期刊
SMALL
卷 11, 期 23, 页码 2774-2781出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201403085
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资金
- KERI Primary research program of MSIP/ISTK [15-12-N0101-56]
- Center for Advanced Soft-Electronics - Ministry of Science, ICT and Future Planning as Global Frontier Project [2014M3A6A5060953]
- next generation secondary battery RAMP
- D program of MOTIE/KEIT in South Korea [10042575]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10042575, 15-12-N0101-56] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2014M3A6A5060953] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Monolithically structured reduced graphene oxide (rGO), prepared from a highly concentrated and conductive rGO paste, is introduced as an anode material for lithium ion batteries with high rate capacities. This is achieved by a mixture of rGO paste and the water-soluble polymer sodium carboxymethylcellulose (SCMC) with freeze drying. Unlike previous 3D graphene porous structures, the monolithic graphene resembles densely branched pine trees and has high mechanical stability with strong adhesion to the metal electrodes. The structures contain numerous large surface area open pores that facilitate lithium ion diffusion, while the strong hydrogen bonding between the graphene layers and SCMC provides high conductivity and reduces the volume changes that occur during cycling. Ultrafast charge/discharge rates are obtained with outstanding cycling stability and the capacities are higher than those reported for other anode materials. The fabrication process is simple and straightforward to adjust and is therefore suitable for mass production of anode electrodes for commercial applications.
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