Xu H, Fan J, Su H, Liu C, Chen G, Dall'Agnese Y, Gao Y. Metal
Ion-Induced Porous MXene for All-Solid-State Flexible Supercapacitors.
Nano Lett 2023;
23:283-290. [PMID:
36566449 DOI:
10.1021/acs.nanolett.2c04320]
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Abstract
MXenes are normally used for energy storage applications. However, large nanosheets and restacking are detrimental to the ion diffusion and thus limit its rate capability. Here, a strategy to prepare flexible and porous MXene-M supercapacitor electrodes can simultaneously enlarge the interlayer spacing between layers and create holes in the layers. As a result, Ti3C2Tx-Mn presents an excellent lifespan, with still 248 F g-1 after 100 000 cycles at a current density of 100 A g-1. Moreover, Ti3C2Tx-Mn-based symmetric all-solid-state supercapacitor exhibits outstanding volumetric energy up to 52.4 mWh cm-3 and retains 38.4 mWh cm-3 at an ultrahigh volumetric power density of 55.3 W cm-3. We believe this work provides an idea for the later regulation of MXene layer spacing and the design of porous structures, and can be widely used in the next-generation high-energy density and power density practical applications.
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