The Cu-4[(OH)(0.29)Cl-0.71](OH)(6) hexagonal prisms, nanoplates and nanosheets are prepared by a simple hydrothermal method, and we have mainly investigated their electrochemistry properties. At 31.25, 62.5, 125, 250 and 500 mAg(-1), the discharge capacitances of hexagonal prisms (SO) electrode are 1186, 1023, 969, 934 and 918 mFg(-1), respectively; whereas 547, 508, 469, 438 and 375 mFg(-1) for hexagonal nanosheets (S10), respectively. The capacitance of 3-8 mu m-long hexagonal prisms (0.25 m(2)g(-1)) is 2 times higher than that of 50-100 nm-thick hexagonal nanosheets (3.54 m(2)g(-1)), which is obviously beyond our imagination. The high capacitance of the former sample has been mainly attributed to the atom configuration of {100} facets and the high electrical conductivity. Compared with the hexagonal tunnel atom configuration of {001} facets, the three-dimensional (3D) cage atom configuration in {100} facets favors for the charge storage, thus leading to a higher capacitance of hexagonal prisms, which has rarely been reported yet. Further, the hexagonal prisms have a higher electrical conductivity than nanoplates and nanosheets, suggesting that the one-dimensional (1D) microstructure is beneficial to the electron transfer. This work enlightens us that the electrochemistry properties of materials can be improved by the exposed facets with unique atom configuration. (C) 2017 Elsevier B.V. All rights reserved.