Building an interpenetrating network of Ni(OH)(2)/reduced graphene oxide composite by a sol-gel method

摘要

Herein, a facile sol-gel strategy for building the ordered interpenetrating network of Ni(OH)(2) and reduced graphene oxide (rGO) was proposed. In this strategy, rGO nanosheets were homogeneously fixed inside composite utilizing the pores of Ni(OH)(2) gel as template, forming rGO-interpenetrated gel network. It was found that the rGO nanosheets could effectively reduce the internal resistant of composites and provide mechanical support for the gel network of Ni(OH)(2). Therefore, the composite presented high electrochemical performance, especially high-rate performance, due to the interpenetrating of rGO nanosheets plus the supplementary role of acetylene black. It had high specific capacitance of 2163 F g(-1) at low current density of 2.9 A g(-1) and 733 F g(-1) at high current density of 86.8 A g(-1).