Electrochemical properties of nickel–aluminum layered double hydroxide/carbon composite fabricated by liquid phase deposition

摘要: Abstract Nickel–aluminum layered double hydroxide/carbon (Ni–Al LDH/C) composites have been fabricated using a mixed solution of {Al(NO3)3·9H2O and H3BO3} as fluoride scavengers in the liquid phase deposition (LPD) process. The amount divalent Ni2+ substituted by trivalent Al3+ within lattice α-Ni(OH)2 was controlled concentration Al(NO3)3·9H2O solution. X-ray diffraction studies reveal pure Ni–Al LDH, isostructural isomorphic to with higher interlayer distance. electrochemical properties cathode materials containing 0, 8.6, 13.8, 17.8, 21.3 23.4 Al% were evaluated means charge–discharge cyclic voltammetry measurements. overall comparison indicates that LDH/C performance than α-Ni(OH)2/C composite. 17.8 exhibits best at 1 C compared other contents; much lower voltage plateau, well separated from oxygen evolution end charging single flat high discharge plateau capacity 376.9 mAh gcomp−1. Short term durability test for 80 cycles showed electrode 13.8 has highest rate 2 C. range Al substitution 13.8–17.8 provides good response.