Molybdenum Carbide-Derived Chlorine-Doped Ordered Mesoporous Carbon with Few-Layered Graphene Walls for Energy Storage Applications.

Title Molybdenum Carbide-Derived Chlorine-Doped Ordered Mesoporous Carbon with Few-Layered Graphene Walls for Energy Storage Applications.
Authors Z. Kou; B. Guo; Y. Zhao; S. Huang; T. Meng; J. Zhang; W. Li; I.Saana Amiinu; Z. Pu; M. Wang; M. Jiang; X. Liu; Y. Tang; S. Mu
Journal ACS Appl Mater Interfaces
DOI 10.1021/acsami.6b14440
Abstract

In this work, we propose a one-step process to realize the in situ evolution of molybdenum carbide (Mo2C) nanoflakes into ordered mesoporous carbon with few-layered graphene walls (OMG) by chloridization and self-organization, and simultaneously the Cl-doping of OMG (OMG-Cl) by modulating chloridization and annealing processes is fulfilled. Benefiting from the improvement of electroconductivity induced by Cl-doping, together with large specific surface area (1882 cm(2) g(-1)) and homogeneous pore structures, as anode of lithium ion batteries, OMG-Cl shows remarkable charge capacity of 1305 mA h g(-1) at current rate of 50 mA g(-1) and fast charge-discharge rate within dozens of seconds (a charge time of 46 s), as well as retains a charge capacity of 733 mA h g(-1) at a current rate of 0.5 mA g(-1) after 100 cycles. Furthermore, as a promising electrode material for supercapacitors, OMG-Cl holds the specific capacitances of 250 F g(-1) in 1 M H2SO4 solution and 220 F g(-1) at a current density of 0.5 A g(-1) in 6 M KOH solution, which are ?40% and 20% higher than those of undoped OMG electrode, respectively. The high capacitive performance of OMG-Cl material can be due to the additional fast Faradaic reactions induced from Cl-doping species.

Citation Z. Kou; B. Guo; Y. Zhao; S. Huang; T. Meng; J. Zhang; W. Li; I.Saana Amiinu; Z. Pu; M. Wang; M. Jiang; X. Liu; Y. Tang; S. Mu.Molybdenum Carbide-Derived Chlorine-Doped Ordered Mesoporous Carbon with Few-Layered Graphene Walls for Energy Storage Applications.. ACS Appl Mater Interfaces. 2017. doi:10.1021/acsami.6b14440

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Chlorine

Chlorine is a Block P, Group 17, Period 3 element. Its electron configuration is [Ne]3s23p5. The chlorine atom has a covalent radius of 102±4 pm and its Van der Waals radius is 175 pm. Chlorine ModelIn its elemental form, chlorine is a yellow-green gas. Chlorine is the second lightest halogen after fluorine. It has the third highest electronegativity and the highest electron affinity of all elements, making it a strong oxidizing agent. It is rarely found by itself in nature. Chlorine was discovered and first isolated by Carl Wilhelm Scheele in 1774. It was first recognized as an element by Humphry Davy in 1808.

Molybdenum

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