Backup power supply, Energy storage device