AI Article Synopsis
- A new type of all-solid-state asymmetric supercapacitor using atomically thin β-Co(OH)2 sheets has been developed, allowing for optimization of supercapacitor properties at the atomic level.
- The synthesized single-layer β-Co(OH)2 exhibits a high capacitance of 2028 F/g due to its increased density-of-states and fully exposed hydrogen atoms.
- This supercapacitor offers impressive performance metrics, including a cell voltage of 1.8 V, energy density of 98.9 Wh/kg, power density of 17,981 W/kg, and retains 93.2% capacitance after 10,000 cycles, indicating its potential for advanced energy storage applications.
Article Abstract
A conceptually new all-solid-state asymmetric supercapacitor based on atomically thin sheets is presented which offers the opportunity to optimize supercapacitor properties on an atomic level. As a prototype, β-Co(OH)2 single layers with five-atoms layer thickness were synthesized through an oriented-attachment strategy. The increased density-of-states and 100 % exposed hydrogen atoms endow the β-Co(OH)2 single-layers-based electrode with a large capacitance of 2028 F g(-1) . The corresponding all-solid-state asymmetric supercapacitor achieves a high cell voltage of 1.8 V and an exceptional energy density of 98.9 Wh kg(-1) at an ultrahigh power density of 17 981 W kg(-1) . Also, this integrated nanodevice exhibits excellent cyclability with 93.2 % capacitance retention after 10 000 cycles, holding great promise for constructing high-energy storage nanodevices.
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| http://dx.doi.org/10.1002/anie.201407836 | DOI Listing |
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