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Tests on the stability of paper in the organic electrolyte. The side with CNTs (A) and without CNTs (B) of the conductive paper soaked in organic electrolyte (1 M LiPF6 in EC/DEC). From left to right: as-coated conductive paper, paper soaked for 2 months at 30 °C, and paper soaked for 1 month at 50 °C. (C) A total of 500 cycles of Li4Ti5O12 nanopowders with conductive paper as the current collector. The mass loading of Li4Ti5O12 is ≈2 mg/cm2. The total time is about 3.5 months.
