Additions and corrections

A high-performance supercapacitor-battery hybrid energy storage device based on graphene-enhanced electrode materials with ultrahigh energy density

Fan Zhang, Tengfei Zhang, Xi Yang, Long Zhang, Kai Leng, Yi Huang and Yongsheng Chen

Energy Environ. Sci., 2013, 6, 1623–1632 (DOI: 10.1039/C3EE40509E ). Amendment published 17th January 2014.

On Page 1628, in the legend of Fig. 2, the original text of "(d) Cycle stability of Fe₃O₄/G at a current 720 mA g^–1 for 100 cycles" should be corrected as "(d) Cycle stability of Fe₃O₄/G at a current 2700 mA g^–1 for 100 cycles".

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

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