Journal
ADVANCED MATERIALS
Volume 31, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201806005
Keywords
durability; energy density; hybrid micro-supercapacitors; Zn-ion
Categories
Funding
- German Research Foundation (DFG) within the Cluster of Excellence Center for Advancing Electronics Dresden (cfaed)
- Initiative and Networking Fund of the German Helmholtz Association
- Helmholtz International Research School for Nanoelectronic Networks NanoNet [VH-KO-606]
- Hamburg Science Award
- ERC Grant under 2DMATER
- HIPER-G
- NSFC [21720102002, 51722304]
- EU Graphene Flagship
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On-chip micro-supercapacitors (MSCs), as promising power candidates for microdevices, typically exhibit high power density, large charge/discharge rates, and long cycling lifetimes. However, as for most reported MSCs, the unsatisfactory areal energy density (<10 mu Wh cm(-2)) still hinders their practical applications. Herein, a new-type Zn-ion hybrid MSC with ultrahigh areal energy density and long-term durability is demonstrated. Benefiting from fast ion adsorption/desorption on the capacitor-type activated-carbon cathode and reversible Zn stripping/plating on the battery-type electrodeposited Zn-nanosheet anode, the fabricated Zn-ion hybrid MSCs exhibit remarkable areal capacitance of 1297 mF cm(-2) at 0.16 mA cm(-2) (259.4 F g(-1) at a current density of 0.05 A g(-1)), landmark areal energy density (115.4 mu Wh cm(-2) at 0.16 mW cm(-2)), and a superb cycling stability without noticeable decay after 10 000 cycles. This work will inspire the fabrication and development of new high-performance microenergy devices based on novel device design.
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