2013
DOI: 10.1039/c3ta12824e
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Abstract: Here, we report a novel Co 3 O 4 -graphene hybrid electrode material with high density Co 3 O 4 nanoparticles (NPs) in a size range of 2-3 nm confined in a few-layered porous graphene nanomesh (PGN) framework driven by an electrochemical process. Raman spectra indicate that Co species preferentially anchor on the defective sites of the PGN, which results in markedly reduced irreversible Li storage and therefore significantly enhanced coulombic efficiency. The ultra-small Co 3 O 4 NPs provide a large surface ar… Show more

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Cited by 63 publications
(38 citation statements)
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References 52 publications
(60 reference statements)
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“…Calculated from the EDS result, the ratio of Co/O is about 1:1.30, in close agreement with the expected stoichiometric ratio of the Co 3 O 4 phase. To our knowledge, the performance of the DM011 anode materials for LIBs presented here is the best to date [11,[40][41]. Nevertheless, the discharge capacities for E112 and E011 after 50 cycles are 354 and 300 mA h g À 1 , respectively, showing a fast capacity fading.…”
Section: Resultsmentioning
confidence: 67%
“…Calculated from the EDS result, the ratio of Co/O is about 1:1.30, in close agreement with the expected stoichiometric ratio of the Co 3 O 4 phase. To our knowledge, the performance of the DM011 anode materials for LIBs presented here is the best to date [11,[40][41]. Nevertheless, the discharge capacities for E112 and E011 after 50 cycles are 354 and 300 mA h g À 1 , respectively, showing a fast capacity fading.…”
Section: Resultsmentioning
confidence: 67%
“…The holey structure in the individual graphene sheets could not only provide effi cient diffusion channels for Li ions and a highly conductive pathway for electrons, but also provided more edges on the sheet to enhance Li intercalation. [ 31,32 ] NHGM was obtained by conjugating N-containing holey-graphene sheets into a 3D hydrogel, followed by evaporation of the trapped water under vacuum at room temperature and an annealing treatment under Ar atmosphere. This highly compact but porous architecture with heteroatom doping is favorable for ion diffusion, Li ion storage, and maximizing the LIB properties; the NHGM had a volumetric capacity of 1052 mAh cm −3 , which is nearly three times that of commercial graphite anodes (370 mAh cm −3 ), [ 33 ] and exhibited competitive characteristics over the existing Si-based and carbon/sulfur hybrid electrode materials (see Table S1 in the Supporting Information).…”
mentioning
confidence: 99%
“…1, 2 Many novel anode materials have been explored for higher specific capacity and better cycling performance, such as carbonaceous materials, [3][4][5] silicon, 6,7 tin, 8,9 metal oxides, [10][11][12][13][14][15] and so on. Among them, carbonaceous materials have demonstrated to be the most promising and common anode materials for LIBs.…”
Section: Introductionmentioning
confidence: 99%