Curved Fragmented Graphenic Hierarchical Architectures for Extraordinary Charging Capacities
Journal
Small
Journal Volume
14
Journal Issue
27
Date Issued
2018
Author(s)
Lian H.-Y.
Dutta S.
Tominaka S.
Lee Y.-A.
Huang S.-Y.
Sakamoto Y.
Hou C.-H.
Liu W.-R.
Henzie J.
Yamauchi Y.
Abstract
An approach to assemble hierarchically ordered 3D arrangements of curved graphenic nanofragments for energy storage devices is described. Assembling them into well-defined interconnected macroporous networks, followed by removal of the template, results in spherical macroporous, mesoporous, and microporous carbon microball (3MCM) architectures with controllable features spanning nanometer to micrometer length scales. These structures are ideal porous electrodes and can serve as lithium-ion battery (LIB) anodes as well as capacitive deionization (CDI) devices. The LIBs exhibit high reversible capacity (up to 1335 mAh g?1), with great rate capability (248 mAh g?1 at 20 C) and a long cycle life (60 cycles). For CDI, the curved graphenic networks have superior electrosorption capacity (i.e., 5.17 mg g?1 in 0.5 ¡Ñ 10?3m NaCl) over conventional carbon materials. The performance of these materials is attributed to the hierarchical structure of the graphenic electrode, which enables faster ion diffusion and low transport resistance. ? 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Subjects
capacitive deionization
charging capacity
curved graphene
porous carbon
X-ray pair distribution
SDGs
Other Subjects
Carbon; Electrodes; Lithium-ion batteries; Microporosity; Network architecture; Porous materials; Sodium chloride; Capacitive deionization; Hierarchical architectures; Hierarchical structures; High reversible capacities; Micro-porous carbons; Pair distributions; Porous carbons; Transport resistance; Charging (batteries)
Type
journal article