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. 2016 Aug 11;6:31496. doi: 10.1038/srep31496

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(a) Ultra-long term cycling stability and Coulombic efficiency of LIB based on GCNT-SnO₂(3) at 2 C, and the battery was initially run at 0.1 C for two cycles. (b) A purple LED lit up by the assembled LIB up to 420 min.