期刊
NANO LETTERS
卷 13, 期 4, 页码 1711-1716出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl400269d
关键词
Interface chemistry engineering; RGO/SnO2 nanosheets; polydopamine; lithium-ion battery
类别
资金
- National Basic Research Program of China [2013CB933000, 2010CB934700]
- National Natural Science Foundation of China [21004076]
- Key Development Project of Chinese Academy of Sciences [KJZD-EW-M01-3]
From the whole anode electrode of view, we report in this work a system-level strategy of fabrication of reduced graphene oxide (RGO)/SnO2 composite-based anode for lithium ion battery (LIB) to enhance the capacity and cyclic performance of SnO2-based electrode materials. RGO/SnO2 composite was first coated by a nanothick polydopamine (PD) layer and the PD-coated RGO/SnO2 composite was then cross-linked with poly(acrylic acid) (PAA) that was used as a binder to accomplish a whole anode electrode. The cross-link reaction between PAA and PD produced a robust network in the anode system to stabilize the whole anode during cycling. As a result, the designed anode exhibits an outstanding energy capacity up to 718 mAh/g at current density of 100 mA/g after 200 cycles and a good rate performance of 811, 700, 641, and 512 mAh/g at current density of 100, 250, 500, and 1000 mA/g, respectively. Fourier transform IR spectra confirm the formation of cross-link reaction and the stability of the robust network after long-term cycling. Our results indicate the importance of designing interfaces in anode system on achieving improved performance of electrode of LIBs.
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