2D Layered Graphitic Carbon Nitride Sandwiched with Reduced Graphene Oxide as Nanoarchitectured Anode for Highly Stable Lithium-ion Battery

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Electrochimica Acta, ISSN: 0013-4686, Vol: 237, Page: 69-77

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Subramaniyam, Chandrasekar Mayandi; Deshmukh, Kavita; Tai, Zhixin; Mahmood, Nasir; Deshmukh, Abhay; Goodenough, John; Dou, Shi Xue; Liu, Hua-Kun
Elsevier BV
Chemical Engineering; Chemistry; Engineering; Physical Sciences and Mathematics
article description
Two dimensional (2D) nanomaterials with high gravimetric capacity and rate capability are a key strategy for the anode of a Li-ion battery, but they still pose a challenge for Li-ion storage due to limited conductivity and an inability to alleviate the volume change upon lithiation and delithiation. In this paper, we report the construction of a 3D architecture anode consisting of exfoliated 2D layered graphitic carbon nitride (g-C 3 N 4 ) and reduced graphene oxide (rGO) nanosheets (CN-rGO) by hydrothermal synthesis. First, bulk g-C 3 N 4 is converted to nanosheets to increase the edge density of the inert basal planes since the edges act as active Li-storage sites. This unique 3D architecture, which consists of ultrathin g-C 3 N 4 nanosheets sandwiched between conductive rGO networks, exhibits a capacity of 970 mA h g −1 after 300 cycles, which is 15 fold higher than the bulk g-C 3 N 4. The tuning of the intrinsic structural properties of bulk g-C 3 N 4 by this simple bottom-up synthesis has rendered a 3D architectured material (CN-rGO) as an effective negative electrode for high energy storage applications.