title: Composite of macroporous carbon with honeycomb-like structure from mollusc shell and NiCo(2)O(4) nanowires for high-performance supercapacitor.
abstract: Novel biological carbon materials with highly ordered microstructure and large pore volume have caused great interest due to their multifunctional properties. Herein, we report the preparation of an interconnected porous carbon material by carbonizing the organic matrix of mollusc shell. The obtained three-dimensional carbon skeleton consists of hexangular and tightly arranged channels, which endow it with efficient electrolyte penetration and fast electron transfer, enable the mollusc shell based macroporous carbon material (MSBPC) to be an excellent conductive scaffold for supercapacitor electrodes. By growing NiCo2O4 nanowires on the obtained MSBPC, NiCo2O4/MSBPC composites were synthesized. When used on supercapacitor electrode, it exhibited anomalously high specific capacitance (∼1696 F/g), excellent rate performance (with the capacity retention of 58.6% at 15 A/g) and outstanding cycling stability (88% retention after 2000 cycles). Furthermore, an all-solid-state symmetric supercapacitor was also assembled based on this NiCo2O4/MSBPC electrode and showed good electrochemical performance with an energy density of 8.47 Wh/kg at 1 A/g, good stability over 10000 cycles. And we believe that more potential applications beyond energy storage can be developed based on this MSBPC.
authors.affiliation: Institute of Nano-Science and Nano-Technology, College of Physical Science and Technology, Central China Normal University , Wuhan 430079, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xiong
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Gao
authors.forename: Xu
authors.initials: X
authors.lastname: Wu
authors.forename: Xuan
authors.initials: X
authors.lastname: Hu
authors.forename: Danni
authors.initials: D
authors.lastname: Lan
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Chen
authors.forename: Xuli
authors.initials: X
authors.lastname: Pu
authors.forename: Yan
authors.initials: Y
authors.lastname: Zeng
authors.forename: Jun
authors.initials: J
authors.lastname: Su
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Zhu
mesh_terms: D060105:Animal Shells / Q000737:chemistry*; D000818:Animals; D002244:Carbon / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D055615:Electrical Equipment and Supplies; D008974:Mollusca / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry; D009532:Nickel / Q000737:chemistry*; D016062:Porosity; D014961:X-Ray Diffraction
chemical_list: D003035:Cobalt; D002244:Carbon; D009532:Nickel
keywords: NiCo2O4; high-performance supercapacitor; honeycomb-like structure; macroporous carbon; mollusc shell; nanowires