The Morphology Evolution of Nickel Phosphite Hexagonal Polyhedrons and Their Primary Electrochemical

Huan Pang ,* Zhenzhen Yan , Yuanyuan Wei , Xuexue Li , Juan Li , Li Zhang , Jing Chen ,*Jiangshan Zhang , and Honghe Zheng *

Nickel posphite (Ni 11 (HPO 3 ) 8 (OH) 6 ) hexagonal polyhedrons are successfullysynthesized under hydrothermal conditions. The effect of surfactants on thegrowth mechanism of Ni 11 (HPO 3 ) 8 (OH) 6 are also explored. More importantly,Ni 11 (HPO 3 ) 8 (OH) 6 hexagonal polyhedrons are successfully applied as electrochemicalsupercapacitor electrode materials, which have a good specifi ccapacitance (295 F g −1 at 0.625 A g −1 ), good rate capability, and cyclingproperties (maintained about 99.3% at 0.625 A g −1 after 1000 cycles).