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3D Interconnected Porous Graphene Sheets Loaded with Cobalt Oxide Nanoparticles for Lithium‐Ion Battery Anodes
Author(s) -
Puthusseri Dhanya,
Aravindan Vanchiappan,
Madhavi Srinivasan,
Ogale Satishchandra
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201500497
Subject(s) - materials science , graphene , anode , chemical engineering , nanomaterials , specific surface area , composite number , oxide , battery (electricity) , lithium ion battery , lithium (medication) , nanoparticle , cobalt oxide , cobalt , nanocomposite , porosity , nanotechnology , energy storage , electrode , composite material , chemistry , catalysis , organic chemistry , metallurgy , medicine , power (physics) , physics , endocrinology , engineering , quantum mechanics
Nanomaterials with high surface‐to‐volume ratio and tunable electronic and optical properties have expanded their use in variety of applications, especially energy conversion and storage. Here we report on the synthesis of a cobalt oxide (Co 3 O 4 )/3D‐interconnected porous graphene (PG) nanocomposite by using a simple solvothermal route and its application as a Li‐ion battery anode. Among the different compositions investigated, the composite PG‐600 (with 50 % PG) showed a discharge capacity of 700 mAh g −1 at a current density of 500 mA g −1 and maintained 90 % retention after 80 cycles. The high surface area of the 3D PG sheets helps the Co 3 O 4 nanoparticles to form a uniform dispersion on the surfaces. The increased surface area (accessibility) and electrical conductivity of the composite result in significant enhancement in the capacity, cycling stability, and rate capability than the native Co 3 O 4 phase.